Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S0108270107053711/sf3058sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S0108270107053711/sf3058Isup2.hkl | |
Structure factor file (CIF format) https://doi.org/10.1107/S0108270107053711/sf3058IIsup3.hkl |
CCDC references: 677072; 677073
The ligand synthesis was carried out under an inert N2 atmosphere. All reagents and solvents used were commercially available and used without further purification, except for the acetone in the ligand synthesis which was distilled prior to use.
For the synthesis of (I), benzoyl chloride (34.7 mmol) in acetone (20 ml) was added dropwise to an acetone solution (70 ml) of KSeCN (34.7 mmol). The mixture was stirred for 20 min and the development of an orange colour was noted, as well as the formation of a white precipitate. An acetone solution (15 ml) of dibutylamine (34.7 mmol) was added dropwise to this mixture, which was then stirred for 30 min. The mixture was added to cold water (300 ml) and the resulting oil was recrystallized from ethanol to yield crystals suitable for analysis.
For the synthesis of (II), a dichloromethane solution (25 ml) of (I) (1.278 mmol) was added to an aqueous solution (25 ml) of K2PdCl4 (0.639 mmol). The solutions were shaken together in a separating funnel and the progression of an orange colour from the aqueous to the organic layer as complexation occurred was noted. An aqueous solution (10 ml) of sodium acetate (2.558 mmol) was added, followed by gentle shaking. Extraction and drying of the organic layer was followed by the addition of ethanol. Slow evaporation from this mixture yielded crystals suitable for analysis. 1H NMR chemical shifts are quoted relative to the residual CHCl3 solvent resonance at 7.26 p.p.m., and 13C NMR chemical shifts are quoted relative to the CDCl3 triplet at 77.0 p.p.m. (centre peak). Elemental analyses were performed on a Heraeus Universal Combustion Analyser, Model CHN-Micro.
For N,N-dibutyl-N'-benzoylselenourea, yield 57.5%, m.p. 392.5–394 K. Analysis, found: C 56.6, H 7.1, N 8.2%; C16H24N2OSe requires: C 56.6, H 7.1, N 8.3%. Spectroscopic analysis: 1H NMR (400 MHz, CDCl3, δ, p.p.m.): 0.90 (t, 3H, 3JHH = 7.4 Hz, H12/H16), 0.99 (t, 3H, 3JHH = 7.4 Hz, H12/H16), 1.28 (m, 2H, 3JHH = 7.5 Hz, H11/H15), 1.45 (m, 2H, 3JHH = 7.5 Hz, H11/H15), 1.67 (q, 2H, 3JHH = 7.4 Hz, H10/H14), 1.83 (q, 2H, 3JHH = 7.4 Hz, H10/H14), 3.55 (t, 2H, 3JHH = 7.4 Hz, H9/H13), 4.08 (t, 2H, 3JHH = 7.6 Hz, H9/H13), 7.46 (t, 2H, H3, H5), 7.57 (t, 1H, H4), 7.83 (d, 2H, H2, H6), 8.54 (br s, 1H, N—H); 13C NMR (100 MHz, CDCl3, δ, p.p.m.): 13.6 (C12/C16), 13.8 (C12/C16), 19.9 (C15/C11), 20.0 (C15/C11), 28.7 (C14/C10), 29.7 (C14/C10), 53.7 (C13/C9), 56.4 (C13/C9), 127.8 (C3, C5), 128.8 (C2, C6), 132.5 (C4), 133.0 (C1), 162.1 (C7), 180.9 (C8); 1J(77Se-13C) = 222.1 Hz.
For cis-bis(N,N-dibutyl-N'-benzoylselenoureato)palladium(II), yield 94.2%, m.p. 423.5–424.4 K. Analysis, found: C 49.1, H 5.8, N 7.1%; C32H46N4O2Se2Pd requires: C 49.1, H 5.9, N 7.2%. Spectroscopic analysis: 1H NMR (400 MHz, CDCl3, δ, p.p.m.): 0.93 (t, 6H, 3JHH = 7.4 Hz, H12A/B or H16A/B), 0.98 (t, 6H, 3JHH = 7.4 Hz, H12A/B or H16A/B), 1.38 (m, 8H, 3JHH = 7.6 Hz, H11A/B, H15A/B), 1.67 (q, 4H, 3JHH = 7.7 Hz, H10A/B or H14A/B), 1.76 (q, 4H, 3JHH = 7.8 Hz, H10A/B or H14A/B), 3.78 (m, 8H, 3JHH = 7.8 Hz, H9A/B, H13A/B), 7.40 (t, 4H, H3A/B, H5A/B), 7.49 (t, 2H, H4A/B), 8.23 (d, 4H, H2A/B, H6A/B); 13C NMR (101 MHz, CDCl3, δ, p.p.m.): 13.8, 13.9 (C12A/B, C16A/B), 20.2, 20.3 (C11A/B, C15A/B), 29.9, 30.0 (C10A/B, C14A/B), 51.8, 54.7 (C9A/B, C13A/B), 127.9 (C3A/B, C5A/B), 129.7 (C2A/B, C6A/B), 131.4 (C4A/B), 137.2 (C1A/B), 166.7 (C8A/B), 170.8 (C7A/B). 1J(77Se-13C) = 176.5 Hz.
H atoms involved in hydrogen bonding were located in difference electron-density maps and restrained to N—H = 0.85 Å with Uiso(H) = 1.2Ueq(N). All other H atoms were placed in geometrically calculated positions, with C—H = 0.99 (for –CH2), 0.98 (for –CH3) or 0.95 Å (for phenyl H), and refined using a riding model, with Uiso(H) = 1.2Ueq(C) for –CH2 and phenyl, or 1.5 Ueq(C) for –CH3.
For both compounds, data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: X-SEED (Barbour, 2001).
C16H24N2OSe | F(000) = 704 |
Mr = 339.33 | Dx = 1.375 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 2631 reflections |
a = 10.3880 (17) Å | θ = 2.4–27.2° |
b = 15.715 (3) Å | µ = 2.29 mm−1 |
c = 10.1518 (16) Å | T = 273 K |
β = 98.423 (3)° | Block, yellow |
V = 1639.4 (5) Å3 | 0.20 × 0.16 × 0.14 mm |
Z = 4 |
Bruker APEX CCD area-detector diffractometer | 3775 independent reflections |
Radiation source: fine-focus sealed tube | 3031 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.038 |
ω scans | θmax = 28.3°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | h = −11→13 |
