The coordination polymers
catena-poly[[[(4,4'-bi-1,2,4-triazole-
N1)bis(thiocyanato-
N)copper(II)]-
-4,4'-bi-1,2,4-triazole-
2N1:
N1'] dihydrate], {[Cu(NCS)
2(C
4H
4N
6)
2]·2H
2O}
n, (I), and poly[tetrakis(
-4,4'-bi-1,2,4-triazole-
2N1:
N1')bis(
-thiocyanato-
2N:
S)tetrakis(thiocyanato-
N)tricadmium(II)], [Cd
3(NCS)
6(C
4H
4N
6)
4]
n, (II), exhibit chain and two-dimensional layer structures, respectively. The differentiation of the Lewis acidic nature of Cu
II and Cd
II has an influence on the coordination modes of the triazole and thiocyanate ligands, leading to topologically different polymeric motifs. In (I), copper ions are linked by bitriazole
N:
N'-bridges into zigzag chains and the tetragonal-pyramidal CuN
5 environment is composed of two thiocyanate N atoms and three triazole N atoms [basal Cu-N = 1.9530 (18)-2.0390 (14) Å and apical Cu-N = 2.2637 (15) Å]. The structure of (II) contains two types of crystallographically unique Cd
II atoms. One type lies on an inversion center in a distorted CdN
6 octahedral environment, with bitriazole ligands in the equatorial plane and terminal isothiocyanate N atoms in the axial positions. The other type lies on a general position and forms centrosymmetric binuclear [Cd
2(
-NCS-
2N:
S)
2(NCS)
2] units (tetragonal-pyramidal CdN
4S coordination).
N:
N'-Bridging bitriazole ligands link the Cd centers into a flat (4,4)-network.
Supporting information
CCDC references: 682792; 682793
All materials were of reagent grade and were used as received. The btr ligand
was prepared according to the reported procedure (Bartlett et al.,
1967). The precipitate obtained by mixing aqueous CuSO4·5H2O (0.0250 g, 0.100 mmol), CsSCN (0.0382 g, 0.200 mmol) and btr (0.0136 g, 0.100 mmol)
solutions was recrystallized from water to afford green prisms of (I) (yield
83%). Evaporation of an aqueous solution (3 ml) of Cd(SCN)2 (0.0457 g, 0.200 mmol) and btr (0.0136 g, 0.100 mmol) in a desiccator over CaCl2 for a few
days afforded colorless prisms of (II) (yield 98%).######
All H atoms were located in difference maps and included as riding atoms, with
O—H distances constrained to 0.85 Å and C—H distances constrained to
0.94 Å, and with Uiso(H) values of 1.2Ueq(C) and
1.5Ueq(O).
Data collection: IPDS Software (Stoe & Cie, 2000) for (I); CAD-4 EXPRESS (Enraf–Nonius, 1994) for (II). Cell refinement: IPDS Software (Stoe & Cie, 2000) for (I); CAD-4 EXPRESS (Enraf–Nonius, 1994) for (II). Data reduction: IPDS Software (Stoe & Cie, 2000) for (I); XCAD4 (Harms & Wocadlo, 1995) for (II). For both compounds, program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999). Software used to prepare material for publication: WinGX (Version 1.700.00; Farrugia, 1999) for (I); SHELXL97 (Sheldrick, 2008) for (II).
(I)
catena-poly[[(4,4'-bi-1,2,4-triazole-
κN1)bis(thiocyanato-
κN)copper(II)]-
µ-4,4'-bi-1,2,4-triazole-
κ2N1:
N1' dihydrate]
top
Crystal data top
[Cu(NCS)2(C4H4N6)2]·2H2O | Dx = 1.713 Mg m−3 |
Mr = 488.00 | Mo Kα radiation, λ = 0.71073 Å |
Orthorhombic, P212121 | Cell parameters from 8000 reflections |
a = 6.9047 (4) Å | θ = 1.9–28.0° |
b = 12.5332 (9) Å | µ = 1.42 mm−1 |
c = 21.8652 (18) Å | T = 213 K |
V = 1892.2 (2) Å3 | Prism, green |
Z = 4 | 0.20 × 0.18 × 0.18 mm |
F(000) = 988 | |
Data collection top
Stoe IPDS diffractometer | 4019 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.043 |
Graphite monochromator | θmax = 28.0°, θmin = 1.9° |
ϕ oscillation scans | h = −8→8 |
18528 measured reflections | k = −16→16 |
4417 independent reflections | l = −28→28 |
Refinement top
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.022 | H-atom parameters constrained |
wR(F2) = 0.052 | w = 1/[σ2(Fo2) + (0.0307P)2] where P = (Fo2 + 2Fc2)/3 |
S = 0.95 | (Δ/σ)max = 0.001 |
4417 reflections | Δρmax = 0.26 e Å−3 |
262 parameters | Δρmin = −0.24 e Å−3 |
0 restraints | Absolute structure: Flack (1983), 1806 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.001 (8) |
Crystal data top
[Cu(NCS)2(C4H4N6)2]·2H2O | V = 1892.2 (2) Å3 |
Mr = 488.00 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 6.9047 (4) Å | µ = 1.42 mm−1 |
b = 12.5332 (9) Å | T = 213 K |
c = 21.8652 (18) Å | 0.20 × 0.18 × 0.18 mm |
Data collection top
Stoe IPDS diffractometer | 4019 reflections with I > 2σ(I) |
18528 measured reflections | Rint = 0.043 |
4417 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.022 | H-atom parameters constrained |
wR(F2) = 0.052 | Δρmax = 0.26 e Å−3 |
