cis-Dimethyl­bis(triphenyl­arsine)platinum(II)

Abo-Amer, A.

doi:10.1107/S1600536809055470

metal-organic compounds

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ISSN: 2056-9890

Volume 66| Part 2| February 2010| Page m172

https://doi.org/10.1107/S1600536809055470

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cis-Dimethylbis(triphenylarsine)platinum(II)

Anwar Abo-Amer ^a ^*

^aChemistry Department, Al al-Bayt University, Al-Mafraq, Jordan
^*Correspondence e-mail: anwar.aboamer@aabu.edu.jo

(Received 24 December 2009; accepted 26 December 2009; online 16 January 2010)

In the title compound, [Pt(CH₃)₂(C₁₈H₁₅As)₂], the Pt^II atom adopts a distorted cis-PtAs₂C₂ square-planar coordination geometry. In the crystal, molecules interact via aromatic π–π stacking interactions [centroid–centroid separation = 3.6741 (18) Å].

Related literature

For the structures of related complexes, see: Anderson et al. (1982 ); Al-Fawaz et al. (2004 ); Fun et al. (2006 ). For further synthetic details, see: Puddephatt et al. (1998 ).

Experimental

Crystal data

[Pt(CH₃)₂(C₁₈H₁₅As)₂]
M_r = 837.60
Triclinic, $[P \overline 1]$
a = 10.1033 (9) Å
b = 10.3937 (8) Å
c = 17.2452 (13) Å
α = 91.106 (2)°
β = 99.588 (2)°
γ = 115.227 (2)°
V = 1607.0 (2) Å³
Z = 2
Mo Kα radiation
μ = 6.43 mm⁻¹
T = 150 K
0.22 × 0.20 × 0.19 mm

Data collection

Bruker APEXII CCD diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2001 ) T_min = 0.332, T_max = 0.374
19166 measured reflections
9358 independent reflections
8543 reflections with I > 2σ(I)
R_int = 0.019

Refinement

R[F² > 2σ(F²)] = 0.020
wR(F²) = 0.077
S = 0.64
9358 reflections
372 parameters
H-atom parameters constrained
Δρ_max = 0.56 e Å⁻³
Δρ_min = −1.07 e Å⁻³

Table 1
Selected bond lengths (Å)

Pt1—C20	2.060 (3)
Pt1—C19	2.083 (3)
Pt1—As1	2.3960 (3)
Pt1—As2	2.4086 (3)

Data collection: APEX2 (Bruker, 2001); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.

Supporting information

Crystal structure: contains datablocks I, global. DOI: https://doi.org/10.1107/S1600536809055470/hb5294sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809055470/hb5294Isup2.hkl

checkCIF report

Comment top

cis- and trans-Dimethylebis(triphenylarsine)platinum(II) are useful to prepare other platinum complexes. The structures of the cis-isomer have been not reported. During the course of our studies on platinium sulfide compounds cis-[Pt₂Me₄(µ-SMe₂)₂] with Lewis bases, a colorless crystals of the title compound, (I), was obtained. As shown in Fig.1, the platinum centre is four-coordinated and adopts a nearly square planar geometry. The Pt—As bond lengths (2.3960 (2) and 2.4086 (2) Å) and Pt—C bond lengths (2.060 (3) and 2.083 (3) Å), as well as the bond angles around the Pt atom are similar to those in the above-mentioned structures.

Related literature top

For the structures of related complexes, see: Anderson et al. (1982); Al-Fawaz et al. (2004); Fun et al. (2006). For further synthetic details, see: Puddephatt et al. (1998).

Experimental top

The title complex was prepared by the addition of an excess of AsPh₃(0.2133 mmol) to an anhydrous diethyl ether solution (20 ml) of cis-[PtMe₂(SMe₂)₂]₂ (0.17413 mmol) (Puddephatt et al. 1998) at 298 K. The desired product precipitates spontaneously in near quantitative yield (78.9% yield) and was recrystallized from dichloromethane at 298 K to yield colourless prisms of (I).

Structure description top

For the structures of related complexes, see: Anderson et al. (1982); Al-Fawaz et al. (2004); Fun et al. (2006). For further synthetic details, see: Puddephatt et al. (1998).