Tmin = 0.651, Tmax = 0.732 | k = −20→20 |
10228 measured reflections | l = −9→13 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.037 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.085 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0423P)2] where P = (Fo2 + 2Fc2)/3 |
3775 reflections | (Δ/σ)max < 0.001 |
187 parameters | Δρmax = 0.55 e Å−3 |
0 restraints | Δρmin = −0.33 e Å−3 |
C16H24N2OSe | V = 1639.4 (5) Å3 |
Mr = 339.33 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 10.3880 (17) Å | µ = 2.29 mm−1 |
b = 15.715 (3) Å | T = 273 K |
c = 10.1518 (16) Å | 0.20 × 0.16 × 0.14 mm |
β = 98.423 (3)° |
Bruker APEX CCD area-detector diffractometer | 3775 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | 3031 reflections with I > 2σ(I) |
Tmin = 0.651, Tmax = 0.732 | Rint = 0.038 |
10228 measured reflections |
R[F2 > 2σ(F2)] = 0.037 | 0 restraints |
wR(F2) = 0.085 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.55 e Å−3 |
3775 reflections | Δρmin = −0.33 e Å−3 |
187 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
Se1 | −0.19333 (2) | 0.431363 (15) | 0.46477 (2) | 0.01660 (9) | |
O1 | −0.00770 (17) | 0.41704 (11) | 0.12025 (17) | 0.0192 (4) | |
C7 | 0.0657 (2) | 0.42323 (14) | 0.2242 (2) | 0.0147 (5) | |
N1 | 0.0293 (2) | 0.40125 (13) | 0.3469 (2) | 0.0157 (4) | |
N2 | −0.13174 (19) | 0.29950 (13) | 0.29734 (19) | 0.0160 (4) | |
C2 | 0.3013 (2) | 0.42633 (16) | 0.3311 (2) | 0.0187 (5) | |
H2 | 0.2814 | 0.3911 | 0.3989 | 0.022* | |
C8 | −0.0953 (2) | 0.37107 (15) | 0.3587 (2) | 0.0150 (5) | |
C11 | 0.1152 (3) | 0.12124 (16) | 0.2761 (3) | 0.0231 (6) | |
H11A | 0.1624 | 0.0864 | 0.3459 | 0.028* | |
H11B | 0.0573 | 0.0841 | 0.2185 | 0.028* | |
C12 | 0.2117 (3) | 0.16076 (17) | 0.1957 (3) | 0.0244 (6) | |
H12B | 0.2630 | 0.2025 | 0.2489 | 0.037* | |
H12A | 0.1654 | 0.1876 | 0.1178 | 0.037* | |
H12C | 0.2676 | 0.1173 | 0.1693 | 0.037* | |
C14 | −0.3490 (2) | 0.29865 (16) | 0.1623 (2) | 0.0192 (5) | |
H14B | −0.3059 | 0.2848 | 0.0865 | 0.023* | |
H14A | −0.3571 | 0.3601 | 0.1660 | 0.023* | |
C15 | −0.4839 (2) | 0.25914 (18) | 0.1427 (3) | 0.0253 (6) | |
H15B | −0.4759 | 0.1980 | 0.1332 | 0.030* | |
H15A | −0.5246 | 0.2698 | 0.2212 | 0.030* | |
C5 | 0.3607 (3) | 0.53127 (17) | 0.1294 (3) | 0.0256 (6) | |
H5 | 0.3813 | 0.5670 | 0.0625 | 0.031* | |
C13 | −0.2659 (2) | 0.26777 (16) | 0.2885 (2) | 0.0198 (5) | |
H13A | −0.3033 | 0.2872 | 0.3653 | 0.024* | |
H13B | −0.2651 | 0.2061 | 0.2896 | 0.024* | |
C1 | 0.2029 (2) | 0.45289 (15) | 0.2307 (2) | 0.0157 (5) | |
C4 | 0.4579 (3) | 0.50483 (17) | 0.2288 (3) | 0.0271 (6) | |
H4 | 0.5433 | 0.5223 | 0.2279 | 0.032* | |
C9 | −0.0438 (2) | 0.24274 (15) | 0.2357 (2) | 0.0182 (5) | |
H9A | 0.0153 | 0.2768 | 0.1920 | 0.022* | |
H9B | −0.0947 | 0.2077 | 0.1686 | 0.022* | |
C3 | 0.4282 (3) | 0.45243 (17) | 0.3297 (3) | 0.0235 (6) | |
H3 | 0.4936 | 0.4348 | 0.3966 | 0.028* | |
C6 | 0.2331 (3) | 0.50514 (15) | 0.1282 (2) | 0.0196 (5) | |
H6 | 0.1685 | 0.5222 | 0.0600 | 0.024* | |
C10 | 0.0342 (3) | 0.18581 (16) | 0.3390 (2) | 0.0213 (6) | |
H10A | 0.0912 | 0.2207 | 0.4011 | 0.026* | |
H10B | −0.0249 | 0.1561 | 0.3887 | 0.026* | |
C16 | −0.5707 (3) | 0.29393 (19) | 0.0215 (3) | 0.0268 (6) | |
H16C | −0.5294 | 0.2856 | −0.0562 | 0.040* | |
H16A | −0.5849 | 0.3536 | 0.0335 | 0.040* | |
H16B | −0.6526 | 0.2646 | 0.0104 | 0.040* | |
H1 | 0.062 (3) | 0.4321 (16) | 0.409 (3) | 0.015 (7)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Se1 | 0.01405 (14) | 0.01869 (14) | 0.01733 (14) | −0.00070 (10) | 0.00318 (9) | −0.00252 (10) |
O1 | 0.0197 (9) | 0.0215 (9) | 0.0154 (9) | −0.0010 (7) | −0.0007 (7) | 0.0010 (7) |
C7 | 0.0161 (12) | 0.0119 (11) | 0.0160 (12) | 0.0031 (9) | 0.0022 (10) | −0.0006 (9) |
N1 | 0.0156 (11) | 0.0186 (10) | 0.0125 (11) | −0.0028 (9) | 0.0010 (8) | −0.0030 (9) |
N2 | 0.0161 (10) | 0.0172 (10) | 0.0140 (10) | −0.0014 (8) | −0.0001 (8) | −0.0008 (8) |
C2 | 0.0193 (13) | 0.0222 (13) | 0.0149 (12) | 0.0014 (11) | 0.0032 (10) | −0.0023 (10) |
C8 | 0.0144 (12) | 0.0182 (12) | 0.0117 (12) | −0.0011 (10) | 0.0000 (9) | 0.0024 (9) |
C11 | 0.0246 (14) | 0.0181 (13) | 0.0254 (15) | 0.0033 (11) | −0.0002 (11) | 0.0051 (11) |
C12 | 0.0216 (14) | 0.0260 (14) | 0.0255 (14) | 0.0029 (12) | 0.0029 (11) | −0.0011 (11) |
C14 | 0.0179 (13) | 0.0234 (13) | 0.0162 (13) | −0.0009 (11) | 0.0020 (10) | −0.0013 (10) |
C15 | 0.0227 (14) | 0.0294 (15) | 0.0221 (14) | −0.0069 (12) | −0.0020 (11) | 0.0022 (11) |
C5 | 0.0288 (15) | 0.0225 (14) | 0.0279 (16) | −0.0047 (12) | 0.0117 (12) | 0.0018 (11) |
C13 | 0.0204 (13) | 0.0189 (13) | 0.0196 (13) | −0.0046 (10) | 0.0014 (10) | −0.0010 (10) |
C1 | 0.0160 (12) | 0.0140 (11) | 0.0173 (13) | 0.0023 (10) | 0.0034 (10) | −0.0039 (9) |
C4 | 0.0180 (14) | 0.0286 (15) | 0.0363 (17) | −0.0047 (12) | 0.0095 (12) | −0.0079 (12) |