S = 0.95 | Δρmin = −0.24 e Å−3 |
4417 reflections | Absolute structure: Flack (1983), 1806 Friedel pairs |
262 parameters | Absolute structure parameter: −0.001 (8) |
0 restraints | |
Special details top
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
Cu1 | 0.40468 (3) | 0.220250 (15) | 0.831398 (9) | 0.01950 (5) | |
S1 | 0.79981 (9) | 0.09578 (5) | 0.68072 (3) | 0.03784 (13) | |
S2 | −0.13170 (9) | 0.26397 (5) | 0.96452 (3) | 0.04031 (14) | |
O1 | 0.6274 (4) | 0.94852 (15) | 1.03402 (10) | 0.0701 (7) | |
H1W | 0.5809 | 0.8858 | 1.0353 | 0.105* | |
H2W | 0.6482 | 0.9643 | 0.9968 | 0.105* | |
O2 | 0.7618 (4) | 0.01984 (15) | 0.91451 (11) | 0.0643 (6) | |
H3W | 0.7561 | 0.0841 | 0.9268 | 0.097* | |
H4W | 0.6810 | 0.0121 | 0.8855 | 0.097* | |
N1 | 0.3141 (2) | 0.06553 (11) | 0.82787 (8) | 0.0241 (3) | |
N2 | 0.4377 (2) | −0.02263 (11) | 0.83130 (8) | 0.0255 (3) | |
N3 | 0.1425 (2) | −0.07576 (11) | 0.81393 (7) | 0.0218 (3) | |
N4 | −0.2701 (3) | −0.24093 (12) | 0.81414 (7) | 0.0264 (4) | |
N5 | −0.2307 (2) | −0.22949 (12) | 0.75148 (7) | 0.0246 (3) | |
N6 | −0.0146 (3) | −0.14111 (12) | 0.80226 (7) | 0.0227 (3) | |
N7 | 0.5203 (3) | 0.36161 (12) | 0.85532 (7) | 0.0217 (3) | |
N8 | 0.6754 (3) | 0.41012 (13) | 0.82639 (8) | 0.0326 (4) | |
N9 | 0.6022 (3) | 0.49857 (11) | 0.90889 (7) | 0.0239 (3) | |
N10 | 0.6811 (3) | 0.64115 (16) | 1.04494 (8) | 0.0407 (5) | |
N11 | 0.5754 (3) | 0.71456 (14) | 1.01082 (8) | 0.0378 (4) | |
N12 | 0.6122 (3) | 0.57128 (12) | 0.95664 (7) | 0.0255 (3) | |
N13 | 0.6402 (3) | 0.17816 (13) | 0.78821 (8) | 0.0288 (4) | |
N14 | 0.1825 (3) | 0.24998 (13) | 0.88514 (8) | 0.0298 (4) | |
C1 | 0.1385 (3) | 0.03238 (14) | 0.81808 (9) | 0.0266 (4) | |
H1 | 0.0279 | 0.0757 | 0.8145 | 0.032* | |
C2 | 0.3286 (3) | −0.10618 (14) | 0.82260 (9) | 0.0255 (4) | |
H2 | 0.3727 | −0.1771 | 0.8224 | 0.031* | |
C3 | −0.1371 (3) | −0.18731 (15) | 0.84297 (8) | 0.0268 (4) | |
H3 | −0.1272 | −0.1814 | 0.8857 | 0.032* | |
C4 | −0.0788 (3) | −0.17001 (14) | 0.74566 (8) | 0.0273 (4) | |
H4 | −0.0217 | −0.1499 | 0.7084 | 0.033* | |
C5 | 0.4781 (3) | 0.41586 (14) | 0.90471 (8) | 0.0234 (4) | |
H5 | 0.3784 | 0.3999 | 0.9325 | 0.028* | |
C6 | 0.7224 (4) | 0.49264 (17) | 0.85969 (10) | 0.0359 (5) | |
H6 | 0.8236 | 0.5405 | 0.8510 | 0.043* | |
C7 | 0.7026 (4) | 0.55633 (18) | 1.01149 (10) | 0.0361 (5) | |
H7 | 0.7699 | 0.4944 | 1.0232 | 0.043* | |
C8 | 0.5355 (4) | 0.67114 (16) | 0.95857 (10) | 0.0340 (5) | |
H8 | 0.4647 | 0.7036 | 0.9269 | 0.041* | |
C9 | 0.7048 (3) | 0.14259 (14) | 0.74378 (9) | 0.0248 (4) | |
C10 | 0.0517 (3) | 0.25614 (14) | 0.91798 (8) | 0.0256 (4) | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
Cu1 | 0.01990 (11) | 0.01771 (9) | 0.02089 (9) | −0.00181 (8) | 0.00063 (9) | −0.00212 (8) |
S1 | 0.0364 (3) | 0.0397 (3) | 0.0374 (3) | 0.0022 (2) | 0.0087 (2) | −0.0123 (2) |
S2 | 0.0360 (4) | 0.0467 (3) | 0.0382 (3) | 0.0068 (2) | 0.0163 (2) | 0.0070 (2) |
O1 | 0.0974 (19) | 0.0427 (10) | 0.0704 (13) | 0.0047 (11) | −0.0371 (14) | −0.0124 (9) |
O2 | 0.0622 (15) | 0.0491 (11) | 0.0817 (15) | −0.0008 (10) | −0.0313 (12) | −0.0055 (10) |
N1 | 0.0220 (9) | 0.0172 (6) | 0.0331 (8) | −0.0026 (5) | −0.0033 (7) | −0.0001 (6) |
N2 | 0.0207 (9) | 0.0222 (6) | 0.0336 (8) | −0.0018 (6) | −0.0036 (7) | −0.0005 (7) |
N3 | 0.0227 (10) | 0.0181 (7) | 0.0247 (7) | −0.0051 (6) | −0.0048 (6) | −0.0005 (5) |
N4 | 0.0269 (10) | 0.0273 (8) | 0.0250 (7) | −0.0052 (6) | 0.0008 (6) | −0.0005 (6) |
N5 | 0.0266 (9) | 0.0242 (7) | 0.0229 (7) | −0.0049 (7) | −0.0021 (6) | −0.0002 (7) |
N6 | 0.0219 (9) | 0.0222 (7) | 0.0240 (8) | −0.0076 (6) | −0.0042 (6) | −0.0023 (6) |
N7 | 0.0245 (9) | 0.0189 (7) | 0.0218 (7) | −0.0023 (6) | 0.0007 (6) | −0.0030 (6) |
N8 | 0.0390 (11) | 0.0279 (8) | 0.0309 (9) | −0.0113 (7) | 0.0149 (8) | −0.0082 (8) |
N9 | 0.0260 (9) | 0.0220 (7) | 0.0238 (7) | −0.0035 (7) | 0.0031 (7) | −0.0073 (5) |
N10 | 0.0497 (14) | 0.0435 (10) | 0.0290 (9) | −0.0039 (9) | −0.0021 (9) | −0.0108 (8) |
N11 | 0.0473 (13) | 0.0311 (8) | 0.0350 (8) | −0.0018 (9) | 0.0000 (8) | −0.0152 (7) |
N12 | 0.0290 (10) | 0.0227 (7) | 0.0246 (7) | −0.0013 (7) | −0.0001 (7) | −0.0090 (6) |
N13 | 0.0263 (11) | 0.0226 (7) | 0.0374 (9) | −0.0014 (7) | 0.0072 (7) | −0.0040 (7) |
N14 | 0.0274 (10) | 0.0336 (9) | 0.0284 (8) | −0.0064 (7) | 0.0061 (7) | −0.0053 (6) |
C1 | 0.0269 (12) | 0.0204 (8) | 0.0326 (10) | −0.0012 (7) | −0.0035 (8) | −0.0003 (7) |
