metal-organic compounds
Chlorido(dimethyl sulfoxide-κS)[2-(2-pyridyl)phenyl-κ2N,C1]platinum(II)
aDepartment of Chemistry, Faculty of Science, Kyushu University, Hakozaki 6-10-1, Higashi-ku, Fukuoka 812-8581, Japan
*Correspondence e-mail: ksakai@chem.kyushu-univ.jp
In the title compound, [Pt(C11H8N)Cl(C2H6OS)], the S atom of dimethyl sulfoxide is trans to the pyridyl N atom [Pt—S = 2.2181 (11) Å] and the chlorido ligand is trans to the carbon donor of 2-(2-pyridyl)phenyl [Pt—Cl = 2.4202 (10) Å]. The [2-(2-pyridyl)phenyl]platinum(II) unit forms a one-dimensional stack along the c axis with two independent interplanar separations of 3.44 (9) and 3.50 (2) Å.
Related literature
For background information, see: Herber et al. (1994); Mdleleni et al. (1995); Newman et al. (2007); Ozawa et al. (2006, 2007); Sakai & Ozawa (2007); Sakai et al. (1993); Ozawa & Sakai (2007); Kobayashi et al. (2008).
Experimental
Crystal data
|
Data collection: APEX2 (Bruker, 2006); cell APEX2; data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: KENX (Sakai, 2004); software used to prepare material for publication: SHELXL97, TEXSAN (Molecular Structure Corporation, 2001), KENX and ORTEPII (Johnson, 1976).
Supporting information
10.1107/S1600536808030109/at2633sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808030109/at2633Isup2.hkl
A mixture of cis-PtCl2(DMSO)2 (0.21 g, 0.50 mmol) and 2-phenylpyridine (0.078 g, 0.50 mmol) in methanol (10 ml) was sealed in a pressure-resistant vial and was stirred at 393 K for 3 h. After the solution was cooled down to room temperature, the yellow precipitate of compound (I) was filtrated and dried in vacuo (Caution! Do not open the vial while it is hot, since the solution splashes out because of the violent boiling phenomenon upon a sudden decrease in pressure). Yield: 0.14 g (60%). Analysis calculated for C13H14ClNOPtS: C 33.73, H 3.05, N 3.03. Found: C 33.95, H 2.99, N 3.02. 1H NMR (300.53 MHz, acetone-d6), p.p.m.: δ 9.63 [d, J = 5.97 Hz, 3J(195Pt-1H) = 17.8 Hz, 1H], 8.37 [d, J = 6.81 Hz, 3J(195Pt-1H) = 22.8 Hz, 1H], 8.16–8.06 (m, 2H), 7.25 (d, J = 6.46 Hz), 7.48 (t, J = 6.43 Hz), 7.20–7.11 (m, 2H), 3.63 [s, 3J(195Pt-1H) = 12.2 Hz, 6H]. A good quality single-crystal was prepared by diffusion of methanol into a DMSO solution of (I).