Computing details top

Data collection: APEX2 (Bruker, 2001); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top

Fig. 1. The molecular structure of (I) showing 50% displacement ellipsoids (H atoms omitted for clarity).

cis-Dimethylbis(triphenylarsine)platinum(II) top

Crystal data top

[Pt(CH₃)₂(C₁₈H₁₅As)₂]	Z = 2
M_r = 837.60	F(000) = 816
Triclinic, P1	D_x = 1.731 Mg m⁻³
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 10.1033 (9) Å	Cell parameters from 9885 reflections
b = 10.3937 (8) Å	θ = 2.3–30.2°
c = 17.2452 (13) Å	µ = 6.43 mm⁻¹
α = 91.106 (2)°	T = 150 K
β = 99.588 (2)°	Prism, colourless
γ = 115.227 (2)°	0.22 × 0.20 × 0.19 mm
V = 1607.0 (2) Å³

Data collection top

Bruker APEXII CCD diffractometer	9358 independent reflections
Radiation source: fine-focus sealed tube	8543 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.019
φ and ω scans	θ_max = 30.2°, θ_min = 1.2°
Absorption correction: multi-scan (SADABS; Bruker, 2001)	h = −14→13
T_min = 0.332, T_max = 0.374	k = −14→14
19166 measured reflections	l = −24→24

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)] = 0.020	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.077	H-atom parameters constrained
S = 0.64	w = 1/[σ²(F_o²) + (0.1P)²] where P = (F_o² + 2F_c²)/3
9358 reflections	(Δ/σ)_max = 0.066
372 parameters	Δρ_max = 0.56 e Å⁻³
0 restraints	Δρ_min = −1.07 e Å⁻³

Crystal data top

[Pt(CH₃)₂(C₁₈H₁₅As)₂]	γ = 115.227 (2)°
M_r = 837.60	V = 1607.0 (2) Å³
Triclinic, P1	Z = 2
a = 10.1033 (9) Å	Mo Kα radiation
b = 10.3937 (8) Å	µ = 6.43 mm⁻¹
c = 17.2452 (13) Å	T = 150 K
α = 91.106 (2)°	0.22 × 0.20 × 0.19 mm
β = 99.588 (2)°