C2 | 0.0246 (11) | 0.0204 (8) | 0.0315 (10) | −0.0005 (7) | −0.0013 (8) | −0.0002 (7) |
C3 | 0.0302 (12) | 0.0272 (8) | 0.0230 (9) | −0.0063 (7) | −0.0005 (7) | −0.0002 (7) |
C4 | 0.0315 (12) | 0.0291 (9) | 0.0213 (8) | −0.0071 (9) | −0.0027 (9) | −0.0002 (7) |
C5 | 0.0258 (11) | 0.0212 (8) | 0.0232 (8) | −0.0018 (7) | 0.0029 (7) | −0.0028 (7) |
C6 | 0.0398 (15) | 0.0300 (10) | 0.0378 (12) | −0.0121 (9) | 0.0161 (10) | −0.0097 (9) |
C7 | 0.0454 (16) | 0.0337 (11) | 0.0293 (11) | 0.0014 (10) | −0.0060 (10) | −0.0044 (9) |
C8 | 0.0464 (15) | 0.0246 (9) | 0.0309 (10) | 0.0019 (9) | −0.0032 (10) | −0.0051 (8) |
C9 | 0.0229 (11) | 0.0175 (8) | 0.0339 (10) | 0.0002 (7) | −0.0005 (9) | 0.0005 (7) |
C10 | 0.0284 (12) | 0.0261 (9) | 0.0222 (8) | −0.0018 (7) | −0.0032 (7) | 0.0005 (7) |
Geometric parameters (Å, º) top
Cu1—N13 | 1.9530 (18) | N6—C4 | 1.364 (2) |
Cu1—N14 | 1.9678 (18) | N7—C5 | 1.309 (2) |
Cu1—N7 | 2.0124 (15) | N7—N8 | 1.385 (2) |
Cu1—N1 | 2.0390 (14) | N8—C6 | 1.306 (3) |
Cu1—N5i | 2.2637 (15) | N9—C5 | 1.348 (2) |
S1—C9 | 1.636 (2) | N9—C6 | 1.361 (3) |
S2—C10 | 1.627 (2) | N9—N12 | 1.387 (2) |
O1—H1W | 0.8500 | N10—C7 | 1.299 (3) |
O1—H2W | 0.8500 | N10—N11 | 1.391 (3) |
O2—H3W | 0.8500 | N11—C8 | 1.295 (3) |
O2—H4W | 0.8500 | N12—C8 | 1.359 (3) |
N1—C1 | 1.299 (3) | N12—C7 | 1.365 (3) |
N1—N2 | 1.398 (2) | N13—C9 | 1.158 (3) |
N2—C2 | 1.304 (2) | N14—C10 | 1.157 (3) |
N3—C2 | 1.354 (3) | C1—H1 | 0.9400 |
N3—C1 | 1.359 (2) | C2—H2 | 0.9400 |
N3—N6 | 1.383 (2) | C3—H3 | 0.9400 |
N4—C3 | 1.301 (3) | C4—H4 | 0.9400 |
N4—N5 | 1.404 (2) | C5—H5 | 0.9400 |
N5—C4 | 1.293 (3) | C6—H6 | 0.9400 |
N5—Cu1ii | 2.2637 (15) | C7—H7 | 0.9400 |
N6—C3 | 1.358 (3) | C8—H8 | 0.9400 |
| | | |
N13—Cu1—N14 | 171.45 (8) | C7—N10—N11 | 107.43 (18) |
N13—Cu1—N7 | 91.90 (7) | C8—N11—N10 | 107.86 (17) |
N14—Cu1—N7 | 89.27 (7) | C8—N12—C7 | 106.08 (16) |
N13—Cu1—N1 | 88.87 (7) | C8—N12—N9 | 127.49 (17) |
N14—Cu1—N1 | 87.91 (7) | C7—N12—N9 | 126.42 (17) |
N7—Cu1—N1 | 165.65 (7) | C9—N13—Cu1 | 146.11 (18) |
N13—Cu1—N5i | 97.47 (7) | C10—N14—Cu1 | 172.84 (16) |
N14—Cu1—N5i | 90.67 (7) | N1—C1—N3 | 108.12 (17) |
N7—Cu1—N5i | 100.00 (6) | N1—C1—H1 | 125.9 |
N1—Cu1—N5i | 94.09 (6) | N3—C1—H1 | 125.9 |
H1W—O1—H2W | 108.1 | N2—C2—N3 | 110.04 (16) |
H3W—O2—H4W | 108.3 | N2—C2—H2 | 125.0 |
C1—N1—N2 | 109.01 (15) | N3—C2—H2 | 125.0 |
C1—N1—Cu1 | 126.63 (13) | N4—C3—N6 | 110.02 (16) |
N2—N1—Cu1 | 124.20 (12) | N4—C3—H3 | 125.0 |
C2—N2—N1 | 105.91 (15) | N6—C3—H3 | 125.0 |
C2—N3—C1 | 106.91 (16) | N5—C4—N6 | 109.11 (17) |
C2—N3—N6 | 127.12 (15) | N5—C4—H4 | 125.4 |
C1—N3—N6 | 125.96 (17) | N6—C4—H4 | 125.4 |
C3—N4—N5 | 106.45 (16) | N7—C5—N9 | 108.31 (17) |
C4—N5—N4 | 108.19 (15) | N7—C5—H5 | 125.8 |
C4—N5—Cu1ii | 120.80 (12) | N9—C5—H5 | 125.8 |
N4—N5—Cu1ii | 130.53 (12) | N8—C6—N9 | 109.40 (19) |
C3—N6—C4 | 106.22 (16) | N8—C6—H6 | 125.3 |
C3—N6—N3 | 128.33 (16) | N9—C6—H6 | 125.3 |
C4—N6—N3 | 125.44 (17) | N10—C7—N12 | 109.3 (2) |
C5—N7—N8 | 108.72 (15) | N10—C7—H7 | 125.4 |
C5—N7—Cu1 | 125.70 (14) | N12—C7—H7 | 125.4 |
N8—N7—Cu1 | 125.07 (12) | N11—C8—N12 | 109.36 (19) |
C6—N8—N7 | 106.58 (16) | N11—C8—H8 | 125.3 |
C5—N9—C6 | 106.98 (15) | N12—C8—H8 | 125.3 |
C5—N9—N12 | 126.01 (17) | N13—C9—S1 | 178.21 (18) |
C6—N9—N12 | 126.89 (17) | N14—C10—S2 | 179.5 (2) |
| | | |
N13—Cu1—N1—C1 | −140.90 (18) | N7—Cu1—N13—C9 | −132.5 (3) |
N14—Cu1—N1—C1 | 47.02 (18) | N1—Cu1—N13—C9 | 61.8 (3) |
N7—Cu1—N1—C1 | 125.8 (3) | N5i—Cu1—N13—C9 | −32.2 (3) |
N5i—Cu1—N1—C1 | −43.49 (18) | N2—N1—C1—N3 | −1.0 (2) |
N13—Cu1—N1—N2 | 34.10 (15) | Cu1—N1—C1—N3 | 174.67 (13) |
N14—Cu1—N1—N2 | −137.97 (16) | C2—N3—C1—N1 | 0.9 (2) |
N7—Cu1—N1—N2 | −59.2 (4) | N6—N3—C1—N1 | −178.35 (17) |
N5i—Cu1—N1—N2 | 131.51 (15) | N1—N2—C2—N3 | −0.1 (2) |
C1—N1—N2—C2 | 0.7 (2) | C1—N3—C2—N2 | −0.5 (2) |
Cu1—N1—N2—C2 | −175.09 (14) | N6—N3—C2—N2 | 178.76 (17) |
C3—N4—N5—C4 | −0.3 (2) | N5—N4—C3—N6 | 0.5 (2) |
C3—N4—N5—Cu1ii | −172.24 (14) | C4—N6—C3—N4 | −0.4 (2) |
C2—N3—N6—C3 | 90.5 (3) | N3—N6—C3—N4 | 178.33 (17) |
C1—N3—N6—C3 | −90.4 (3) | N4—N5—C4—N6 | 0.0 (2) |
C2—N3—N6—C4 | −91.0 (3) | Cu1ii—N5—C4—N6 | 172.90 (12) |
C1—N3—N6—C4 | 88.1 (3) | C3—N6—C4—N5 | 0.2 (2) |
N13—Cu1—N7—C5 | −150.32 (17) | N3—N6—C4—N5 | −178.59 (17) |
N14—Cu1—N7—C5 | 21.21 (18) | N8—N7—C5—N9 | −0.1 (2) |
N1—Cu1—N7—C5 | −57.4 (4) | Cu1—N7—C5—N9 | 172.04 (13) |
N5i—Cu1—N7—C5 | 111.75 (17) | C6—N9—C5—N7 | 0.1 (2) |
N13—Cu1—N7—N8 | 20.63 (16) | N12—N9—C5—N7 | −176.06 (18) |
N14—Cu1—N7—N8 | −167.84 (16) | N7—N8—C6—N9 | −0.1 (3) |