All H atoms were placed in idealized positions (methyl C—H = 0.98 Å and aromatic C—H = 0.95 Å), and included in the
in a riding-model approximation, with Uiso(H) = 1.5Ueq(methyl C) and Uiso(H) = 1.2Ueq(aromatic C). In the final difference Fourier map, the highest peak was located 0.83 Å from atom Pt1. The deepest hole was located 1.07 Å from atom H9.Data collection: APEX2 (Bruker, 2006); cell
APEX2 (Bruker, 2006); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: KENX (Sakai, 2004); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008), TEXSAN (Molecular Structure Corporation, 2001), KENX (Sakai, 2004) and ORTEPII (Johnson, 1976).[Pt(C11H8N)Cl(C2H6OS)] | F(000) = 1744 |
Mr = 462.85 | Dx = 2.363 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 3936 reflections |
a = 22.414 (3) Å | θ = 2.5–27.9° |
b = 10.0205 (16) Å | µ = 11.14 mm−1 |
c = 14.057 (2) Å | T = 100 K |
β = 124.512 (2)° | Prisms, yellow |
V = 2601.6 (7) Å3 | 0.09 × 0.08 × 0.04 mm |
Z = 8 |
Bruker SMART APEX CCD-detector diffractometer | 2850 independent reflections |
Radiation source: rotating anode with a mirror focusing unit | 2448 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.018 |
ϕ and ω scans | θmax = 27.1°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −28→28 |
Tmin = 0.486, Tmax = 0.640 | k = −12→9 |
7004 measured reflections | l = −18→15 |
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)] = 0.023 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.064 | H-atom parameters constrained |
S = 1.11 | w = 1/[σ2(Fo2) + (0.0295P)2 + 15.2156P] where P = (Fo2 + 2Fc2)/3 |
2850 reflections | (Δ/σ)max = 0.002 |
165 parameters | Δρmax = 2.05 e Å−3 |
0 restraints | Δρmin = −1.43 e Å−3 |
[Pt(C11H8N)Cl(C2H6OS)] | V = 2601.6 (7) Å3 |
Mr = 462.85 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 22.414 (3) Å | µ = 11.14 mm−1 |
b = 10.0205 (16) Å | T = 100 K |
c = 14.057 (2) Å | 0.09 × 0.08 × 0.04 mm |
β = 124.512 (2)° |
Bruker SMART APEX CCD-detector diffractometer | 2850 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2448 reflections with I > 2σ(I) |
Tmin = 0.486, Tmax = 0.640 | Rint = 0.018 |
7004 measured reflections |
R[F2 > 2σ(F2)] = 0.023 | 0 restraints |
wR(F2) = 0.064 | H-atom parameters constrained |
S = 1.11 | w = 1/[σ2(Fo2) + (0.0295P)2 + 15.2156P] where P = (Fo2 + 2Fc2)/3 |
2850 reflections | Δρmax = 2.05 e Å−3 |
165 parameters | Δρmin = −1.43 e Å−3 |