C9 | 0.0206 (13) | 0.0165 (12) | 0.0166 (13) | 0.0007 (10) | −0.0002 (10) | −0.0038 (10) |
C3 | 0.0166 (13) | 0.0292 (14) | 0.0240 (14) | 0.0025 (11) | 0.0008 (11) | −0.0071 (11) |
C6 | 0.0238 (14) | 0.0187 (12) | 0.0168 (13) | 0.0030 (11) | 0.0046 (10) | 0.0002 (10) |
C10 | 0.0237 (14) | 0.0226 (13) | 0.0176 (13) | −0.0012 (11) | 0.0036 (11) | 0.0023 (10) |
C16 | 0.0209 (14) | 0.0376 (16) | 0.0210 (14) | −0.0050 (12) | 0.0003 (11) | 0.0030 (12) |
Se1—C8 | 1.848 (2) | C14—H14A | 0.9700 |
O1—C7 | 1.212 (3) | C15—C16 | 1.517 (4) |
C7—N1 | 1.397 (3) | C15—H15B | 0.9700 |
C7—C1 | 1.492 (3) | C15—H15A | 0.9700 |
N1—C8 | 1.399 (3) | C5—C4 | 1.383 (4) |
N1—H1 | 0.83 (3) | C5—C6 | 1.386 (4) |
N2—C8 | 1.314 (3) | C5—H5 | 0.9300 |
N2—C13 | 1.470 (3) | C13—H13A | 0.9700 |
N2—C9 | 1.480 (3) | C13—H13B | 0.9700 |
C2—C3 | 1.383 (4) | C1—C6 | 1.397 (3) |
C2—C1 | 1.397 (3) | C4—C3 | 1.384 (4) |
C2—H2 | 0.9300 | C4—H4 | 0.9300 |
C11—C12 | 1.515 (3) | C9—C10 | 1.519 (3) |
C11—C10 | 1.517 (3) | C9—H9A | 0.9700 |
C11—H11A | 0.9700 | C9—H9B | 0.9700 |
C11—H11B | 0.9700 | C3—H3 | 0.9300 |
C12—H12B | 0.9600 | C6—H6 | 0.9300 |
C12—H12A | 0.9600 | C10—H10A | 0.9700 |
C12—H12C | 0.9600 | C10—H10B | 0.9700 |
C14—C13 | 1.516 (3) | C16—H16C | 0.9600 |
C14—C15 | 1.520 (3) | C16—H16A | 0.9600 |
C14—H14B | 0.9700 | C16—H16B | 0.9600 |
O1—C7—N1 | 122.6 (2) | C4—C5—C6 | 120.8 (3) |
O1—C7—C1 | 122.6 (2) | C4—C5—H5 | 119.6 |
N1—C7—C1 | 114.8 (2) | C6—C5—H5 | 119.6 |
C7—N1—C8 | 122.3 (2) | N2—C13—C14 | 111.09 (19) |
C7—N1—H1 | 113.3 (18) | N2—C13—H13A | 109.4 |
C8—N1—H1 | 114.8 (18) | C14—C13—H13A | 109.4 |
C8—N2—C13 | 121.6 (2) | N2—C13—H13B | 109.4 |
C8—N2—C9 | 124.3 (2) | C14—C13—H13B | 109.4 |
C13—N2—C9 | 114.10 (19) | H13A—C13—H13B | 108.0 |
C3—C2—C1 | 120.0 (2) | C6—C1—C2 | 119.9 (2) |
C3—C2—H2 | 120.0 | C6—C1—C7 | 117.9 (2) |
C1—C2—H2 | 120.0 | C2—C1—C7 | 122.0 (2) |
N2—C8—N1 | 117.1 (2) | C5—C4—C3 | 120.1 (3) |
N2—C8—Se1 | 124.72 (18) | C5—C4—H4 | 120.0 |
N1—C8—Se1 | 118.14 (17) | C3—C4—H4 | 120.0 |
C12—C11—C10 | 113.8 (2) | N2—C9—C10 | 111.30 (19) |
C12—C11—H11A | 108.8 | N2—C9—H9A | 109.4 |
C10—C11—H11A | 108.8 | C10—C9—H9A | 109.4 |
C12—C11—H11B | 108.8 | N2—C9—H9B | 109.4 |
C10—C11—H11B | 108.8 | C10—C9—H9B | 109.4 |
H11A—C11—H11B | 107.7 | H9A—C9—H9B | 108.0 |
C11—C12—H12B | 109.5 | C2—C3—C4 | 120.0 (3) |
C11—C12—H12A | 109.5 | C2—C3—H3 | 120.0 |
H12B—C12—H12A | 109.5 | C4—C3—H3 | 120.0 |
C11—C12—H12C | 109.5 | C5—C6—C1 | 119.1 (2) |
H12B—C12—H12C | 109.5 | C5—C6—H6 | 120.5 |
H12A—C12—H12C | 109.5 | C1—C6—H6 | 120.5 |
C13—C14—C15 | 112.3 (2) | C11—C10—C9 | 112.1 (2) |
C13—C14—H14B | 109.1 | C11—C10—H10A | 109.2 |
C15—C14—H14B | 109.1 | C9—C10—H10A | 109.2 |
C13—C14—H14A | 109.1 | C11—C10—H10B | 109.2 |
C15—C14—H14A | 109.1 | C9—C10—H10B | 109.2 |
H14B—C14—H14A | 107.9 | H10A—C10—H10B | 107.9 |
C16—C15—C14 | 112.7 (2) | C15—C16—H16C | 109.5 |
C16—C15—H15B | 109.0 | C15—C16—H16A | 109.5 |
C14—C15—H15B | 109.0 | H16C—C16—H16A | 109.5 |
C16—C15—H15A | 109.0 | C15—C16—H16B | 109.5 |
C14—C15—H15A | 109.0 | H16C—C16—H16B | 109.5 |
H15B—C15—H15A | 107.8 | H16A—C16—H16B | 109.5 |
O1—C7—N1—C8 | −0.5 (4) | O1—C7—C1—C6 | 25.4 (3) |
C1—C7—N1—C8 | −179.1 (2) | N1—C7—C1—C6 | −156.0 (2) |
C13—N2—C8—N1 | −172.0 (2) | O1—C7—C1—C2 | −151.1 (2) |
C9—N2—C8—N1 | 10.1 (3) | N1—C7—C1—C2 | 27.5 (3) |
C13—N2—C8—Se1 | 10.9 (3) | C6—C5—C4—C3 | −0.8 (4) |
C9—N2—C8—Se1 | −166.99 (17) | C8—N2—C9—C10 | 81.4 (3) |
C7—N1—C8—N2 | 61.6 (3) | C13—N2—C9—C10 | −96.7 (2) |
C7—N1—C8—Se1 | −121.1 (2) | C1—C2—C3—C4 | −0.1 (4) |
C13—C14—C15—C16 | 176.3 (2) | C5—C4—C3—C2 | 0.1 (4) |
C8—N2—C13—C14 | 92.0 (3) | C4—C5—C6—C1 | 1.4 (4) |
C9—N2—C13—C14 | −89.9 (2) | C2—C1—C6—C5 | −1.3 (4) |
C15—C14—C13—N2 | 173.7 (2) | C7—C1—C6—C5 | −177.9 (2) |
C3—C2—C1—C6 | 0.6 (4) | C12—C11—C10—C9 | 58.9 (3) |
C3—C2—C1—C7 | 177.1 (2) | N2—C9—C10—C11 | 174.4 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···Se1i | 0.83 (3) | 2.76 (3) | 3.539 (2) | 159 (2) |
C6—H6···O1ii | 0.93 | 2.48 | 3.407 (3) | 174 |
Symmetry codes: (i) −x, −y+1, −z+1; (ii) −x, −y+1, −z. |
[Pd(C16H23N2OSe)2] | Z = 2 |
Mr = 783.05 | F(000) = 792 |
Triclinic, P1 | Dx = 1.593 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.9302 (8) Å | Cell parameters from 6089 reflections |
b = 10.9315 (9) Å | θ = 2.5–28.1° |
c = 15.4119 (13) Å | µ = 2.83 mm−1 |
α = 80.216 (1)° | T = 173 K |
β = 88.291 (1)° | Prism, brown |
γ = 81.867 (1)° | 0.09 × 0.08 × 0.08 mm |
V = 1632.0 (2) Å3 |
Bruker APEX CCD area-detector diffractometer | 7329 independent reflections |
Radiation source: fine-focus sealed tube | 6802 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.017 |
ω scans | θmax = 28.3°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | h = −13→13 |
Tmin = 0.785, Tmax = 0.797 | k = −14→13 |