N1—Cu1—N7—N8 | 113.5 (3) | C5—N9—C6—N8 | 0.0 (3) |
N5i—Cu1—N7—N8 | −77.29 (16) | N12—N9—C6—N8 | 176.12 (19) |
C5—N7—N8—C6 | 0.2 (2) | N11—N10—C7—N12 | −0.7 (3) |
Cu1—N7—N8—C6 | −172.07 (16) | C8—N12—C7—N10 | 0.5 (3) |
C7—N10—N11—C8 | 0.7 (3) | N9—N12—C7—N10 | −179.6 (2) |
C5—N9—N12—C8 | −99.4 (3) | N10—N11—C8—N12 | −0.3 (3) |
C6—N9—N12—C8 | 85.2 (3) | C7—N12—C8—N11 | −0.1 (3) |
C5—N9—N12—C7 | 80.8 (3) | N9—N12—C8—N11 | −179.9 (2) |
C6—N9—N12—C7 | −94.6 (3) | | |
Symmetry codes: (i) −x, y+1/2, −z+3/2; (ii) −x, y−1/2, −z+3/2. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1W···N11 | 0.85 | 2.21 | 2.997 (3) | 154 |
O1—H2W···O2iii | 0.85 | 2.08 | 2.914 (3) | 166 |
O2—H3W···S2iv | 0.85 | 2.52 | 3.331 (2) | 159 |
O2—H4W···N2 | 0.85 | 2.10 | 2.933 (3) | 166 |
Symmetry codes: (iii) x, y+1, z; (iv) x+1, y, z. |
(II) poly[bis(µ-thiocyanato-
κ2N:
S)tetrakis(thiocyanato-
κN)tetrakis(µ-4,4'-
bi-1,2,4-triazole-
κ2N1:
N1')tricadmium(II)]
top
Crystal data top
[Cd3(NCS)6(C4H4N6)4] | Z = 1 |
Mr = 1230.21 | F(000) = 598 |
Triclinic, P1 | Dx = 2.026 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.092 (1) Å | Cell parameters from 22 reflections |
b = 10.4867 (18) Å | θ = 12.1–17.8° |
c = 13.836 (2) Å | µ = 1.94 mm−1 |
α = 87.440 (18)° | T = 298 K |
β = 81.158 (16)° | Prism, colorless |
γ = 82.847 (11)° | 0.40 × 0.25 × 0.12 mm |
V = 1008.5 (3) Å3 | |
Data collection top
Enraf–Nonius CAD-4 diffractometer | 3813 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.024 |
Graphite monochromator | θmax = 28.0°, θmin = 2.0° |
non–profiled ω–2θ scans | h = 0→9 |
Absorption correction: ψ scan (North et al., 1968) | k = −13→13 |
Tmin = 0.511, Tmax = 0.800 | l = −18→18 |
5237 measured reflections | 3 standard reflections every 120 min |
4853 independent reflections | intensity decay: none |
Refinement top
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)] = 0.030 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.074 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.037P)2 + 0.079P] where P = (Fo2 + 2Fc2)/3 |
4853 reflections | (Δ/σ)max = 0.001 |
277 parameters | Δρmax = 0.59 e Å−3 |
0 restraints | Δρmin = −0.63 e Å−3 |
Crystal data top
[Cd3(NCS)6(C4H4N6)4] | γ = 82.847 (11)° |
Mr = 1230.21 | V = 1008.5 (3) Å3 |
Triclinic, P1 | Z = 1 |
a = 7.092 (1) Å | Mo Kα radiation |
b = 10.4867 (18) Å | µ = 1.94 mm−1 |
c = 13.836 (2) Å | T = 298 K |
α = 87.440 (18)° | 0.40 × 0.25 × 0.12 mm |
β = 81.158 (16)° | |
Data collection top
Enraf–Nonius CAD-4 diffractometer | 3813 reflections with I > 2σ(I) |
Absorption correction: ψ scan (North et al., 1968) | Rint = 0.024 |
Tmin = 0.511, Tmax = 0.800 | 3 standard reflections every 120 min |
5237 measured reflections | intensity decay: none |
4853 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.030 | 0 restraints |
wR(F2) = 0.074 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.59 e Å−3 |
4853 reflections | Δρmin = −0.63 e Å−3 |
277 parameters | |
Special details top
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
Cd1 | 0.74354 (3) | 0.37189 (2) | 0.409603 (15) | 0.02879 (7) | |
Cd2 | 0.0000 | 0.0000 | 0.0000 | 0.02410 (8) | |
S1 | 0.44852 (19) | −0.32200 (10) | 0.14859 (8) | 0.0595 (3) | |
S2 | 1.14967 (16) | −0.04039 (12) | 0.33967 (11) | 0.0635 (3) | |
S3 | 1.05782 (13) | 0.46097 (9) | 0.69250 (6) | 0.03770 (19) | |
N1 | 0.4891 (4) | 0.2901 (3) | 0.51075 (19) | 0.0366 (6) | |
N2 | 0.3557 (5) | 0.2315 (4) | 0.4704 (2) | 0.0563 (10) | |
N3 | 0.3515 (4) | 0.1684 (3) | 0.62208 (17) | 0.0291 (5) | |
N4 | 0.3156 (4) | 0.0950 (2) | 0.70704 (17) | 0.0283 (5) | |
N5 | 0.1980 (4) | 0.0290 (3) | 0.85035 (19) | 0.0333 (6) | |
N6 | 0.3276 (4) | −0.0699 (3) | 0.8073 (2) | 0.0387 (7) | |
N7 | 0.6982 (4) | 0.3887 (3) | 0.19224 (18) | 0.0317 (6) | |
N8 | 0.5744 (4) | 0.3779 (3) | 0.27976 (18) | 0.0302 (6) | |
N9 | 0.4234 (4) | 0.3403 (2) | 0.16256 (17) | 0.0258 (5) | |
N10 | 0.2841 (4) | 0.3071 (2) | 0.11294 (18) | 0.0264 (5) | |
N11 | 0.1116 (4) | 0.1904 (3) | 0.04664 (19) | 0.0314 (6) | |
N12 | 0.0499 (4) | 0.3191 (3) | 0.02676 (19) | 0.0322 (6) | |
N13 | 0.2451 (5) | −0.1146 (3) | 0.0635 (2) | 0.0452 (7) | |
N14 | 0.9291 (6) | 0.1925 (4) | 0.3776 (3) | 0.0641 (10) | |
N15 | 0.8231 (5) | 0.4194 (4) | 0.5548 (2) | 0.0513 (9) | |
C1 | 0.4844 (4) | 0.2503 (3) | 0.6014 (2) | 0.0311 (7) | |
H1 | 0.5614 | 0.2749 | 0.6452 | 0.037* | |
C2 | 0.2750 (6) | 0.1589 (4) | 0.5384 (2) | 0.0524 (11) | |
H2 | 0.1787 | 0.1076 | 0.5312 | 0.063* | |