Experimental. The first 50 frames were rescanned at the end of data collection to evaluate any possible decay phenomenon. Since it was judged to be negligible, no decay correction was applied to the data. |
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. Least-squares planes (x,y,z in crystal coordinates) and deviations from them (* indicates atom used to define plane) -14.3368 (0.0269) x - 0.3580 (0.0127) y + 13.9887 (0.0034) z = 5.0906 (0.0091) * 0.0000 (0.0001) N1 * -0.0003 (0.0009) C11 * -0.0002 (0.0007) Cl1 * 0.0004 (0.0015) Pt1 - 0.0669 (0.0049) S1 - 0.0453 (0.0077) O1 Rms deviation of fitted atoms = 0.0003 -15.0609 (0.0266) x - 0.5670 (0.0181) y + 13.9054 (0.0039) z = 4.9585 (0.0082) Angle to previous plane (with approximate e.s.d.) = 2.77 (0.16) * -0.0032 (0.0026) N1 * 0.0072 (0.0030) C1 * -0.0025 (0.0030) C2 * -0.0058 (0.0029) C3 * 0.0096 (0.0029) C4 * -0.0052 (0.0027) C5 - 0.1020 (0.0055) Pt1 Rms deviation of fitted atoms = 0.0061 -14.3427 (0.0315) x - 0.4723 (0.0194) y + 13.9812 (0.0035) z = 5.0095 (0.0158) Angle to previous plane (with approximate e.s.d.) = 2.52 (0.18) * -0.0053 (0.0030) C6 * 0.0050 (0.0034) C7 * 0.0011 (0.0036) C8 * -0.0071 (0.0033) C9 * 0.0068 (0.0030) C10 * -0.0006 (0.0029) C11 0.0196 (0.0064) Pt1 Rms deviation of fitted atoms = 0.0050 -14.3368 (0.0269) x - 0.3580 (0.0127) y + 13.9887 (0.0034) z = 5.0906 (0.0091) Angle to previous plane (with approximate e.s.d.) = 0.66 (0.17) * 0.0000 (0.0001) N1 * -0.0003 (0.0009) C11 * -0.0002 (0.0007) Cl1 * 0.0004 (0.0015) Pt1 - 0.0669 (0.0049) S1 - 0.0453 (0.0077) O1 Rms deviation of fitted atoms = 0.0003 -14.6775 (0.0205) x - 0.4790 (0.0073) y + 13.9524 (0.0028) z = 4.9852 (0.0045) Angle to previous plane (with approximate e.s.d.) = 1.36 (0.14) * 0.0328 (0.0031) N1 * 0.0226 (0.0035) C1 * -0.0212 (0.0037) C2 * -0.0380 (0.0034) C3 * -0.0016 (0.0037) C4 * 0.0177 (0.0038) C5 * 0.0052 (0.0039) C6 * 0.0303 (0.0041) C7 * 0.0139 (0.0042) C8 * -0.0215 (0.0039) C9 * -0.0223 (0.0033) C10 * -0.0180 (0.0035) C11 - 3.4480 (0.0042) N1_$1 - 3.3136 (0.0062) C1_$1 - 3.5267 (0.0045) C5_$1 - 3.4606 (0.0029) Pt1_$1 Rms deviation of fitted atoms = 0.0228 -14.6775 (0.0205) x - 0.4790 (0.0073) y + 13.9524 (0.0028) z = 4.9852 (0.0045) Angle to previous plane (with approximate e.s.d.) = 0.00 (0.12) * 0.0328 (0.0031) N1 * 0.0226 (0.0035) C1 * -0.0212 (0.0037) C2 * -0.0380 (0.0034) C3 * -0.0016 (0.0037) C4 * 0.0177 (0.0038) C5 * 0.0052 (0.0039) C6 * 0.0303 (0.0041) C7 * 0.0139 (0.0042) C8 * -0.0215 (0.0039) C9 * -0.0223 (0.0033) C10 * -0.0180 (0.0035) C11 3.4700 (0.0040) N1_$2 3.4803 (0.0050) C1_$2 3.5240 (0.0050) C2_$2 3.4851 (0.0048) C5_$2 3.4977 (0.0053) C6_$2 3.5252 (0.0047) C10_$2 3.5209 (0.0046) C11_$2 3.5174 (0.0022) Pt1_$2 Rms deviation of fitted atoms = 0.0228 |