Data collection top

Bruker APEXII CCD diffractometer	9358 independent reflections
Absorption correction: multi-scan (SADABS; Bruker, 2001)	8543 reflections with I > 2σ(I)
T_min = 0.332, T_max = 0.374	R_int = 0.019
19166 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.020	0 restraints
wR(F²) = 0.077	H-atom parameters constrained
S = 0.64	Δρ_max = 0.56 e Å⁻³
9358 reflections	Δρ_min = −1.07 e Å⁻³
372 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	U_iso*/U_eq
Pt1	1.029195 (9)	0.072490 (9)	0.271372 (5)	0.01642 (4)
As1	1.04466 (3)	0.25078 (3)	0.367248 (15)	0.01542 (6)
As2	0.85760 (3)	0.10672 (3)	0.168572 (15)	0.01719 (6)
C1	0.8543 (3)	0.2235 (3)	0.39079 (15)	0.0188 (4)
C2	0.8076 (3)	0.3307 (3)	0.39670 (16)	0.0236 (5)
H2	0.8707	0.4259	0.3885	0.028*
C3	0.6679 (3)	0.2982 (4)	0.41463 (17)	0.0311 (6)
H3	0.6352	0.3710	0.4180	0.037*
C4	0.5768 (3)	0.1597 (4)	0.42758 (19)	0.0357 (7)
H4	0.4829	0.1382	0.4412	0.043*
C5	0.6223 (3)	0.0536 (4)	0.42067 (19)	0.0336 (7)
H5	0.5586	−0.0414	0.4288	0.040*
C6	0.7605 (3)	0.0839 (3)	0.40192 (17)	0.0248 (5)
H6	0.7908	0.0098	0.3967	0.030*
C7	1.1385 (2)	0.4450 (3)	0.33885 (15)	0.0176 (4)
C8	1.1859 (3)	0.4651 (3)	0.26647 (16)	0.0241 (5)
H8	1.1696	0.3849	0.2322	0.029*
C9	1.2570 (3)	0.6023 (3)	0.2447 (2)	0.0322 (6)
H9	1.2887	0.6161	0.1954	0.039*
C10	1.2818 (3)	0.7199 (3)	0.2954 (2)	0.0330 (7)
H10	1.3291	0.8139	0.2803	0.040*
C11	1.2374 (3)	0.6997 (3)	0.3677 (2)	0.0295 (6)
H11	1.2559	0.7800	0.4026	0.035*
C12	1.1659 (3)	0.5623 (3)	0.38953 (16)	0.0227 (5)
H12	1.1358	0.5489	0.4393	0.027*
C13	1.1613 (3)	0.2778 (3)	0.47356 (15)	0.0180 (4)
C14	1.3155 (3)	0.3227 (3)	0.48190 (17)	0.0246 (5)
H14	1.3604	0.3403	0.4366	0.029*
C15	1.4027 (3)	0.3414 (3)	0.55628 (19)	0.0299 (6)
H15	1.5072	0.3723	0.5617	0.036*
C16	1.3385 (3)	0.3152 (3)	0.62213 (18)	0.0303 (6)
H16	1.3988	0.3279	0.6728	0.036*
C17	1.1872 (4)	0.2707 (4)	0.61499 (18)	0.0340 (7)
H17	1.1434	0.2533	0.6607	0.041*
C18	1.0979 (3)	0.2513 (3)	0.54014 (17)	0.0264 (5)
H18	0.9934	0.2198	0.5352	0.032*
C19	1.0329 (3)	−0.0808 (3)	0.19328 (19)	0.0294 (6)
H19A	1.1365	−0.0600	0.1916	0.044*
H19B	0.9808	−0.0790	0.1403	0.044*
H19C	0.9833	−0.1757	0.2112	0.044*
C20	1.1755 (3)	0.0233 (3)	0.34881 (18)	0.0297 (6)
H20A	1.1554	−0.0765	0.3362	0.045*
H20B	1.1627	0.0367	0.4030	0.045*
H20C	1.2780	0.0862	0.3440	0.045*
C21	0.7011 (3)	−0.0729 (3)	0.11442 (15)	0.0190 (4)
C22	0.6602 (3)	−0.1928 (3)	0.15666 (18)	0.0266 (5)
H22	0.7092	−0.1856	0.2097	0.032*
C23	0.5468 (3)	−0.3232 (3)	0.1202 (2)	0.0320 (6)
H23	0.5195	−0.4051	0.1486	0.038*
C24	0.4745 (3)	−0.3344 (3)	0.0442 (2)	0.0314 (6)
H24	0.3960	−0.4234	0.0206	0.038*
C25	0.5153 (3)	−0.2165 (3)	0.00144 (18)	0.0286 (6)
H25	0.4660	−0.2248	−0.0517	0.034*
C26	0.6292 (3)	−0.0855 (3)	0.03672 (16)	0.0231 (5)
H26	0.6577	−0.0046	0.0075	0.028*
C27	0.9495 (3)	0.2048 (3)	0.08340 (16)	0.0208 (5)
C28	1.0904 (3)	0.2177 (3)	0.07933 (18)	0.0256 (5)
H28	1.1393	0.1803	0.1179	0.031*
C29	1.1602 (3)	0.2855 (3)	0.0186 (2)	0.0338 (7)
H29	1.2560	0.2925	0.0155	0.041*
C30	1.0929 (4)	0.3417 (3)	−0.03621 (19)	0.0326 (7)
H30	1.1421	0.3888	−0.0770	0.039*
C31	0.9532 (4)	0.3303 (3)	−0.03262 (18)	0.0317 (6)
H31	0.9059	0.3689	−0.0713	0.038*
C32	0.8815 (3)	0.2632 (3)	0.02676 (17)	0.0260 (5)
H32	0.7856	0.2566	0.0291	0.031*
C33	0.7360 (3)	0.2037 (3)	0.18684 (15)	0.0196 (5)
C34	0.7918 (3)	0.3515 (3)	0.18978 (17)	0.0236 (5)
H34	0.8900	0.4068	0.1812	0.028*
C35	0.7047 (3)	0.4193 (3)	0.20524 (18)	0.0297 (6)