18809 measured reflections | l = −19→20 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.022 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.056 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0306P)2 + 0.7045P] where P = (Fo2 + 2Fc2)/3 |
7329 reflections | (Δ/σ)max = 0.001 |
374 parameters | Δρmax = 0.55 e Å−3 |
0 restraints | Δρmin = −0.38 e Å−3 |
[Pd(C16H23N2OSe)2] | γ = 81.867 (1)° |
Mr = 783.05 | V = 1632.0 (2) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.9302 (8) Å | Mo Kα radiation |
b = 10.9315 (9) Å | µ = 2.83 mm−1 |
c = 15.4119 (13) Å | T = 173 K |
α = 80.216 (1)° | 0.09 × 0.08 × 0.08 mm |
β = 88.291 (1)° |
Bruker APEX CCD area-detector diffractometer | 7329 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | 6802 reflections with I > 2σ(I) |
Tmin = 0.785, Tmax = 0.797 | Rint = 0.017 |
18809 measured reflections |
R[F2 > 2σ(F2)] = 0.022 | 0 restraints |
wR(F2) = 0.056 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.55 e Å−3 |
7329 reflections | Δρmin = −0.38 e Å−3 |
374 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
Pd1 | 0.770245 (12) | 0.454364 (12) | 0.247821 (8) | 0.01375 (4) | |
Se1A | 0.547248 (17) | 0.556941 (16) | 0.222043 (11) | 0.01692 (5) | |
Se1B | 0.817164 (18) | 0.632990 (16) | 0.299743 (12) | 0.01941 (5) | |
O1B | 0.96158 (13) | 0.36044 (12) | 0.27371 (9) | 0.0201 (3) | |
O1A | 0.73153 (13) | 0.29951 (12) | 0.20070 (8) | 0.0194 (3) | |
N2A | 0.37899 (14) | 0.53175 (13) | 0.08718 (9) | 0.0146 (3) | |
C9B | 1.14223 (18) | 0.61760 (17) | 0.46837 (11) | 0.0163 (3) | |
H13A | 1.1755 | 0.5268 | 0.4744 | 0.020* | |
H13B | 1.1302 | 0.6388 | 0.5283 | 0.020* | |
N1B | 1.07650 (14) | 0.48060 (14) | 0.35262 (9) | 0.0147 (3) | |
N2B | 1.00896 (14) | 0.64422 (13) | 0.42335 (9) | 0.0147 (3) | |
C9A | 0.30972 (17) | 0.46624 (17) | 0.02896 (11) | 0.0157 (3) | |
H9AA | 0.3769 | 0.4026 | 0.0070 | 0.019* | |
H9AB | 0.2725 | 0.5274 | −0.0225 | 0.019* | |
C8A | 0.48186 (17) | 0.46962 (16) | 0.13838 (11) | 0.0143 (3) | |
C10A | 0.19479 (17) | 0.40237 (17) | 0.07591 (11) | 0.0169 (3) | |
H10A | 0.2310 | 0.3447 | 0.1293 | 0.020* | |
H11B | 0.1249 | 0.4666 | 0.0949 | 0.020* | |
C10B | 1.24854 (17) | 0.69094 (17) | 0.41918 (11) | 0.0176 (4) | |
H12A | 1.2202 | 0.7817 | 0.4185 | 0.021* | |
H12B | 1.2546 | 0.6763 | 0.3575 | 0.021* | |
C8B | 0.98127 (17) | 0.57589 (16) | 0.36358 (11) | 0.0145 (3) | |
C2B | 1.31349 (18) | 0.31619 (18) | 0.33731 (11) | 0.0184 (4) | |
H2B | 1.3220 | 0.3970 | 0.3497 | 0.022* | |
C14A | 0.21303 (18) | 0.68508 (17) | 0.15592 (11) | 0.0180 (4) | |
H15A | 0.1257 | 0.6705 | 0.1329 | 0.022* | |
H15B | 0.2341 | 0.6239 | 0.2106 | 0.022* | |
C3A | 0.5343 (2) | −0.02689 (18) | 0.10928 (12) | 0.0224 (4) | |
H3A | 0.4569 | −0.0574 | 0.0907 | 0.027* | |
C15A | 0.1986 (2) | 0.81801 (18) | 0.17714 (12) | 0.0223 (4) | |
H17A | 0.1290 | 0.8255 | 0.2240 | 0.027* | |
H17B | 0.2861 | 0.8311 | 0.2008 | 0.027* | |
C6B | 1.17617 (18) | 0.17012 (17) | 0.29705 (11) | 0.0183 (4) | |
H6B | 1.0908 | 0.1515 | 0.2806 | 0.022* | |
C4B | 1.41481 (19) | 0.10644 (19) | 0.32571 (12) | 0.0230 (4) | |
H4B | 1.4924 | 0.0440 | 0.3298 | 0.028* | |
C6A | 0.76049 (18) | 0.06160 (17) | 0.16393 (11) | 0.0176 (3) | |
H6A | 0.8382 | 0.0916 | 0.1825 | 0.021* | |
C2A | 0.52651 (18) | 0.09833 (17) | 0.11778 (12) | 0.0187 (4) | |
H2A | 0.4444 | 0.1536 | 0.1039 | 0.022* | |
C5B | 1.28965 (19) | 0.07855 (18) | 0.30357 (12) | 0.0217 (4) | |
H5B | 1.2814 | −0.0031 | 0.2928 | 0.026* | |
C5A | 0.76796 (19) | −0.06295 (17) | 0.15395 (12) | 0.0208 (4) | |
H5A | 0.8510 | −0.1178 | 0.1651 | 0.025* | |
C7A | 0.63071 (17) | 0.27561 (16) | 0.16131 (10) | 0.0143 (3) | |
C16B | 0.8200 (2) | 1.10473 (18) | 0.40251 (13) | 0.0255 (4) | |
H25A | 0.9098 | 1.1236 | 0.4162 | 0.038* | |
H25B | 0.7493 | 1.1591 | 0.4290 | 0.038* | |
H25C | 0.8081 | 1.1194 | 0.3385 | 0.038* | |
C13B | 0.91040 (18) | 0.74404 (16) | 0.45145 (11) | 0.0172 (3) | |
H26A | 0.9239 | 0.7430 | 0.5150 | 0.021* | |
H26B | 0.8177 | 0.7238 | 0.4445 | 0.021* | |
C12A | 0.00536 (19) | 0.27661 (19) | 0.06108 (13) | 0.0244 (4) | |
H27A | 0.0324 | 0.2216 | 0.1167 | 0.037* | |
H27B | −0.0330 | 0.2287 | 0.0220 | 0.037* | |
H27C | −0.0631 | 0.3458 | 0.0728 | 0.037* | |
C1B | 1.18762 (17) | 0.28944 (17) | 0.31464 (10) | 0.0152 (3) | |
C1A | 0.63908 (17) | 0.14309 (16) | 0.14675 (10) | 0.0146 (3) | |
C4A | 0.6543 (2) | −0.10739 (17) | 0.12768 (12) | 0.0219 (4) | |
H4A | 0.6588 | −0.1932 | 0.1223 | 0.026* | |
C11A | 0.12917 (19) | 0.32892 (19) | 0.01731 (12) | 0.0225 (4) | |
H31A | 0.1015 | 0.3844 | −0.0388 | 0.027* | |
H31B | 0.1966 | 0.2590 | 0.0035 | 0.027* | |
C11B | 1.38801 (18) | 0.65209 (19) | 0.46216 (13) | 0.0231 (4) | |
H32A | 1.3774 | 0.6459 | 0.5268 | 0.028* | |
H32B | 1.4262 | 0.5681 | 0.4497 | 0.028* | |
C13A | 0.32587 (17) | 0.66404 (16) | 0.08770 (11) | 0.0166 (3) | |