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 | ||
Pt1 | 0.121378 (8) | 0.501904 (14) | 0.501179 (13) | 0.01100 (7) | |
Cl1 | 0.16776 (5) | 0.27601 (10) | 0.54289 (9) | 0.0177 (2) | |
S1 | 0.23482 (5) | 0.57296 (10) | 0.61446 (9) | 0.0135 (2) | |
O1 | 0.25415 (16) | 0.7153 (3) | 0.6395 (3) | 0.0207 (7) | |
N1 | 0.01517 (18) | 0.4393 (4) | 0.3907 (3) | 0.0130 (7) | |
C1 | −0.0056 (2) | 0.3097 (4) | 0.3637 (4) | 0.0188 (9) | |
H1 | 0.0298 | 0.2412 | 0.4003 | 0.023* | |
C2 | −0.0769 (2) | 0.2759 (4) | 0.2843 (4) | 0.0198 (9) | |
H2 | −0.0905 | 0.1849 | 0.2656 | 0.024* | |
C3 | −0.1290 (2) | 0.3759 (5) | 0.2317 (4) | 0.0179 (9) | |
H3 | −0.1784 | 0.3542 | 0.1764 | 0.021* | |
C4 | −0.1079 (3) | 0.5076 (4) | 0.2611 (4) | 0.0156 (9) | |
H4 | −0.1428 | 0.5771 | 0.2276 | 0.019* | |
C5 | −0.0353 (2) | 0.5373 (4) | 0.3399 (4) | 0.0128 (8) | |
C6 | −0.0046 (2) | 0.6714 (4) | 0.3759 (4) | 0.0141 (8) | |
C7 | −0.0479 (2) | 0.7861 (4) | 0.3361 (4) | 0.0226 (10) | |
H7 | −0.0990 | 0.7784 | 0.2841 | 0.027* | |
C8 | −0.0161 (3) | 0.9104 (5) | 0.3726 (5) | 0.0286 (11) | |
H8 | −0.0453 | 0.9885 | 0.3455 | 0.034* | |
C9 | 0.0584 (2) | 0.9211 (4) | 0.4488 (4) | 0.0216 (9) | |
H9 | 0.0804 | 1.0066 | 0.4732 | 0.026* | |
C10 | 0.1010 (2) | 0.8066 (4) | 0.4897 (4) | 0.0158 (8) | |
H10 | 0.1519 | 0.8155 | 0.5433 | 0.019* | |
C11 | 0.0714 (2) | 0.6793 (4) | 0.4545 (4) | 0.0128 (8) | |
C12 | 0.2791 (2) | 0.4911 (4) | 0.7508 (4) | 0.0183 (9) | |
H12A | 0.3312 | 0.5089 | 0.7948 | 0.027* | |
H12B | 0.2706 | 0.3948 | 0.7389 | 0.027* | |
H12C | 0.2598 | 0.5247 | 0.7938 | 0.027* | |
C13 | 0.2836 (3) | 0.5101 (4) | 0.5582 (4) | 0.0198 (10) | |
H13A | 0.2636 | 0.5486 | 0.4816 | 0.030* | |
H13B | 0.2791 | 0.4127 | 0.5519 | 0.030* | |
H13C | 0.3348 | 0.5346 | 0.6101 | 0.030* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pt1 | 0.01044 (10) | 0.00879 (10) | 0.01265 (11) | 0.00073 (6) | 0.00587 (8) | 0.00039 (5) |
Cl1 | 0.0155 (5) | 0.0109 (4) | 0.0218 (5) | 0.0024 (4) | 0.0076 (4) | 0.0010 (4) |
S1 | 0.0114 (5) | 0.0116 (5) | 0.0152 (5) | 0.0004 (4) | 0.0062 (4) | −0.0005 (4) |
O1 | 0.0144 (15) | 0.0135 (15) | 0.0254 (17) | −0.0006 (12) | 0.0061 (13) | −0.0018 (13) |