C3 | 0.1929 (5) | 0.1262 (3) | 0.7895 (2) | 0.0350 (7) | |
H3 | 0.1163 | 0.2055 | 0.8008 | 0.042* | |
C4 | 0.3938 (5) | −0.0277 (3) | 0.7209 (3) | 0.0387 (8) | |
H4 | 0.4829 | −0.0753 | 0.6747 | 0.046* | |
C5 | 0.6043 (4) | 0.3643 (3) | 0.1238 (2) | 0.0299 (6) | |
H5 | 0.6537 | 0.3632 | 0.0568 | 0.036* | |
C6 | 0.4110 (4) | 0.3484 (3) | 0.2609 (2) | 0.0283 (6) | |
H6 | 0.3032 | 0.3352 | 0.3074 | 0.034* | |
C7 | 0.2519 (5) | 0.1862 (3) | 0.0968 (2) | 0.0347 (7) | |
H7 | 0.3208 | 0.1108 | 0.1186 | 0.042* | |
C8 | 0.1557 (4) | 0.3861 (3) | 0.0677 (2) | 0.0309 (6) | |
H8 | 0.1454 | 0.4764 | 0.0663 | 0.037* | |
C9 | 0.3274 (5) | −0.2004 (3) | 0.1001 (2) | 0.0316 (7) | |
C10 | 1.0222 (5) | 0.0961 (4) | 0.3610 (2) | 0.0382 (8) | |
C11 | 0.9227 (5) | 0.4352 (3) | 0.6101 (2) | 0.0355 (7) | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
Cd1 | 0.02856 (12) | 0.03616 (14) | 0.02446 (11) | −0.01177 (10) | −0.00723 (8) | 0.00183 (9) |
Cd2 | 0.02865 (15) | 0.02530 (15) | 0.02016 (14) | −0.00849 (12) | −0.00617 (11) | 0.00327 (11) |
S1 | 0.0860 (8) | 0.0392 (5) | 0.0544 (6) | 0.0126 (5) | −0.0307 (6) | 0.0032 (4) |
S2 | 0.0403 (5) | 0.0506 (6) | 0.0990 (9) | 0.0011 (5) | −0.0085 (6) | −0.0191 (6) |
S3 | 0.0413 (5) | 0.0449 (5) | 0.0318 (4) | −0.0181 (4) | −0.0121 (3) | 0.0057 (3) |
N1 | 0.0338 (14) | 0.0518 (18) | 0.0283 (13) | −0.0206 (13) | −0.0074 (11) | 0.0084 (12) |
N2 | 0.061 (2) | 0.092 (3) | 0.0277 (14) | −0.051 (2) | −0.0154 (14) | 0.0186 (16) |
N3 | 0.0301 (13) | 0.0384 (15) | 0.0202 (11) | −0.0133 (11) | −0.0031 (9) | 0.0069 (10) |
N4 | 0.0306 (13) | 0.0324 (14) | 0.0216 (11) | −0.0088 (11) | −0.0011 (10) | 0.0057 (10) |
N5 | 0.0401 (15) | 0.0331 (14) | 0.0268 (13) | −0.0100 (12) | −0.0023 (11) | 0.0036 (11) |
N6 | 0.0457 (17) | 0.0319 (15) | 0.0351 (14) | −0.0044 (13) | 0.0021 (12) | 0.0073 (12) |
N7 | 0.0316 (14) | 0.0383 (15) | 0.0273 (12) | −0.0114 (12) | −0.0061 (10) | 0.0014 (11) |
N8 | 0.0315 (13) | 0.0384 (15) | 0.0229 (12) | −0.0092 (11) | −0.0077 (10) | 0.0013 (10) |
N9 | 0.0283 (12) | 0.0272 (13) | 0.0242 (12) | −0.0065 (10) | −0.0095 (10) | 0.0004 (9) |
N10 | 0.0295 (13) | 0.0231 (12) | 0.0296 (12) | −0.0057 (10) | −0.0122 (10) | 0.0001 (9) |
N11 | 0.0370 (14) | 0.0282 (13) | 0.0326 (13) | −0.0084 (11) | −0.0129 (11) | −0.0007 (10) |
N12 | 0.0307 (13) | 0.0332 (14) | 0.0350 (14) | −0.0057 (11) | −0.0116 (11) | 0.0014 (11) |
N13 | 0.0476 (18) | 0.0438 (18) | 0.0463 (17) | 0.0010 (15) | −0.0202 (14) | 0.0026 (14) |
N14 | 0.069 (3) | 0.052 (2) | 0.073 (3) | 0.0107 (19) | −0.027 (2) | −0.0078 (19) |
N15 | 0.058 (2) | 0.070 (2) | 0.0351 (16) | −0.0385 (18) | −0.0091 (14) | −0.0026 (15) |
C1 | 0.0305 (15) | 0.0382 (18) | 0.0269 (14) | −0.0117 (13) | −0.0065 (12) | 0.0048 (12) |
C2 | 0.056 (2) | 0.084 (3) | 0.0261 (16) | −0.044 (2) | −0.0120 (16) | 0.0114 (17) |
C3 | 0.0389 (18) | 0.0356 (17) | 0.0266 (15) | −0.0011 (14) | 0.0029 (13) | 0.0039 (13) |
C4 | 0.0439 (19) | 0.0346 (18) | 0.0345 (17) | −0.0020 (15) | 0.0015 (14) | 0.0007 (14) |
C5 | 0.0322 (16) | 0.0331 (16) | 0.0254 (14) | −0.0091 (13) | −0.0038 (12) | −0.0004 (12) |
C6 | 0.0291 (15) | 0.0339 (16) | 0.0236 (13) | −0.0065 (13) | −0.0068 (11) | −0.0007 (11) |
C7 | 0.0425 (18) | 0.0260 (16) | 0.0402 (17) | −0.0064 (13) | −0.0190 (14) | 0.0002 (13) |
C8 | 0.0315 (16) | 0.0255 (15) | 0.0374 (16) | −0.0042 (12) | −0.0104 (13) | 0.0015 (12) |
C9 | 0.0367 (17) | 0.0331 (17) | 0.0265 (14) | −0.0051 (14) | −0.0079 (12) | −0.0033 (12) |
C10 | 0.0339 (17) | 0.049 (2) | 0.0352 (17) | −0.0096 (16) | −0.0119 (14) | 0.0002 (15) |
C11 | 0.0414 (18) | 0.0387 (18) | 0.0288 (15) | −0.0198 (15) | −0.0002 (13) | −0.0005 (13) |
Geometric parameters (Å, º) top
Cd1—N14 | 2.178 (4) | N5—Cd2v | 2.347 (3) |
Cd1—N15 | 2.261 (3) | N6—C4 | 1.294 (4) |
Cd1—N8 | 2.303 (2) | N7—C5 | 1.289 (4) |
Cd1—N1 | 2.335 (3) | N7—N8 | 1.391 (3) |
Cd1—S3i | 2.6142 (10) | N8—C6 | 1.302 (4) |
Cd2—N13 | 2.256 (3) | N9—C6 | 1.356 (4) |
Cd2—N13ii | 2.256 (3) | N9—C5 | 1.361 (4) |
Cd2—N5iii | 2.347 (3) | N9—N10 | 1.373 (3) |
Cd2—N5iv | 2.347 (3) | N10—C7 | 1.350 (4) |
Cd2—N11 | 2.386 (3) | N10—C8 | 1.359 (4) |
Cd2—N11ii | 2.386 (3) | N11—C7 | 1.293 (4) |
S1—C9 | 1.625 (3) | N11—N12 | 1.395 (4) |
S2—C10 | 1.609 (4) | N12—C8 | 1.294 (4) |
S3—C11 | 1.649 (3) | N13—C9 | 1.152 (4) |
S3—Cd1i | 2.6142 (10) | N14—C10 | 1.148 (5) |
N1—C1 | 1.300 (4) | N15—C11 | 1.148 (4) |
N1—N2 | 1.386 (4) | C1—H1 | 0.9400 |
N2—C2 | 1.292 (4) | C2—H2 | 0.9400 |