H33A | 0.2901 | 0.7019 | 0.0285 | 0.020* | |
H33B | 0.4019 | 0.7085 | 0.0994 | 0.020* | |
C15B | 0.80887 (19) | 0.96858 (18) | 0.43930 (13) | 0.0227 (4) | |
H34A | 0.7178 | 0.9505 | 0.4254 | 0.027* | |
H34B | 0.8169 | 0.9556 | 0.5042 | 0.027* | |
C16A | 0.1590 (2) | 0.92151 (19) | 0.09893 (13) | 0.0271 (4) | |
H35A | 0.2259 | 0.9138 | 0.0514 | 0.041* | |
H35B | 0.1569 | 1.0034 | 0.1171 | 0.041* | |
H35C | 0.0689 | 0.9138 | 0.0780 | 0.041* | |
C7B | 1.06315 (17) | 0.38560 (16) | 0.31088 (11) | 0.0149 (3) | |
C14B | 0.91719 (18) | 0.87620 (16) | 0.40298 (11) | 0.0175 (3) | |
H38A | 0.9021 | 0.8799 | 0.3393 | 0.021* | |
H38B | 1.0085 | 0.8994 | 0.4103 | 0.021* | |
C3B | 1.42681 (19) | 0.22501 (19) | 0.34190 (12) | 0.0226 (4) | |
H3B | 1.5130 | 0.2442 | 0.3562 | 0.027* | |
C12B | 1.4869 (2) | 0.7439 (2) | 0.42947 (15) | 0.0349 (5) | |
H40A | 1.4956 | 0.7524 | 0.3653 | 0.052* | |
H40B | 1.5760 | 0.7128 | 0.4564 | 0.052* | |
H40C | 1.4529 | 0.8257 | 0.4456 | 0.052* | |
N1A | 0.52080 (14) | 0.35107 (14) | 0.12834 (9) | 0.0151 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pd1 | 0.01128 (7) | 0.01286 (7) | 0.01776 (7) | −0.00194 (5) | −0.00408 (5) | −0.00350 (5) |
Se1A | 0.01248 (9) | 0.01599 (9) | 0.02368 (9) | −0.00062 (6) | −0.00464 (7) | −0.00762 (7) |
Se1B | 0.01574 (9) | 0.01337 (9) | 0.02999 (10) | 0.00011 (6) | −0.00997 (7) | −0.00614 (7) |
O1B | 0.0150 (6) | 0.0183 (6) | 0.0285 (7) | −0.0003 (5) | −0.0069 (5) | −0.0090 (5) |
O1A | 0.0146 (6) | 0.0170 (6) | 0.0282 (7) | −0.0010 (5) | −0.0069 (5) | −0.0081 (5) |
N2A | 0.0122 (7) | 0.0149 (7) | 0.0168 (7) | −0.0030 (5) | −0.0010 (5) | −0.0023 (6) |
C9B | 0.0168 (8) | 0.0167 (8) | 0.0160 (8) | −0.0036 (6) | −0.0051 (6) | −0.0026 (6) |
N1B | 0.0125 (7) | 0.0168 (7) | 0.0155 (6) | −0.0035 (5) | −0.0011 (5) | −0.0032 (6) |
N2B | 0.0136 (7) | 0.0132 (7) | 0.0177 (7) | −0.0023 (5) | −0.0016 (5) | −0.0029 (5) |
C9A | 0.0134 (8) | 0.0197 (9) | 0.0144 (7) | −0.0025 (6) | −0.0037 (6) | −0.0034 (7) |
C8A | 0.0111 (8) | 0.0174 (8) | 0.0150 (7) | −0.0051 (6) | 0.0012 (6) | −0.0024 (6) |
C10A | 0.0132 (8) | 0.0204 (9) | 0.0183 (8) | −0.0046 (7) | 0.0000 (6) | −0.0050 (7) |
C10B | 0.0125 (8) | 0.0206 (9) | 0.0193 (8) | −0.0013 (7) | −0.0026 (6) | −0.0024 (7) |
C8B | 0.0136 (8) | 0.0150 (8) | 0.0149 (7) | −0.0052 (6) | −0.0024 (6) | 0.0009 (6) |
C2B | 0.0171 (9) | 0.0207 (9) | 0.0183 (8) | −0.0027 (7) | 0.0007 (7) | −0.0056 (7) |
C14A | 0.0166 (8) | 0.0181 (9) | 0.0188 (8) | −0.0017 (7) | 0.0002 (7) | −0.0028 (7) |
C3A | 0.0237 (10) | 0.0217 (10) | 0.0251 (9) | −0.0097 (7) | −0.0017 (7) | −0.0077 (7) |
C15A | 0.0243 (10) | 0.0224 (10) | 0.0209 (8) | −0.0006 (8) | −0.0006 (7) | −0.0076 (7) |
C6B | 0.0182 (9) | 0.0194 (9) | 0.0177 (8) | −0.0020 (7) | −0.0015 (7) | −0.0049 (7) |
C4B | 0.0196 (9) | 0.0265 (10) | 0.0199 (8) | 0.0059 (7) | 0.0004 (7) | −0.0035 (7) |
C6A | 0.0169 (8) | 0.0180 (9) | 0.0183 (8) | −0.0032 (7) | −0.0009 (7) | −0.0032 (7) |
C2A | 0.0184 (9) | 0.0169 (9) | 0.0214 (8) | −0.0031 (7) | −0.0019 (7) | −0.0044 (7) |
C5B | 0.0246 (10) | 0.0200 (9) | 0.0197 (8) | 0.0018 (7) | 0.0000 (7) | −0.0054 (7) |
C5A | 0.0222 (9) | 0.0166 (9) | 0.0221 (9) | 0.0003 (7) | 0.0010 (7) | −0.0019 (7) |
C7A | 0.0146 (8) | 0.0160 (8) | 0.0131 (7) | −0.0044 (6) | 0.0013 (6) | −0.0029 (6) |
C16B | 0.0289 (10) | 0.0205 (10) | 0.0264 (9) | 0.0049 (8) | −0.0038 (8) | −0.0086 (8) |
C13B | 0.0172 (8) | 0.0168 (9) | 0.0187 (8) | −0.0029 (7) | 0.0017 (7) | −0.0064 (7) |
C12A | 0.0198 (9) | 0.0264 (10) | 0.0283 (10) | −0.0082 (8) | −0.0057 (8) | −0.0038 (8) |
C1B | 0.0140 (8) | 0.0189 (9) | 0.0120 (7) | −0.0008 (6) | 0.0002 (6) | −0.0017 (6) |
C1A | 0.0169 (8) | 0.0142 (8) | 0.0130 (7) | −0.0036 (6) | 0.0005 (6) | −0.0019 (6) |
C4A | 0.0303 (10) | 0.0141 (9) | 0.0225 (9) | −0.0066 (7) | 0.0043 (8) | −0.0041 (7) |
C11A | 0.0213 (9) | 0.0273 (10) | 0.0213 (9) | −0.0081 (8) | −0.0022 (7) | −0.0069 (8) |
C11B | 0.0159 (9) | 0.0258 (10) | 0.0278 (9) | 0.0039 (7) | −0.0066 (7) | −0.0091 (8) |
C13A | 0.0153 (8) | 0.0142 (8) | 0.0189 (8) | −0.0007 (6) | −0.0022 (6) | 0.0002 (7) |
C15B | 0.0186 (9) | 0.0221 (10) | 0.0273 (9) | 0.0014 (7) | 0.0015 (7) | −0.0074 (8) |
C16A | 0.0286 (10) | 0.0209 (10) | 0.0311 (10) | 0.0019 (8) | −0.0040 (8) | −0.0058 (8) |
C7B | 0.0149 (8) | 0.0153 (8) | 0.0138 (7) | −0.0020 (6) | −0.0002 (6) | −0.0002 (6) |
C14B | 0.0163 (8) | 0.0161 (9) | 0.0199 (8) | −0.0003 (7) | −0.0003 (7) | −0.0041 (7) |
C3B | 0.0143 (9) | 0.0319 (11) | 0.0210 (9) | 0.0002 (7) | −0.0013 (7) | −0.0054 (8) |
C12B | 0.0165 (10) | 0.0572 (15) | 0.0344 (11) | −0.0103 (9) | 0.0010 (8) | −0.0130 (10) |
N1A | 0.0130 (7) | 0.0155 (7) | 0.0169 (7) | −0.0032 (5) | −0.0027 (5) | −0.0019 (6) |
Pd1—O1A | 2.0395 (12) | C4B—C3B | 1.383 (3) |
Pd1—O1B | 2.0439 (12) | C4B—C5B | 1.386 (3) |
Pd1—Se1B | 2.3411 (3) | C4B—H4B | 0.9500 |