N1 | 0.0105 (16) | 0.0156 (17) | 0.0126 (16) | 0.0001 (15) | 0.0064 (14) | 0.0002 (14) |
C1 | 0.019 (2) | 0.013 (2) | 0.020 (2) | 0.0007 (17) | 0.0082 (19) | 0.0022 (17) |
C2 | 0.022 (2) | 0.013 (2) | 0.023 (2) | −0.0050 (18) | 0.012 (2) | −0.0042 (17) |
C3 | 0.014 (2) | 0.021 (2) | 0.019 (2) | −0.0037 (17) | 0.0096 (18) | −0.0006 (17) |
C4 | 0.017 (2) | 0.014 (2) | 0.017 (2) | 0.0010 (16) | 0.0104 (19) | 0.0008 (15) |
C5 | 0.015 (2) | 0.0156 (19) | 0.0109 (19) | 0.0004 (17) | 0.0088 (17) | 0.0003 (16) |
C6 | 0.015 (2) | 0.012 (2) | 0.015 (2) | 0.0003 (16) | 0.0081 (17) | −0.0006 (15) |
C7 | 0.017 (2) | 0.015 (2) | 0.032 (3) | 0.0022 (18) | 0.012 (2) | 0.0014 (19) |
C8 | 0.021 (2) | 0.014 (2) | 0.041 (3) | 0.0067 (18) | 0.012 (2) | 0.003 (2) |
C9 | 0.018 (2) | 0.012 (2) | 0.033 (3) | −0.0042 (18) | 0.013 (2) | −0.0027 (19) |
C10 | 0.0127 (19) | 0.017 (2) | 0.016 (2) | 0.0009 (17) | 0.0064 (17) | 0.0016 (16) |
C11 | 0.014 (2) | 0.0118 (18) | 0.015 (2) | 0.0023 (16) | 0.0100 (17) | 0.0014 (16) |
C12 | 0.013 (2) | 0.021 (2) | 0.017 (2) | 0.0016 (16) | 0.0062 (19) | 0.0009 (16) |
C13 | 0.017 (2) | 0.021 (2) | 0.025 (2) | −0.0001 (17) | 0.014 (2) | −0.0019 (17) |
Pt1—C11 | 2.002 (4) | C3—H3 | 0.9500 |
Pt1—N1 | 2.069 (3) | C4—H4 | 0.9500 |
Pt1—S1 | 2.2181 (11) | C5—C6 | 1.464 (6) |
Pt1—Cl1 | 2.4202 (10) | C6—C7 | 1.400 (6) |
S1—O1 | 1.474 (3) | C6—C11 | 1.413 (6) |
S1—C12 | 1.782 (5) | C7—C8 | 1.382 (6) |
S1—C13 | 1.788 (5) | C7—H7 | 0.9500 |
N1—C5 | 1.355 (6) | C8—C9 | 1.386 (6) |
N1—C1 | 1.359 (6) | C8—H8 | 0.9500 |
C1—C2 | 1.377 (6) | C9—C10 | 1.392 (6) |
C2—C3 | 1.392 (6) | C9—H9 | 0.9500 |
C3—C4 | 1.384 (6) | C10—C11 | 1.393 (6) |
C4—C5 | 1.385 (6) | C10—H10 | 0.9500 |
Pt1—C4i | 3.525 (4) | C12—H12A | 0.9800 |
Pt1—C4ii | 3.523 (4) | C12—H12B | 0.9800 |
Pt1—Pt1i | 5.9946 (8) | C12—H12C | 0.9800 |
Pt1—Pt1ii | 5.4225 (9) | C13—H13A | 0.9800 |
C1—H1 | 0.9500 | C13—H13B | 0.9800 |
C2—H2 | 0.9500 | C13—H13C | 0.9800 |
C11—Pt1—N1 | 80.28 (16) | C7—C6—C11 | 121.5 (4) |
C11—Pt1—S1 | 98.69 (12) | C7—C6—C5 | 122.1 (4) |
N1—Pt1—S1 | 177.97 (10) | C11—C6—C5 | 116.3 (4) |
C11—Pt1—Cl1 | 173.26 (12) | C8—C7—C6 | 119.8 (4) |
N1—Pt1—Cl1 | 92.98 (10) | C8—C7—H7 | 120.1 |
S1—Pt1—Cl1 | 88.05 (4) | C6—C7—H7 | 120.1 |
O1—S1—C12 | 106.22 (19) | C7—C8—C9 | 119.9 (4) |
O1—S1—C13 | 106.0 (2) | C7—C8—H8 | 120.0 |
C12—S1—C13 | 101.9 (2) | C9—C8—H8 | 120.0 |
O1—S1—Pt1 | 122.98 (13) | C8—C9—C10 | 120.0 (4) |
C12—S1—Pt1 | 109.74 (15) | C8—C9—H9 | 120.0 |