H35	0.7431	0.5203	0.2063	0.036*
C36	0.5628 (4)	0.3401 (4)	0.2190 (2)	0.0328 (6)
H36	0.5037	0.3866	0.2297	0.039*
C37	0.5064 (3)	0.1928 (4)	0.21732 (19)	0.0322 (6)
H37	0.4089	0.1383	0.2270	0.039*
C38	0.5923 (3)	0.1251 (3)	0.20146 (17)	0.0261 (5)
H38	0.5532	0.0241	0.2005	0.031*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Pt1	0.01636 (6)	0.01714 (6)	0.01599 (6)	0.00868 (4)	0.00017 (4)	−0.00089 (4)
As1	0.01461 (10)	0.01646 (11)	0.01471 (12)	0.00679 (9)	0.00170 (9)	0.00018 (9)
As2	0.01673 (11)	0.01870 (12)	0.01557 (12)	0.00809 (9)	0.00068 (9)	0.00099 (9)
C1	0.0151 (9)	0.0246 (12)	0.0153 (11)	0.0081 (9)	0.0010 (8)	0.0000 (9)
C2	0.0226 (11)	0.0284 (13)	0.0212 (12)	0.0137 (10)	0.0009 (10)	−0.0017 (10)
C3	0.0269 (12)	0.0515 (18)	0.0212 (13)	0.0245 (13)	0.0012 (11)	−0.0013 (12)
C4	0.0186 (11)	0.064 (2)	0.0231 (14)	0.0167 (13)	0.0042 (10)	0.0064 (14)
C5	0.0202 (12)	0.0395 (17)	0.0292 (15)	0.0011 (11)	0.0062 (11)	0.0046 (13)
C6	0.0183 (10)	0.0248 (12)	0.0272 (14)	0.0060 (9)	0.0027 (10)	0.0022 (10)
C7	0.0157 (9)	0.0182 (11)	0.0183 (11)	0.0072 (8)	0.0023 (8)	0.0003 (9)
C8	0.0226 (11)	0.0270 (13)	0.0199 (12)	0.0084 (10)	0.0034 (10)	0.0001 (10)
C9	0.0307 (13)	0.0323 (15)	0.0314 (16)	0.0094 (12)	0.0110 (12)	0.0135 (12)
C10	0.0308 (14)	0.0239 (13)	0.0427 (18)	0.0112 (11)	0.0039 (13)	0.0125 (13)
C11	0.0284 (13)	0.0202 (12)	0.0389 (17)	0.0109 (10)	0.0031 (12)	0.0046 (11)
C12	0.0254 (11)	0.0216 (12)	0.0206 (12)	0.0104 (10)	0.0028 (10)	0.0006 (9)
C13	0.0173 (9)	0.0179 (10)	0.0159 (11)	0.0061 (8)	0.0007 (8)	0.0004 (8)
C14	0.0215 (11)	0.0284 (13)	0.0225 (13)	0.0103 (10)	0.0025 (10)	0.0026 (10)
C15	0.0206 (11)	0.0296 (14)	0.0328 (16)	0.0082 (10)	−0.0044 (11)	0.0038 (12)
C16	0.0316 (13)	0.0293 (14)	0.0228 (13)	0.0116 (11)	−0.0088 (11)	0.0032 (11)
C17	0.0377 (15)	0.0427 (17)	0.0181 (13)	0.0153 (14)	0.0019 (12)	0.0054 (12)
C18	0.0244 (12)	0.0352 (15)	0.0203 (13)	0.0127 (11)	0.0062 (10)	0.0057 (11)
C19	0.0348 (14)	0.0320 (15)	0.0272 (14)	0.0222 (12)	0.0009 (12)	−0.0050 (11)
C20	0.0353 (14)	0.0370 (15)	0.0254 (14)	0.0275 (13)	−0.0040 (11)	−0.0033 (12)
C21	0.0182 (10)	0.0194 (11)	0.0177 (11)	0.0074 (9)	0.0014 (9)	0.0016 (9)
C22	0.0256 (12)	0.0269 (13)	0.0258 (14)	0.0106 (10)	0.0024 (10)	0.0090 (11)
C23	0.0261 (12)	0.0236 (13)	0.0437 (18)	0.0082 (11)	0.0065 (12)	0.0107 (12)
C24	0.0195 (11)	0.0241 (13)	0.0434 (18)	0.0052 (10)	0.0000 (11)	−0.0032 (12)
C25	0.0224 (11)	0.0319 (14)	0.0252 (14)	0.0089 (11)	−0.0030 (10)	−0.0044 (11)
C26	0.0219 (11)	0.0240 (12)	0.0201 (12)	0.0083 (10)	−0.0001 (9)	0.0029 (10)
C27	0.0201 (10)	0.0197 (11)	0.0203 (12)	0.0065 (9)	0.0040 (9)	−0.0006 (9)
C28	0.0230 (11)	0.0260 (13)	0.0301 (14)	0.0115 (10)	0.0089 (10)	0.0005 (11)
C29	0.0327 (14)	0.0280 (14)	0.0405 (18)	0.0088 (12)	0.0192 (13)	0.0018 (12)
C30	0.0421 (16)	0.0236 (13)	0.0274 (15)	0.0064 (12)	0.0172 (13)	−0.0010 (11)
C31	0.0423 (16)	0.0275 (14)	0.0215 (14)	0.0108 (12)	0.0079 (12)	0.0051 (11)
C32	0.0277 (12)	0.0251 (13)	0.0225 (13)	0.0091 (10)	0.0042 (10)	0.0045 (10)
C33	0.0195 (10)	0.0270 (12)	0.0151 (11)	0.0131 (9)	0.0022 (9)	0.0039 (9)
C34	0.0265 (12)	0.0242 (12)	0.0227 (13)	0.0143 (10)	0.0024 (10)	0.0024 (10)
C35	0.0374 (15)	0.0319 (14)	0.0274 (14)	0.0220 (13)	0.0065 (12)	0.0031 (11)
C36	0.0394 (15)	0.0419 (17)	0.0301 (15)	0.0282 (14)	0.0104 (13)	0.0077 (13)
C37	0.0306 (13)	0.0448 (18)	0.0283 (15)	0.0203 (13)	0.0129 (12)	0.0112 (13)
C38	0.0261 (12)	0.0304 (14)	0.0247 (13)	0.0137 (11)	0.0079 (10)	0.0074 (11)