Pd1—Se1A | 2.3489 (3) | C6A—C5A | 1.387 (3) |
Se1A—C8A | 1.9076 (17) | C6A—C1A | 1.397 (2) |
Se1B—C8B | 1.9006 (16) | C6A—H6A | 0.9500 |
O1B—C7B | 1.260 (2) | C2A—C1A | 1.395 (2) |
O1A—C7A | 1.266 (2) | C2A—H2A | 0.9500 |
N2A—C8A | 1.341 (2) | C5B—H5B | 0.9500 |
N2A—C13A | 1.469 (2) | C5A—C4A | 1.387 (3) |
N2A—C9A | 1.478 (2) | C5A—H5A | 0.9500 |
C9B—N2B | 1.481 (2) | C7A—N1A | 1.329 (2) |
C9B—C10B | 1.522 (3) | C7A—C1A | 1.494 (2) |
C9B—H13A | 0.9900 | C16B—C15B | 1.518 (3) |
C9B—H13B | 0.9900 | C16B—H25A | 0.9800 |
N1B—C8B | 1.334 (2) | C16B—H25B | 0.9800 |
N1B—C7B | 1.335 (2) | C16B—H25C | 0.9800 |
N2B—C8B | 1.338 (2) | C13B—C14B | 1.519 (2) |
N2B—C13B | 1.473 (2) | C13B—H26A | 0.9900 |
C9A—C10A | 1.523 (2) | C13B—H26B | 0.9900 |
C9A—H9AA | 0.9900 | C12A—C11A | 1.521 (3) |
C9A—H9AB | 0.9900 | C12A—H27A | 0.9800 |
C8A—N1A | 1.333 (2) | C12A—H27B | 0.9800 |
C10A—C11A | 1.521 (2) | C12A—H27C | 0.9800 |
C10A—H10A | 0.9900 | C1B—C7B | 1.501 (2) |
C10A—H11B | 0.9900 | C4A—H4A | 0.9500 |
C10B—C11B | 1.526 (2) | C11A—H31A | 0.9900 |
C10B—H12A | 0.9900 | C11A—H31B | 0.9900 |
C10B—H12B | 0.9900 | C11B—C12B | 1.517 (3) |
C2B—C3B | 1.389 (2) | C11B—H32A | 0.9900 |
C2B—C1B | 1.391 (2) | C11B—H32B | 0.9900 |
C2B—H2B | 0.9500 | C13A—H33A | 0.9900 |
C14A—C15A | 1.529 (3) | C13A—H33B | 0.9900 |
C14A—C13A | 1.534 (2) | C15B—C14B | 1.529 (2) |
C14A—H15A | 0.9900 | C15B—H34A | 0.9900 |
C14A—H15B | 0.9900 | C15B—H34B | 0.9900 |
C3A—C4A | 1.383 (3) | C16A—H35A | 0.9800 |
C3A—C2A | 1.388 (3) | C16A—H35B | 0.9800 |
C3A—H3A | 0.9500 | C16A—H35C | 0.9800 |
C15A—C16A | 1.525 (3) | C14B—H38A | 0.9900 |
C15A—H17A | 0.9900 | C14B—H38B | 0.9900 |
C15A—H17B | 0.9900 | C3B—H3B | 0.9500 |
C6B—C5B | 1.391 (2) | C12B—H40A | 0.9800 |
C6B—C1B | 1.397 (3) | C12B—H40B | 0.9800 |
C6B—H6B | 0.9500 | C12B—H40C | 0.9800 |
O1A—Pd1—O1B | 86.08 (5) | C4A—C5A—H5A | 120.0 |
O1A—Pd1—Se1B | 178.98 (4) | C6A—C5A—H5A | 120.0 |
O1B—Pd1—Se1B | 93.59 (4) | O1A—C7A—N1A | 130.00 (16) |
O1A—Pd1—Se1A | 93.12 (3) | O1A—C7A—C1A | 114.96 (14) |
O1B—Pd1—Se1A | 177.91 (4) | N1A—C7A—C1A | 115.00 (15) |
Se1B—Pd1—Se1A | 87.244 (8) | C15B—C16B—H25A | 109.5 |
C8A—Se1A—Pd1 | 102.73 (5) | C15B—C16B—H25B | 109.5 |
C8B—Se1B—Pd1 | 103.40 (5) | H25A—C16B—H25B | 109.5 |
C7B—O1B—Pd1 | 132.90 (12) | C15B—C16B—H25C | 109.5 |
C7A—O1A—Pd1 | 132.89 (11) | H25A—C16B—H25C | 109.5 |
C8A—N2A—C13A | 123.06 (14) | H25B—C16B—H25C | 109.5 |
C8A—N2A—C9A | 120.23 (14) | N2B—C13B—C14B | 116.20 (15) |
C13A—N2A—C9A | 116.67 (13) | N2B—C13B—H26A | 108.2 |
N2B—C9B—C10B | 112.65 (14) | C14B—C13B—H26A | 108.2 |
N2B—C9B—H13A | 109.1 | N2B—C13B—H26B | 108.2 |
C10B—C9B—H13A | 109.1 | C14B—C13B—H26B | 108.2 |
N2B—C9B—H13B | 109.1 | H26A—C13B—H26B | 107.4 |
C10B—C9B—H13B | 109.1 | C11A—C12A—H27A | 109.5 |
H13A—C9B—H13B | 107.8 | C11A—C12A—H27B | 109.5 |
C8B—N1B—C7B | 127.02 (15) | H27A—C12A—H27B | 109.5 |
C8B—N2B—C13B | 123.47 (14) | C11A—C12A—H27C | 109.5 |
C8B—N2B—C9B | 120.27 (14) | H27A—C12A—H27C | 109.5 |
C13B—N2B—C9B | 116.21 (14) | H27B—C12A—H27C | 109.5 |
N2A—C9A—C10A | 112.28 (14) | C2B—C1B—C6B | 119.47 (16) |
N2A—C9A—H9AA | 109.1 | C2B—C1B—C7B | 121.12 (16) |
C10A—C9A—H9AA | 109.1 | C6B—C1B—C7B | 119.40 (16) |
N2A—C9A—H9AB | 109.1 | C2A—C1A—C6A | 119.23 (16) |
C10A—C9A—H9AB | 109.1 | C2A—C1A—C7A | 121.03 (15) |
H9AA—C9A—H9AB | 107.9 | C6A—C1A—C7A | 119.73 (15) |
N1A—C8A—N2A | 115.79 (15) | C3A—C4A—C5A | 120.04 (17) |
N1A—C8A—Se1A | 127.55 (12) | C3A—C4A—H4A | 120.0 |
N2A—C8A—Se1A | 116.52 (12) | C5A—C4A—H4A | 120.0 |
C11A—C10A—C9A | 112.05 (15) | C12A—C11A—C10A | 111.80 (15) |
C11A—C10A—H10A | 109.2 | C12A—C11A—H31A | 109.3 |
C9A—C10A—H10A | 109.2 | C10A—C11A—H31A | 109.3 |
C11A—C10A—H11B | 109.2 | C12A—C11A—H31B | 109.3 |
C9A—C10A—H11B | 109.2 | C10A—C11A—H31B | 109.3 |
H10A—C10A—H11B | 107.9 | H31A—C11A—H31B | 107.9 |
C9B—C10B—C11B | 111.40 (15) | C12B—C11B—C10B | 112.47 (16) |
C9B—C10B—H12A | 109.3 | C12B—C11B—H32A | 109.1 |
C11B—C10B—H12A | 109.3 | C10B—C11B—H32A | 109.1 |
C9B—C10B—H12B | 109.3 | C12B—C11B—H32B | 109.1 |
C11B—C10B—H12B | 109.3 | C10B—C11B—H32B | 109.1 |
H12A—C10B—H12B | 108.0 | H32A—C11B—H32B | 107.8 |
N1B—C8B—N2B | 115.72 (14) | N2A—C13A—C14A | 114.31 (14) |
N1B—C8B—Se1B | 128.10 (13) | N2A—C13A—H33A | 108.7 |
N2B—C8B—Se1B | 116.04 (12) | C14A—C13A—H33A | 108.7 |
C3B—C2B—C1B | 120.11 (17) | N2A—C13A—H33B | 108.7 |
C3B—C2B—H2B | 119.9 | C14A—C13A—H33B | 108.7 |
C1B—C2B—H2B | 119.9 | H33A—C13A—H33B | 107.6 |
C15A—C14A—C13A | 111.52 (15) | C16B—C15B—C14B | 113.35 (16) |
C15A—C14A—H15A | 109.3 | C16B—C15B—H34A | 108.9 |
C13A—C14A—H15A | 109.3 | C14B—C15B—H34A | 108.9 |
C15A—C14A—H15B | 109.3 | C16B—C15B—H34B | 108.9 |
C13A—C14A—H15B | 109.3 | C14B—C15B—H34B | 108.9 |
H15A—C14A—H15B | 108.0 | H34A—C15B—H34B | 107.7 |
C4A—C3A—C2A | 120.31 (17) | C15A—C16A—H35A | 109.5 |