C13—S1—Pt1 | 107.97 (16) | C10—C9—H9 | 120.0 |
C5—N1—C1 | 119.6 (4) | C9—C10—C11 | 122.1 (4) |
C5—N1—Pt1 | 116.0 (3) | C9—C10—H10 | 119.0 |
C1—N1—Pt1 | 124.4 (3) | C11—C10—H10 | 119.0 |
N1—C1—C2 | 121.2 (4) | C10—C11—C6 | 116.7 (4) |
N1—C1—H1 | 119.4 | C10—C11—Pt1 | 129.1 (3) |
C2—C1—H1 | 119.4 | C6—C11—Pt1 | 114.2 (3) |
C1—C2—C3 | 119.5 (4) | S1—C12—H12A | 109.5 |
C1—C2—H2 | 120.2 | S1—C12—H12B | 109.5 |
C3—C2—H2 | 120.2 | H12A—C12—H12B | 109.5 |
C4—C3—C2 | 119.1 (4) | S1—C12—H12C | 109.5 |
C4—C3—H3 | 120.5 | H12A—C12—H12C | 109.5 |
C2—C3—H3 | 120.5 | H12B—C12—H12C | 109.5 |
C3—C4—C5 | 119.5 (4) | S1—C13—H13A | 109.5 |
C3—C4—H4 | 120.3 | S1—C13—H13B | 109.5 |
C5—C4—H4 | 120.3 | H13A—C13—H13B | 109.5 |
N1—C5—C4 | 121.2 (4) | S1—C13—H13C | 109.5 |
N1—C5—C6 | 113.2 (4) | H13A—C13—H13C | 109.5 |
C4—C5—C6 | 125.6 (4) | H13B—C13—H13C | 109.5 |
C11—Pt1—S1—O1 | 2.4 (2) | C4—C5—C6—C7 | 2.9 (7) |
Cl1—Pt1—S1—O1 | −177.83 (17) | N1—C5—C6—C11 | 1.3 (5) |
C5—N1—C1—C2 | 0.9 (6) | C4—C5—C6—C11 | −177.9 (4) |
N1—C1—C2—C3 | −0.8 (7) | C11—C6—C7—C8 | 0.9 (7) |
C1—C2—C3—C4 | −0.4 (6) | C5—C6—C7—C8 | −179.9 (4) |
C2—C3—C4—C5 | 1.6 (6) | C6—C7—C8—C9 | −0.3 (8) |
C1—N1—C5—C4 | 0.3 (6) | C7—C8—C9—C10 | −0.9 (7) |
C1—N1—C5—C6 | −178.9 (4) | C8—C9—C10—C11 | 1.4 (7) |
C3—C4—C5—N1 | −1.5 (6) | C9—C10—C11—C6 | −0.8 (6) |
C3—C4—C5—C6 | 177.5 (4) | C7—C6—C11—C10 | −0.4 (6) |
N1—C5—C6—C7 | −178.0 (4) | C5—C6—C11—C10 | −179.6 (4) |
Symmetry codes: (i) −x, y, −z+1/2; (ii) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Pt(C11H8N)Cl(C2H6OS)] |
Mr | 462.85 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 100 |
a, b, c (Å) | 22.414 (3), 10.0205 (16), 14.057 (2) |
β (°) | 124.512 (2) |
V (Å3) | 2601.6 (7) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 11.14 |
Crystal size (mm) | 0.09 × 0.08 × 0.04 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.486, 0.640 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7004, 2850, 2448 |
Rint | 0.018 |
(sin θ/λ)max (Å−1) | 0.641 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.023, 0.064, 1.11 |
No. of reflections | 2850 |
No. of parameters | 165 |
H-atom treatment | H-atom parameters constrained |
w = 1/[σ2(Fo2) + (0.0295P)2 + 15.2156P] where P = (Fo2 + 2Fc2)/3 | |
Δρmax, Δρmin (e Å−3) | 2.05, −1.43 |
Computer programs: APEX2 (Bruker, 2006), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), TEXSAN (Molecular Structure Corporation, 2001), KENX (Sakai, 2004) and ORTEPII (Johnson, 1976).