N3—C1 | 1.344 (4) | C3—H3 | 0.9400 |
N3—C2 | 1.365 (4) | C4—H4 | 0.9400 |
N3—N4 | 1.384 (3) | C5—H5 | 0.9400 |
N4—C3 | 1.351 (4) | C6—H6 | 0.9400 |
N4—C4 | 1.354 (4) | C7—H7 | 0.9400 |
N5—C3 | 1.293 (4) | C8—H8 | 0.9400 |
N5—N6 | 1.387 (4) | | |
| | | |
N14—Cd1—N15 | 101.05 (14) | C6—N8—Cd1 | 139.2 (2) |
N14—Cd1—N8 | 98.51 (12) | N7—N8—Cd1 | 109.84 (18) |
N15—Cd1—N8 | 159.79 (13) | C6—N9—C5 | 106.4 (2) |
N14—Cd1—N1 | 98.97 (14) | C6—N9—N10 | 126.4 (2) |
N15—Cd1—N1 | 82.24 (10) | C5—N9—N10 | 127.1 (2) |
N8—Cd1—N1 | 89.75 (9) | C7—N10—C8 | 105.9 (2) |
N14—Cd1—S3i | 101.73 (12) | C7—N10—N9 | 125.9 (3) |
N15—Cd1—S3i | 95.07 (8) | C8—N10—N9 | 128.2 (2) |
N8—Cd1—S3i | 85.87 (7) | C7—N11—N12 | 108.2 (3) |
N1—Cd1—S3i | 159.25 (8) | C7—N11—Cd2 | 122.0 (2) |
N13—Cd2—N13ii | 180.0 | N12—N11—Cd2 | 129.83 (18) |
N13—Cd2—N5iii | 88.62 (11) | C8—N12—N11 | 106.3 (2) |
N13ii—Cd2—N5iii | 91.38 (11) | C9—N13—Cd2 | 158.1 (3) |
N13—Cd2—N5iv | 91.38 (11) | C10—N14—Cd1 | 178.0 (4) |
N13ii—Cd2—N5iv | 88.62 (11) | C11—N15—Cd1 | 157.0 (3) |
N5iii—Cd2—N5iv | 180.0 | N1—C1—N3 | 108.9 (3) |
N13—Cd2—N11 | 88.09 (11) | N1—C1—H1 | 125.6 |
N13ii—Cd2—N11 | 91.91 (11) | N3—C1—H1 | 125.6 |
N5iii—Cd2—N11 | 94.85 (9) | N2—C2—N3 | 109.4 (3) |
N5iv—Cd2—N11 | 85.15 (9) | N2—C2—H2 | 125.3 |
N13—Cd2—N11ii | 91.91 (11) | N3—C2—H2 | 125.3 |
N13ii—Cd2—N11ii | 88.09 (11) | N5—C3—N4 | 108.8 (3) |
N5iii—Cd2—N11ii | 85.15 (9) | N5—C3—H3 | 125.6 |
N5iv—Cd2—N11ii | 94.85 (9) | N4—C3—H3 | 125.6 |
N11—Cd2—N11ii | 180.0 | N6—C4—N4 | 110.0 (3) |
C11—S3—Cd1i | 97.73 (11) | N6—C4—H4 | 125.0 |
C1—N1—N2 | 108.2 (3) | N4—C4—H4 | 125.0 |
C1—N1—Cd1 | 127.3 (2) | N7—C5—N9 | 110.3 (3) |
N2—N1—Cd1 | 120.2 (2) | N7—C5—H5 | 124.8 |
C2—N2—N1 | 107.0 (3) | N9—C5—H5 | 124.8 |
C1—N3—C2 | 106.5 (3) | N8—C6—N9 | 108.0 (3) |
C1—N3—N4 | 127.0 (2) | N8—C6—H6 | 126.0 |
C2—N3—N4 | 126.0 (3) | N9—C6—H6 | 126.0 |
C3—N4—C4 | 106.3 (3) | N11—C7—N10 | 109.4 (3) |
C3—N4—N3 | 128.4 (3) | N11—C7—H7 | 125.3 |
C4—N4—N3 | 125.2 (3) | N10—C7—H7 | 125.3 |
C3—N5—N6 | 108.6 (3) | N12—C8—N10 | 110.2 (3) |
C3—N5—Cd2v | 128.8 (2) | N12—C8—H8 | 124.9 |
N6—N5—Cd2v | 122.09 (19) | N10—C8—H8 | 124.9 |
C4—N6—N5 | 106.4 (3) | N13—C9—S1 | 178.2 (3) |
C5—N7—N8 | 106.2 (2) | N14—C10—S2 | 178.8 (4) |
C6—N8—N7 | 109.0 (2) | N15—C11—S3 | 177.6 (4) |
| | | |
N14—Cd1—N1—C1 | 75.6 (3) | C7—N11—N12—C8 | −0.9 (4) |
N15—Cd1—N1—C1 | −24.4 (3) | Cd2—N11—N12—C8 | −179.8 (2) |
N8—Cd1—N1—C1 | 174.2 (3) | N5iii—Cd2—N13—C9 | 56.1 (8) |
S3i—Cd1—N1—C1 | −108.2 (3) | N5iv—Cd2—N13—C9 | −123.9 (8) |
N14—Cd1—N1—N2 | −78.2 (3) | N11—Cd2—N13—C9 | 151.0 (8) |
N15—Cd1—N1—N2 | −178.3 (3) | N11ii—Cd2—N13—C9 | −29.0 (8) |
N8—Cd1—N1—N2 | 20.3 (3) | N14—Cd1—N15—C11 | 49.6 (8) |
S3i—Cd1—N1—N2 | 97.9 (3) | N8—Cd1—N15—C11 | −145.2 (7) |
C1—N1—N2—C2 | 0.2 (5) | N1—Cd1—N15—C11 | 147.3 (8) |
Cd1—N1—N2—C2 | 158.6 (3) | S3i—Cd1—N15—C11 | −53.4 (8) |
C1—N3—N4—C3 | 90.0 (4) | N2—N1—C1—N3 | −0.4 (4) |
C2—N3—N4—C3 | −99.0 (5) | Cd1—N1—C1—N3 | −156.8 (2) |
C1—N3—N4—C4 | −93.5 (4) | C2—N3—C1—N1 | 0.5 (4) |
C2—N3—N4—C4 | 77.6 (5) | N4—N3—C1—N1 | 172.9 (3) |
C3—N5—N6—C4 | −0.8 (4) | N1—N2—C2—N3 | 0.1 (5) |
Cd2v—N5—N6—C4 | 171.6 (2) | C1—N3—C2—N2 | −0.3 (5) |
C5—N7—N8—C6 | −0.5 (4) | N4—N3—C2—N2 | −172.9 (3) |
C5—N7—N8—Cd1 | 166.8 (2) | N6—N5—C3—N4 | −0.1 (4) |
N14—Cd1—N8—C6 | 97.4 (4) | Cd2v—N5—C3—N4 | −171.8 (2) |
N15—Cd1—N8—C6 | −67.8 (5) | C4—N4—C3—N5 | 0.8 (4) |
N1—Cd1—N8—C6 | −1.6 (4) | N3—N4—C3—N5 | 177.9 (3) |
S3i—Cd1—N8—C6 | −161.3 (3) | N5—N6—C4—N4 | 1.3 (4) |
N14—Cd1—N8—N7 | −64.0 (2) | C3—N4—C4—N6 | −1.3 (4) |
N15—Cd1—N8—N7 | 130.7 (3) | N3—N4—C4—N6 | −178.5 (3) |
N1—Cd1—N8—N7 | −163.0 (2) | N8—N7—C5—N9 | 1.1 (4) |
S3i—Cd1—N8—N7 | 37.30 (19) | C6—N9—C5—N7 | −1.4 (4) |
C6—N9—N10—C7 | −83.6 (4) | N10—N9—C5—N7 | −178.0 (3) |
C5—N9—N10—C7 | 92.4 (4) | N7—N8—C6—N9 | −0.4 (4) |
C6—N9—N10—C8 | 98.7 (4) | Cd1—N8—C6—N9 | −161.8 (2) |
C5—N9—N10—C8 | −85.3 (4) | C5—N9—C6—N8 | 1.0 (3) |
N13—Cd2—N11—C7 | −5.5 (3) | N10—N9—C6—N8 | 177.7 (3) |
N13ii—Cd2—N11—C7 | 174.6 (3) | N12—N11—C7—N10 | 1.2 (4) |
N5iii—Cd2—N11—C7 | 83.0 (3) | Cd2—N11—C7—N10 | −179.8 (2) |
N5iv—Cd2—N11—C7 | −97.0 (3) | C8—N10—C7—N11 | −1.0 (4) |
N13—Cd2—N11—N12 | 173.3 (3) | N9—N10—C7—N11 | −179.1 (3) |
N13ii—Cd2—N11—N12 | −6.7 (3) | N11—N12—C8—N10 | 0.2 (3) |
N5iii—Cd2—N11—N12 | −98.2 (3) | C7—N10—C8—N12 | 0.5 (4) |
N5iv—Cd2—N11—N12 | 81.8 (3) | N9—N10—C8—N12 | 178.5 (3) |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x, −y, −z; (iii) −x, −y, −z+1; (iv) x, y, z−1; (v) x, y, z+1. |