Geometric parameters (Å, º) top

Pt1—C20	2.060 (3)	C17—H17	0.9500
Pt1—C19	2.083 (3)	C18—H18	0.9500
Pt1—As1	2.3960 (3)	C19—H19A	0.9800
Pt1—As2	2.4086 (3)	C19—H19B	0.9800
As1—C1	1.935 (2)	C19—H19C	0.9800
As1—C7	1.943 (2)	C20—H20A	0.9800
As1—C13	1.951 (2)	C20—H20B	0.9800
As2—C27	1.940 (3)	C20—H20C	0.9800
As2—C21	1.945 (2)	C21—C26	1.388 (4)
As2—C33	1.949 (2)	C21—C22	1.397 (4)
C1—C2	1.391 (4)	C22—C23	1.396 (4)
C1—C6	1.393 (4)	C22—H22	0.9500
C2—C3	1.395 (4)	C23—C24	1.366 (5)
C2—H2	0.9500	C23—H23	0.9500
C3—C4	1.386 (5)	C24—C25	1.387 (4)
C3—H3	0.9500	C24—H24	0.9500
C4—C5	1.374 (5)	C25—C26	1.396 (4)
C4—H4	0.9500	C25—H25	0.9500
C5—C6	1.391 (4)	C26—H26	0.9500
C5—H5	0.9500	C27—C28	1.385 (3)
C6—H6	0.9500	C27—C32	1.396 (4)
C7—C12	1.384 (3)	C28—C29	1.395 (4)
C7—C8	1.398 (4)	C28—H28	0.9500
C8—C9	1.388 (4)	C29—C30	1.356 (5)
C8—H8	0.9500	C29—H29	0.9500
C9—C10	1.395 (5)	C30—C31	1.377 (5)
C9—H9	0.9500	C30—H30	0.9500
C10—C11	1.384 (5)	C31—C32	1.380 (4)
C10—H10	0.9500	C31—H31	0.9500
C11—C12	1.391 (4)	C32—H32	0.9500
C11—H11	0.9500	C33—C34	1.389 (4)
C12—H12	0.9500	C33—C38	1.399 (3)
C13—C18	1.383 (4)	C34—C35	1.393 (4)
C13—C14	1.403 (3)	C34—H34	0.9500
C14—C15	1.388 (4)	C35—C36	1.380 (4)
C14—H14	0.9500	C35—H35	0.9500
C15—C16	1.375 (4)	C36—C37	1.385 (5)
C15—H15	0.9500	C36—H36	0.9500
C16—C17	1.378 (4)	C37—C38	1.383 (4)
C16—H16	0.9500	C37—H37	0.9500
C17—C18	1.403 (4)	C38—H38	0.9500