C4A—C3A—H3A | 119.8 | C15A—C16A—H35B | 109.5 |
C2A—C3A—H3A | 119.8 | H35A—C16A—H35B | 109.5 |
C16A—C15A—C14A | 114.54 (15) | C15A—C16A—H35C | 109.5 |
C16A—C15A—H17A | 108.6 | H35A—C16A—H35C | 109.5 |
C14A—C15A—H17A | 108.6 | H35B—C16A—H35C | 109.5 |
C16A—C15A—H17B | 108.6 | O1B—C7B—N1B | 130.59 (16) |
C14A—C15A—H17B | 108.6 | O1B—C7B—C1B | 115.43 (15) |
H17A—C15A—H17B | 107.6 | N1B—C7B—C1B | 113.84 (15) |
C5B—C6B—C1B | 120.04 (17) | C13B—C14B—C15B | 109.94 (15) |
C5B—C6B—H6B | 120.0 | C13B—C14B—H38A | 109.7 |
C1B—C6B—H6B | 120.0 | C15B—C14B—H38A | 109.7 |
C3B—C4B—C5B | 120.05 (17) | C13B—C14B—H38B | 109.7 |
C3B—C4B—H4B | 120.0 | C15B—C14B—H38B | 109.7 |
C5B—C4B—H4B | 120.0 | H38A—C14B—H38B | 108.2 |
C5A—C6A—C1A | 120.27 (17) | C4B—C3B—C2B | 120.30 (18) |
C5A—C6A—H6A | 119.9 | C4B—C3B—H3B | 119.8 |
C1A—C6A—H6A | 119.9 | C2B—C3B—H3B | 119.8 |
C3A—C2A—C1A | 120.08 (16) | C11B—C12B—H40A | 109.5 |
C3A—C2A—H2A | 120.0 | C11B—C12B—H40B | 109.5 |
C1A—C2A—H2A | 120.0 | H40A—C12B—H40B | 109.5 |
C4B—C5B—C6B | 120.01 (18) | C11B—C12B—H40C | 109.5 |
C4B—C5B—H5B | 120.0 | H40A—C12B—H40C | 109.5 |
C6B—C5B—H5B | 120.0 | H40B—C12B—H40C | 109.5 |
C4A—C5A—C6A | 120.03 (17) | C7A—N1A—C8A | 127.50 (15) |
O1A—Pd1—Se1A—C8A | −19.43 (6) | C9B—N2B—C13B—C14B | 88.86 (18) |
Se1B—Pd1—Se1A—C8A | 159.62 (5) | C3B—C2B—C1B—C6B | 0.3 (3) |
O1B—Pd1—Se1B—C8B | −15.02 (7) | C3B—C2B—C1B—C7B | 178.85 (16) |
Se1A—Pd1—Se1B—C8B | 163.06 (5) | C5B—C6B—C1B—C2B | 1.0 (3) |
O1A—Pd1—O1B—C7B | −175.66 (17) | C5B—C6B—C1B—C7B | −177.55 (16) |
Se1B—Pd1—O1B—C7B | 5.30 (16) | C3A—C2A—C1A—C6A | 2.3 (3) |
O1B—Pd1—O1A—C7A | −173.48 (16) | C3A—C2A—C1A—C7A | −176.48 (16) |
Se1A—Pd1—O1A—C7A | 8.45 (16) | C5A—C6A—C1A—C2A | −1.3 (3) |
C10B—C9B—N2B—C8B | 89.66 (19) | C5A—C6A—C1A—C7A | 177.48 (16) |
C10B—C9B—N2B—C13B | −93.06 (18) | O1A—C7A—C1A—C2A | 169.17 (16) |
C8A—N2A—C9A—C10A | 86.64 (19) | N1A—C7A—C1A—C2A | −13.0 (2) |
C13A—N2A—C9A—C10A | −91.15 (17) | O1A—C7A—C1A—C6A | −9.6 (2) |
C13A—N2A—C8A—N1A | −178.13 (15) | N1A—C7A—C1A—C6A | 168.28 (16) |
C9A—N2A—C8A—N1A | 4.2 (2) | C2A—C3A—C4A—C5A | −0.6 (3) |
C13A—N2A—C8A—Se1A | 5.8 (2) | C6A—C5A—C4A—C3A | 1.6 (3) |
C9A—N2A—C8A—Se1A | −171.82 (12) | C9A—C10A—C11A—C12A | −174.11 (15) |
Pd1—Se1A—C8A—N1A | 27.98 (16) | C9B—C10B—C11B—C12B | −165.76 (16) |
Pd1—Se1A—C8A—N2A | −156.51 (12) | C8A—N2A—C13A—C14A | −88.3 (2) |
N2A—C9A—C10A—C11A | −176.73 (14) | C9A—N2A—C13A—C14A | 89.43 (18) |
N2B—C9B—C10B—C11B | −174.40 (14) | C15A—C14A—C13A—N2A | 159.16 (14) |
C7B—N1B—C8B—N2B | 166.00 (16) | Pd1—O1B—C7B—N1B | 5.8 (3) |
C7B—N1B—C8B—Se1B | −18.5 (3) | Pd1—O1B—C7B—C1B | −178.88 (11) |
C13B—N2B—C8B—N1B | −173.07 (15) | C8B—N1B—C7B—O1B | −1.3 (3) |
C9B—N2B—C8B—N1B | 4.0 (2) | C8B—N1B—C7B—C1B | −176.65 (16) |
C13B—N2B—C8B—Se1B | 10.8 (2) | C2B—C1B—C7B—O1B | 166.87 (16) |
C9B—N2B—C8B—Se1B | −172.10 (12) | C6B—C1B—C7B—O1B | −14.6 (2) |
Pd1—Se1B—C8B—N1B | 25.37 (17) | C2B—C1B—C7B—N1B | −17.0 (2) |
Pd1—Se1B—C8B—N2B | −159.11 (12) | C6B—C1B—C7B—N1B | 161.51 (16) |
C13A—C14A—C15A—C16A | 61.9 (2) | N2B—C13B—C14B—C15B | 179.84 (15) |
C4A—C3A—C2A—C1A | −1.3 (3) | C16B—C15B—C14B—C13B | 172.77 (15) |
C3B—C4B—C5B—C6B | 0.4 (3) | C5B—C4B—C3B—C2B | 0.9 (3) |
C1B—C6B—C5B—C4B | −1.4 (3) | C1B—C2B—C3B—C4B | −1.3 (3) |
C1A—C6A—C5A—C4A | −0.7 (3) | O1A—C7A—N1A—C8A | −9.0 (3) |
Pd1—O1A—C7A—N1A | 8.8 (3) | C1A—C7A—N1A—C8A | 173.58 (16) |
Pd1—O1A—C7A—C1A | −173.71 (11) | N2A—C8A—N1A—C7A | 169.74 (16) |
C8B—N2B—C13B—C14B | −94.0 (2) | Se1A—C8A—N1A—C7A | −14.7 (3) |
Experimental details
(I) | (II) | |
Crystal data | ||
Chemical formula | C16H24N2OSe | [Pd(C16H23N2OSe)2] |
Mr | 339.33 | 783.05 |
Crystal system, space group | Monoclinic, P21/c | Triclinic, P1 |
Temperature (K) | 273 | 173 |
a, b, c (Å) | 10.3880 (17), 15.715 (3), 10.1518 (16) | 9.9302 (8), 10.9315 (9), 15.4119 (13) |
α, β, γ (°) | 90, 98.423 (3), 90 | 80.216 (1), 88.291 (1), 81.867 (1) |
V (Å3) | 1639.4 (5) | 1632.0 (2) |
Z | 4 | 2 |
Radiation type | Mo Kα | Mo Kα |
µ (mm−1) | 2.29 | 2.83 |
Crystal size (mm) | 0.20 × 0.16 × 0.14 | 0.09 × 0.08 × 0.08 |
Data collection | ||
Diffractometer | Bruker APEX CCD area-detector diffractometer | Bruker APEX CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2002) | Multi-scan (SADABS; Bruker, 2002) |
Tmin, Tmax | 0.651, 0.732 | 0.785, 0.797 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10228, 3775, 3031 | 18809, 7329, 6802 |
Rint | 0.038 | 0.017 |
(sin θ/λ)max (Å−1) | 0.666 | 0.667 |
Refinement | ||
R[F2 > 2σ(F2)], wR(F2), S | 0.037, 0.085, 1.03 | 0.022, 0.056, 1.05 |
No. of reflections | 3775 | 7329 |
No. of parameters | 187 | 374 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.55, −0.33 | 0.55, −0.38 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2002), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), X-SEED (Barbour, 2001).