Experimental details
| (I) | (II) |
Crystal data |
Chemical formula | [Cu(NCS)2(C4H4N6)2]·2H2O | [Cd3(NCS)6(C4H4N6)4] |
Mr | 488.00 | 1230.21 |
Crystal system, space group | Orthorhombic, P212121 | Triclinic, P1 |
Temperature (K) | 213 | 298 |
a, b, c (Å) | 6.9047 (4), 12.5332 (9), 21.8652 (18) | 7.092 (1), 10.4867 (18), 13.836 (2) |
α, β, γ (°) | 90, 90, 90 | 87.440 (18), 81.158 (16), 82.847 (11) |
V (Å3) | 1892.2 (2) | 1008.5 (3) |
Z | 4 | 1 |
Radiation type | Mo Kα | Mo Kα |
µ (mm−1) | 1.42 | 1.94 |
Crystal size (mm) | 0.20 × 0.18 × 0.18 | 0.40 × 0.25 × 0.12 |
|
Data collection |
Diffractometer | Stoe IPDS diffractometer | Enraf–Nonius CAD-4 diffractometer |
Absorption correction | – | ψ scan (North et al., 1968) |
Tmin, Tmax | – | 0.511, 0.800 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 18528, 4417, 4019 | 5237, 4853, 3813 |
Rint | 0.043 | 0.024 |
(sin θ/λ)max (Å−1) | 0.660 | 0.660 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.022, 0.052, 0.95 | 0.030, 0.074, 1.05 |
No. of reflections | 4417 | 4853 |
No. of parameters | 262 | 277 |
H-atom treatment | H-atom parameters constrained | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.26, −0.24 | 0.59, −0.63 |
Absolute structure | Flack (1983), 1806 Friedel pairs | ? |
Absolute structure parameter | −0.001 (8) | ? |
Selected geometric parameters (Å, º) for (I) topCu1—N13 | 1.9530 (18) | Cu1—N1 | 2.0390 (14) |
Cu1—N14 | 1.9678 (18) | Cu1—N5i | 2.2637 (15) |
Cu1—N7 | 2.0124 (15) | | |
| | | |
N13—Cu1—N14 | 171.45 (8) | N13—Cu1—N1 | 88.87 (7) |
N13—Cu1—N7 | 91.90 (7) | N14—Cu1—N1 | 87.91 (7) |
N14—Cu1—N7 | 89.27 (7) | N7—Cu1—N1 | 165.65 (7) |
| | | |
C1—N3—N6—C4 | 88.1 (3) | C6—N9—N12—C8 | 85.2 (3) |
Symmetry code: (i) −x, y+1/2, −z+3/2. |
Hydrogen-bond geometry (Å, º) for (I) top
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1W···N11 | 0.850 | 2.212 | 2.997 (3) | 153.7 |
O1—H2W···O2ii | 0.850 | 2.082 | 2.914 (3) | 165.6 |
O2—H3W···S2iii | 0.850 | 2.522 | 3.331 (2) | 159.4 |
O2—H4W···N2 | 0.850 | 2.102 | 2.933 (3) | 165.7 |
Symmetry codes: (ii) x, y+1, z; (iii) x+1, y, z. |
Selected geometric parameters (Å, º) for (II) topCd1—N14 | 2.178 (4) | Cd1—S3i | 2.6142 (10) |
Cd1—N15 | 2.261 (3) | Cd2—N13 | 2.256 (3) |
Cd1—N8 | 2.303 (2) | Cd2—N5ii | 2.347 (3) |
Cd1—N1 | 2.335 (3) | Cd2—N11 | 2.386 (3) |
| | | |
N14—Cd1—N15 | 101.05 (14) | N8—Cd1—S3i | 85.87 (7) |
N14—Cd1—N8 | 98.51 (12) | N1—Cd1—S3i | 159.25 (8) |
N15—Cd1—N8 | 159.79 (13) | N13—Cd2—N5ii | 91.38 (11) |
N14—Cd1—N1 | 98.97 (14) | N5ii—Cd2—N11 | 85.15 (9) |
N15—Cd1—N1 | 82.24 (10) | N13—Cd2—N11iii | 91.91 (11) |
N8—Cd1—N1 | 89.75 (9) | | |
| | | |
C6—N9—N10—C7 | −83.6 (4) | | |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) x, y, z−1; (iii) −x, −y, −z. |
The growing interest in the structural design of MII–bi(1,2,4-triazole) coordination polymers (where M = FeII, CuII and CdII) has been dictated by their importance in the fields of magnetism and fluorescence (Janiak, 2000). The bitopic bitriazoles propagate local coordination environments around either discrete metal ions or polynuclear secondary building units (SBU) as nodes, forming metal-organic frameworks (MOFs). The adjacent N atoms (N1 and N2) in 1,2,4-triazole derivatives are well suited for binding together transition metal cations, leading to characteristic polynuclear clusters, viz. dimers (Drabent et al., 2004), linear (Liu et al., 1999) and triangular trimers (Virovets et al., 1997), etc. Recently, for the CuII–btr–X- (X = Cl and Br; btr is 4,4'-bi-1,2,4-triazole) systems, we have demonstrated how such cluster motifs may be rationally integrated in the MOFs (Lysenko et al., 2006, 2007). Obviously, the nature of the anion is a crucial factor that determines the resultant structure and net topology of the MII–btr polymers. In this context, a very interesting situation could be realised in the case of pseudohalide anions, e.g. NCS-, which are complementary to a short triazole linker, and such a combination of neutral and anionic bridges can support formation of triangular CuII {[Cu3(µ3-OH)(µ2-L)4(H2O)(NCS)3](ClO4)2·H2O; Liu et al., 2003} as well as linear trinuclear CdII cores {[{Cd3(µ2-L)4(µ2-NCS)2}(µ2-NCS)2(NCS)2]; L is 4-amino-3,5-dimethyltriazole; Yi et al., 2004}. We report here the crystal structures of two new coordination polymers, [Cu(btr)2(NCS)2](H2O)2, (I), and [Cd3(btr)4(NCS)6], (II), that build on these ideas.