C20—Pt1—C19	84.17 (12)	C13—C18—C17	120.2 (3)
C20—Pt1—As1	91.34 (8)	C13—C18—H18	119.9
C19—Pt1—As1	175.17 (8)	C17—C18—H18	119.9
C20—Pt1—As2	172.47 (8)	Pt1—C19—H19A	109.5
C19—Pt1—As2	88.30 (9)	Pt1—C19—H19B	109.5
As1—Pt1—As2	96.184 (10)	H19A—C19—H19B	109.5
C1—As1—C7	106.44 (10)	Pt1—C19—H19C	109.5
C1—As1—C13	100.90 (10)	H19A—C19—H19C	109.5
C7—As1—C13	99.16 (10)	H19B—C19—H19C	109.5
C1—As1—Pt1	114.16 (8)	Pt1—C20—H20A	109.5
C7—As1—Pt1	114.10 (7)	Pt1—C20—H20B	109.5
C13—As1—Pt1	120.02 (7)	H20A—C20—H20B	109.5
C27—As2—C21	103.04 (11)	Pt1—C20—H20C	109.5
C27—As2—C33	101.73 (11)	H20A—C20—H20C	109.5
C21—As2—C33	99.24 (11)	H20B—C20—H20C	109.5
C27—As2—Pt1	113.51 (8)	C26—C21—C22	119.6 (2)
C21—As2—Pt1	112.60 (8)	C26—C21—As2	122.77 (19)
C33—As2—Pt1	123.96 (7)	C22—C21—As2	117.67 (19)
C2—C1—C6	119.8 (2)	C23—C22—C21	119.4 (3)
C2—C1—As1	125.07 (19)	C23—C22—H22	120.3
C6—C1—As1	115.17 (19)	C21—C22—H22	120.3
C1—C2—C3	119.9 (3)	C24—C23—C22	120.8 (3)
C1—C2—H2	120.1	C24—C23—H23	119.6
C3—C2—H2	120.1	C22—C23—H23	119.6
C4—C3—C2	120.0 (3)	C23—C24—C25	120.2 (3)
C4—C3—H3	120.0	C23—C24—H24	119.9
C2—C3—H3	120.0	C25—C24—H24	119.9
C5—C4—C3	120.1 (3)	C24—C25—C26	119.7 (3)
C5—C4—H4	120.0	C24—C25—H25	120.1
C3—C4—H4	120.0	C26—C25—H25	120.1
C4—C5—C6	120.6 (3)	C21—C26—C25	120.3 (3)
C4—C5—H5	119.7	C21—C26—H26	119.9
C6—C5—H5	119.7	C25—C26—H26	119.9
C5—C6—C1	119.6 (3)	C28—C27—C32	118.8 (3)
C5—C6—H6	120.2	C28—C27—As2	117.8 (2)
C1—C6—H6	120.2	C32—C27—As2	123.44 (19)
C12—C7—C8	119.8 (2)	C27—C28—C29	119.9 (3)
C12—C7—As1	122.02 (19)	C27—C28—H28	120.0
C8—C7—As1	118.05 (19)	C29—C28—H28	120.0
C9—C8—C7	120.0 (3)	C30—C29—C28	120.8 (3)
C9—C8—H8	120.0	C30—C29—H29	119.6
C7—C8—H8	120.0	C28—C29—H29	119.6
C8—C9—C10	119.8 (3)	C29—C30—C31	119.9 (3)
C8—C9—H9	120.1	C29—C30—H30	120.1
C10—C9—H9	120.1	C31—C30—H30	120.1
C11—C10—C9	120.0 (3)	C30—C31—C32	120.5 (3)
C11—C10—H10	120.0	C30—C31—H31	119.8
C9—C10—H10	120.0	C32—C31—H31	119.8
C10—C11—C12	120.2 (3)	C31—C32—C27	120.2 (3)
C10—C11—H11	119.9	C31—C32—H32	119.9
C12—C11—H11	119.9	C27—C32—H32	119.9
C7—C12—C11	120.1 (3)	C34—C33—C38	118.6 (2)
C7—C12—H12	120.0	C34—C33—As2	121.24 (19)
C11—C12—H12	120.0	C38—C33—As2	120.0 (2)
C18—C13—C14	119.1 (2)	C33—C34—C35	120.4 (3)
C18—C13—As1	122.79 (19)	C33—C34—H34	119.8
C14—C13—As1	118.08 (19)	C35—C34—H34	119.8
C15—C14—C13	120.1 (3)	C36—C35—C34	120.2 (3)
C15—C14—H14	119.9	C36—C35—H35	119.9
C13—C14—H14	119.9	C34—C35—H35	119.9
C16—C15—C14	120.3 (3)	C35—C36—C37	120.0 (3)
C16—C15—H15	119.9	C35—C36—H36	120.0
C14—C15—H15	119.9	C37—C36—H36	120.0
C15—C16—C17	120.4 (3)	C38—C37—C36	119.9 (3)
C15—C16—H16	119.8	C38—C37—H37	120.0
C17—C16—H16	119.8	C36—C37—H37	120.0
C16—C17—C18	119.9 (3)	C37—C38—C33	120.8 (3)
C16—C17—H17	120.1	C37—C38—H38	119.6
C18—C17—H17	120.1	C33—C38—H38	119.6