Se1—C8 | 1.848 (2) | N1—H1 | 0.83 (3) |
O1—C7 | 1.212 (3) | N2—C8 | 1.314 (3) |
C7—N1 | 1.397 (3) | N2—C13 | 1.470 (3) |
C7—C1 | 1.492 (3) | N2—C9 | 1.480 (3) |
N1—C8 | 1.399 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···Se1i | 0.83 (3) | 2.76 (3) | 3.539 (2) | 159 (2) |
C6—H6···O1ii | 0.93 | 2.48 | 3.407 (3) | 173.8 |
Symmetry codes: (i) −x, −y+1, −z+1; (ii) −x, −y+1, −z. |
Pd1—O1A | 2.0395 (12) | N2A—C13A | 1.469 (2) |
Pd1—O1B | 2.0439 (12) | N2A—C9A | 1.478 (2) |
Pd1—Se1B | 2.3411 (3) | C9B—N2B | 1.481 (2) |
Pd1—Se1A | 2.3489 (3) | N1B—C8B | 1.334 (2) |
Se1A—C8A | 1.9076 (17) | N1B—C7B | 1.335 (2) |
Se1B—C8B | 1.9006 (16) | N2B—C8B | 1.338 (2) |
O1B—C7B | 1.260 (2) | N2B—C13B | 1.473 (2) |
O1A—C7A | 1.266 (2) | C8A—N1A | 1.333 (2) |
N2A—C8A | 1.341 (2) | C7A—N1A | 1.329 (2) |
The use of metal complexes in which the ligands contain either S or Se as single-source precursors for the synthesis of semiconducting quantum dots has recently attracted interest (Nair et al., 2005; Malik et al., 2005). In this context, we have recently reported the use of [N,N-diethyl-N'-benzoylthio(seleno)urea]cadmium(II) complexes as single-source precursors for the successful synthesis of CdS and CdSe nanoparticles (Bruce et al., 2007). As part of our interest in extending this study to include other metal ions, we have prepared several N,N-dialkyl-N'-benzoylselenoureas and corresponding metal complexes with a view to using these as single-source precursors for nanoparticle synthesis. The related N,N-dialkyl-N'-benzoylthiourea ligands have been studied extensively and are well known to coordinate to a wide variety of first-row transition metal ions (Schuster & Koenig, 1987; Dietze et al., 1991; Beyer et al., 1981). The corresponding N,N-dialkyl-N'-benzoylselenoureas are relatively rare, although some metal complexes of NiII and PdII derived from N,N-dialkyl-N'-benzoylselenourea have been structurally characterized (Kampf et al., 2004; Bensch & Schuster, 1994). Generally, both N,N-dialkyl-N'-benzoylthioureas and N,N-dialkyl-N'-benzoylselenoureas readily coordinate to metal ions with loss of a thioamidic or selenoamidic H atom, resulting in bidentate coordination through the S(Se) and O donor atoms. Surprisingly, relatively few crystal structures of the unbound ligand N,N-dialkyl-N'-benzoylthiourea and analogous N,N-dialkyl-N'-benzoylselenoureas are available in the literature. We report here the crystal and molecular structures of N,N-dibutyl-N'-benzoylselenourea, HL, (I) (Figs. 1 and 2), and its PdII complex, cis-[Pd(L-Se,O)2], (II) (Fig. 3).
As shown in Fig. 1, compound (I) crystallizes in the space group P21/c. The O and Se donor atoms adopt an anti orientation relative to each other as a result of twisting about the N1—C8 bond, to give torsion angles O1—C7—N1—C8 = 0.5 (4)° and C7—N1—C8—Se1 = 121.1 (2)°. The C—N bonds are all shorter than the average C—N bond length of 1.472 (5) Å (Reference for standard value?) (Table 1); the alkyl-substituted selenourea C—N bond [C8—N2 = 1.316 (3) Å] is significantly shorter than the amide [C7—N1 = 1.397 (3) Å] and acyl-substituted selenourea C—N bond [C8—N1 = 1.399 (3) Å]. This reflects the trend observed in the sulfur analogues, where N,N-dibutyl-N'-naphthoylthiourea (Koch et al., 1995) and, more recently, N-acetyl-N',N'-(butane-1,4-diyl)thiourea (Dillen et al., 2006a) and N,N-di-n-butyl-N'-pivaloylthiourea (Dillen et al., 2006b), show that the R,RN—C(S) bond length is, on average, the shortest, followed by the amidic R'C(O)—N bond, while the HN—C(S) thiourea bond is the longest. Moreover, these molecules usually adopt a conformation in the solid state such that the donor atoms S and O assume opposing orientations, the molecule being usually significantly twisted around the longest HN—C(S) thiourea bond.
As shown in Fig. 2, the molecules of (I) are linked through a hydrogen bond between the selenoamidic H atom of one molecule and the Se atom of its neighbour at (-x, 1 - y, 1 - z), with N—H····Se = 2.756 Å, N···Se = 3.538 (2) Å and Se···H—N = 159°, so giving rise to a dimer linked through such hydrogen bonds in the crystal structure. The formation of this dimer represents an example of resonance-assisted hydrogen bonding (RAHB) or π-bond cooperativity (Steiner, 2002) since, in terms of hydrogen bonding, the selenourea moiety consists of donor–acceptor pairs which are connected by a resonant π system, manifested by the shortening of the amide and acyl-substituted C—N bonds. Such an arrangement is also observed in the closely related diethyl analogue, N,N-diethyl-N'-benzoylselenourea (Bruce et al., 2007). This dimer forms an eight-membered ring structure where the atoms H1/N1/C8/Se1/H1i/N1i/C8i/Se1i [symmetry code: (i) -x, 1 - y, 1 - z] lie in a plane with a maximum deviation of 0.119 (2) Å for atom H1. A second dimeric hydrogen bond is present in (I) between the carbonyl O atom and an H atom on the benzene residue at (-x, 1 - y, -z), with C6—H6.·O1 = 2.481 Å, C6.·O1 = 3.407 (3) Å and O1···H6—C6 = 173.7°. Similarly to the first dimer, this forms a ten-membered ring structure where the atoms O1/C7/C1/C6/H6/O1ii/C7ii/C1ii/C6ii/H6ii [symmetry code: (ii) -x, 1 - y, -z] again lie in a plane, with a maximum deviation of 0.241 (2) Å for atom O1, the angle between these two planes being 82.36 (2)°. It is interesting to note that the second hydrogen bond is not evident in the solid-state structures of other N,N-dialkyl-N'-benzoylselenoureas that have previously been analysed (N,N-dihexyl-N'-benzoylselenourea, N,N-dioctyl-N'-benzoylselenourea and N-benzyl-N-methyl-N'-benzoylselenourea; Bruce & Koch, 2007). These two dimers give rise to the hydrogen-bonded chains shown in Fig. 2 that form in the direction of the c axis. There is little interaction apparent between these chains.
The molecular structure of cis-[Pd(L-Se,O)2], (II), which crystallizes in the space group P1, is shown in Fig. 3. The generally expected mode of coordination of HL with loss of an H atom, yielding a cis-square-planar complex, is observed. The four donor atoms and Pd metal centre lie in a single coordination plane involving atoms Se1A/O1A/Pd1/Se1B/O1B, with a deviation from planarity of only 0.024 Å [Is this the mean or the maximum deviation? If the latter, please state the atom involved]; the two chelate rings are twisted at an angle of 4.6 (1)° relative to each other, and deviate slightly from perfect planarity by 0.096 and 0.085 Å for atoms Se1A/C8A/N1A/C7A/O1A and Se1B/C8B/N1B/C7B/O1B, respectively. The reduced planarity in the chelate rings is reflected in a puckering of the C7A/N1A/C8A and the C7B/N1B/C8B planes, with atoms N1A and N1B, respectively, lying 0.486 (2) Å below and 0.336 (2) Å above the Se1A/O1A/Pd1/Se1B/O1B plane.
The average Pd—Se and Pd—O bond lengths of 2.345 (3) and 2.041 (1) Å, respectively (Table 3), in (II) compare well with those reported previously for bis[N,N-diisobutyl-N'-(2-fluoro)benzoylselenoureato]palladium(II) (Kampf et al., 2004) and its difluoro analogue, bis[N,N-diisobutyl-N'-(2,6-difluoro)benzoylselenoureato]palladium(II) (Kampf et al., 2005). The C═O and C═Se bonds in (II) are somewhat longer than the corresponding bonds in the ligand HL, as a result of a slight loss of double-bond character in these bonds, presumably due to electron delocalization in the six-membered chelate ring of the metal complex. The relative reduction in the C═Se bond order of (I) on coordination to PdII in the complex is also reflected by a significant reduction of the 1J(77Se-13C) coupling constant, from 222 Hz in the ligand to 177 Hz in (II), in the 13C NMR spectra of these substances in CDCl3. The electron delocalization in the chelate ring of (II) is, in turn, shown by the slight shortening of the C—N bond lengths compared with the corresponding bonds in the unbound ligand.