In (I), the Cu1 centers are located in general positions and possess a distorted tetragonal–pyramidal environment of five N atoms. The basal sites of the pyramid are occupied by two terminal trans-coordinated isothiocyanate groups and one N atom each from one terminal and one N1,N1'-bidentate btr molecule, while the apical position is occupied by the other N atom of the bidentate btr ligand (Fig. 1 and Table 1). These Cu—NNCS bond lengths are slightly shorter than those observed in the similar five-coordinate complexes Cu(3-methylpyridine)3(NCS)2 [1.973 (9) and 2.194 (13) Å] and Cu(3,4-dimethylpyridine)3(NCS)2 [1.981 (13) and 2.215 (17) Å; Kabesova & Koziskova, 1989].
The N,N'-bidentate btr molecules link the adjacent Cu atoms [related by the symmetry operation (-x, y + 1/2, -z + 3/2)] at a distance of 9.1198 (5) Å. Their cis-location around the metal center leads to the formation of zigzag [Cu(µ2-btr)]n2n+ chains running along the b axis (Fig. 2), with corresponding Cu···Cu···Cu angles of 86.81 (1)° and separations between the translating units (x, y + 1, z) of 12.5332 (9) Å. The neighboring chains, which are related by translation along the a axis, afford tight packing with a closest Cu1···Cu1(x + 1, y, z) distance of 6.9047 (4) Å. The N1,N1'-coordination mode of btr is widely found (Vreugdenhil et al., 1985); however, the polymeric motif with two kinds of mono- and bidentate-coordinated btr molecules similar to (I) is uncommon. The only structural precedent is [Mn(µ2-btr)(btr)2(H2O)(NCS)]NCS (Zilverentant et al., 1998).
The noncoordinated water molecules in (I) are involved in hydrogen-bonding interactions with each other [O1···O2ii = 2.899 (0) Å; symmetry code: (ii) x, y + 1, z] (Fig. 2). This `dimer' can be considered as a donor of two hydrogen bonds towards two btr molecules [O1···N11 = 2.997 (3) Å and O2···N2 = 2.933 (3) Å) with one weak hydrogen bond towards the S atom of an NCS- anion [O1···S2iii = 3.331 (2) Å; symmetry code: (iii) x + 1, y, z] (Table 2) (Desiraju & Steiner, 1999). These interactions lead to interconnection of the coordination chains into two-dimensional hydrogen-bonded layers aligned parallel to the bc plane.
The Lewis softness of the Cd2+ centers in (II) and their higher affinity towards NCS- anions either as N– or as S-atom donors effects the formation of an even more complicated polymeric motif, as compared with the copper(II) complex. The structure of (II) involves two types of coordination environments (Fig. 3). Two equivalent Cd1 ions [related by the symmetry operation (i) (-x + 2, -y + 1, -z + 1)] are linked by a pair of thiocyanate-N,S bridges into centrosymmetric dimers and the distorted tetragonal–pyramidal N4S environment of the Cd1 center is completed with two triazole-N donors and a terminal thiocyanate-N group in the apical position (Fig. 4). Within these double bridged Cd2(µ2-NCS)2 dimers the Cd···Cd distance [5.7044 (9) Å] is similar to those observed in the related complex [N(C3H7)4][Cd(µ2-NCS)2(NCS)] (5.715 and 5.856 Å; Taniguchi & Ouch, 1989). The eight-membered Cd2(µ2-NCS)2 cycle possesses a "chair" conformation (displacement of the Cd1 atom out of the (NCS)2 plane is 0.544 Å), and two terminal NCS- anions are attached to the Cd1 ions at the opposite sides of the metallocycle. This Cd2(µ2-NCS)2(NCS)2 arrangement is scarcely found and has only two precedents in [{Cd3(µ2-tr)4(µ2-Cl)2}(µ2-NCS)2(NCS)2]·2H2O (tr is 4-amino-3,5-diethyltriazole) (Yi et al., 2004) and (N(C3H7)4)[Cd(µ2-NCS)2(NCS)] (Taniguchi & Ouch, 1989), with octahedral and tetragonal–pyramidal metal atoms, respectively.
The coordination environment of the second unique Cd ion is much simpler. Atom Cd2 is located on a center of inversion and has a slightly distorted octahedral environment involving four triazole N-donors in the equatorial plane and two isothiocyanates in the axial positions (Table 3).
Each (Cd1)2(µ-NCS)2 moiety and discrete Cd2 ion coordinates four triazole groups and this predetermines parity of their structural functions: both of them (in a 1:1 proportion) provide four-connected nodes for a planar (4,4)-network and the corresponding diagonal Cd2···Cd2iv [symmetry code: (iv) x, y, 1 + z] separations are 13.836 Å (c parameter of the unit cell) (Figs. 3 and 4). Adjacent layers are shifted and stacked at a distance of 5.20 Å. The terminal coordinating isothiocyanates containing atoms S1 and S2 are directed inside the pores of the adjacent layer (x + 1, y, z) to afford interdigitation of the successive nets.
In both structures, the btr molecules display almost orthogonal orientation of two triazole groups, which does not depend upon coordination modes of the ligand. The dihedral angles between the planes of the triazole heterocycles lie in the range 77.58 (4)–89.99 (4)°, in good agreement with those reported for the free 4,4'-bi-1,2,4-triazole [88.12 (1)°; Domiano, 1977].
These results demonstrate that the btr molecule in combination with the nucleophilic isothiocyanate anion (N-terminal and N,S-bidentate roles) as coligand adopts monodentate and N1,N1'-bidentate coordination behavior toward CuII and CdII, leading to formation of low-dimensional coordination polymers.