Experimental details

Crystal data
Chemical formula	[Pt(CH₃)₂(C₁₈H₁₅As)₂]
M_r	837.60
Crystal system, space group	Triclinic, P1
Temperature (K)	150
a, b, c (Å)	10.1033 (9), 10.3937 (8), 17.2452 (13)
α, β, γ (°)	91.106 (2), 99.588 (2), 115.227 (2)
V (Å³)	1607.0 (2)
Z	2
Radiation type	Mo Kα
µ (mm⁻¹)	6.43
Crystal size (mm)	0.22 × 0.20 × 0.19

Data collection
Diffractometer	Bruker APEXII CCD
Absorption correction	Multi-scan (SADABS; Bruker, 2001)
T_min, T_max	0.332, 0.374
No. of measured, independent and observed [I > 2σ(I)] reflections	19166, 9358, 8543
R_int	0.019
(sin θ/λ)_max (Å⁻¹)	0.707

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.020, 0.077, 0.64
No. of reflections	9358
No. of parameters	372
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.56, −1.07

Computer programs: APEX2 (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Selected bond lengths (Å) top

Pt1—C20	2.060 (3)	Pt1—As1	2.3960 (3)
Pt1—C19	2.083 (3)	Pt1—As2	2.4086 (3)

Acknowledgements

I would like to thank Prof. Puddephatt (University of Western Ontario) for financial support and the data collection.

References

Al-Fawaz, A., Aldridge, S., Coombs, D. L., Dickinson, A. A., Willock, D. J., Ooi, L., Light, M. E., Coles, S. J. & Hursthouse, M. B. (2004). Dalton Trans. pp. 4030–4037. Web of Science CSD CrossRef PubMed Google Scholar
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