Acknowledgements
This work was in part supported by a Grant-in-Aid for Scientific Research (A) (No. 17205008), a Grant-in-Aid for Specially Promoted Research (No. 18002016), and a Grant-in-Aid for the Global COE Program (`Science for Future Molecular Systems') from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.
References
Bruker (2004). SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Bruker (2006). APEX2. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Herber, R. H., Croft, M., Coyer, M. J., Bilash, B. & Sahiner, A. (1994). Inorg. Chem. 33, 2422–2426. CrossRef CAS Web of Science Google Scholar
Johnson, C. K. (1976). ORTEPII. Report ORNL-5138. Oak Ridge National Laboratory, Tennessee, USA. Google Scholar
Kobayashi, M., Masaoka, M. & Sakai, K. (2008). Photochem. Photobiol. Sci. Submitted. Google Scholar
Mdleleni, M. M., Bridgewater, J. S., Watts, R. J. & Ford, P. C. (1995). Inorg. Chem. 34, 2334–2342. CrossRef CAS Web of Science Google Scholar
Molecular Structure Corporation (2001). TEXSAN. MSC, The Woodlands, Texas, USA. Google Scholar
Newman, C. P., Casey-Green, K., Clarkson, G. J., Cave, G. W. V., Errington, W. & Rourke, J. P. (2007). Dalton Trans. pp. 3170–3182. Web of Science CSD CrossRef Google Scholar
Ozawa, H., Haga, M. & Sakai, K. (2006). J. Am. Chem. Soc. 128, 4926–4927. Web of Science CrossRef PubMed CAS Google Scholar
Ozawa, H. & Sakai, K. (2007). Chem. Lett. 36, 920–921. Web of Science CrossRef CAS Google Scholar
Ozawa, H., Yokoyama, Y., Haga, M. & Sakai, K. (2007). Dalton Trans. pp. 1197–1206. Web of Science CrossRef Google Scholar
Sakai, K. (2004). KENX. Kyushu University, Japan. Google Scholar
Sakai, K., Kizaki, Y., Tsubomura, T. & Matumoto, K. (1993). J. Mol. Catal. 79, 141–152. CrossRef CAS Google Scholar
Sakai, K. & Ozawa, H. (2007). Coord. Chem. Rev. 251, 2753–2766. Web of Science CrossRef CAS Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Interests over many years have concentrated on the molecular catalysis of PtII complexes in photochemical hydrogen production from water (Sakai et al., 1993; Ozawa et al., 2006; Sakai & Ozawa, 2007; Ozawa, Yokoyama et al., 2007). The results obtained so far suggest that destabilization of the HOMO, which generally corresponds to the filled PtII dz2 orbital, gives rise to the higher H2-evolving activity of the complexes (Sakai & Ozawa, & Sakai, 2007). It has also been ascertained that the mononuclear PtII complexes possessing a cis-PtCl2 unit, such as cis-PtCl2(NH3)2, PtCl2(4,4'-dicarboxy-2,2'-bipyridine), and PtCl2(2,2'-bipyrimidine), exhibit considerably higher H2-evolving activity in comparison with those only having the amine or pyridyl type of neutral ligands, such as [Pt(NH3)4]2+ and [Pt(bpy)2]2+ (Ozawa, Yokoyama et al., 2007). In this context, the 2-phenylpyridinate (ppy) ligand was selected because of the well known strong σ-donating character of the C(ppy) donor, expecting the higher energy level of the HOMO for the PtII(ppy) complexes. As a result, the first water-soluble salt of [Pt(ppy)Cl2]-, that is, [K(18-crown-6)][Pt(ppy)Cl2].0.5H2O (18-crown-6 = 1,4,7,10,13,16-hexaoxacyclooctadecane) [abbreviated as compound (II)], was recently prepared in our group and its catalytic activity in photochemical hydrogen production from water was examined in detail (Kobayashi et al., in submission). The title compound, Pt(ppy)Cl(DMOS-S) (DMSO = dimethyl sulfoxide) [abbreviated as compound (I)], was first prepared from recrystallization of (II) from DMSO, but an improved synthetic route is reported in this work (see Experimental Section). It has been ascertained that the H2-evolving activity of (I) is much lower than that of (II), the reason for which remains ambiguous at the moment.
The donor atoms, except for the sulfur atom S1, comprise a planar geometry and the Pt atom (Pt1) does not deviate from this plane at all. The four-atom r.m.s. deviation, given in the best-plane calculation for the plane defined by atoms N1, C11, Cl1, and Pt1, was negligible (0.0003). Hereafter, this plane is defined as the Pt coordination plane. The sulfur atom (S1) and the oxygen atom (O1) of DMSO are only slightly shifted out of this plane by 0.067 (5) and 0.045 (8) Å, respectively. The torsion angles given by C11—Pt1—S1—O1 = 2.4 (2) and Cl1—Pt1—S1—O1 = -177.83 (17)° also reveal that the oxygen atom of DMSO is not largely shifted out of the coordination plane. Thus, it can be considered that (I) adopts a pseudo mirror symmetry. The benzene ring consisting of atoms C6—C11 is nearly coplanar with the coordination plane, where the dihedral angle between the benzene and the coordination planes is calculated as 0.7 (2)°. The pyridyl plane defined by atoms N1 and C1—C5 is slightly declined with respect to the coordination plane by 2.8 (2)°. The dihedral angle between the two aromatic rings is 2.5 (2)°.
The ppy ligand in compound (I, Fig. 1) does not suffer from any disorder problem. Indeed, there is a clear difference in the bond lengths of Pt—N(ppy) and Pt—C(ppy); Pt1—N1 = 2.069 (3) and Pt1—C11 = 2.002 (4) Å. Because of the strong trans influence originated by the C(ppy) donor, Pt1—Cl1 distance [2.4202 (10) Å] is longer than those reported for PtCl2(2,2'-bipyridine) [2.281 (4) - 2.306 (2) Å; Herber et al., 1994]. Th Pt1—Cl1 distance is comparable to the value reported for Pt(ppy)(Hppy)Cl [2.4145 (23) Å; Mdleleni et al., 1995]. In addition, the Pt1—S1 bond distance [2.2181 (11) Å], in the position trans to the N(ppy) donor, is comparable to those previously reported for Pt(2-(4-fluorophenyl)pyridine)Cl(DMSO) [2.2161 (16) Å; Newman et al., 2007].
On the other hand, compound (I) forms a one-dimensional stack along the c axis based on the π-π stacking interactions between the phenylpyridinatoplatinum(II) units (see Fig. 2). The separation between the two adjacent planes is estimated as 3.44 (9) Å for the stack shown in Fig. 4 and 3.50 (2) Å for that in Fig. 5. In the former (Fig. 4), atoms C1i, C5i, N1i, and Pt1i have an interaction to the phenylpyridinate moiety originally located and therefore shifts of these atoms from the best plane defined by atoms N1 and C1—C11 are used to calculate the separation of the two stacked planes at this geometry. In the latter (Fig. 5), atoms N1ii, C1ii, Cii2, C5ii, C6ii, C10ii, C11ii, and Pt1ii are involved in the π-stacking association and their shifts from the best plane defined by atoms N1 and C1—C11 are similarly used to calculate the separation at this geometry. In these geometries, strong d-π interactions also contribute to the stabilization of stacking associations [Pt1—C4i = 3.525 (4) and Pt1—C4ii = 3.523 (4) Å; symmetry codes: (i) -x, y, 0.5 - z; (ii) -x, 1 - y, 1 - z]. Finally, it must be noted that metal-metal interactions are unimportant in this crystal [Pt1—Pt1i = 5.9946 (8) and Pt1—Pt1ii = 5.4225 (9) Å], where the symmetry operations are same to those given in Fig. 4 and Fig. 5.