Di-μ-chlorido-bis[chlorido(η²-ethene)platinum(II)]

Zeise's dimer, [Pt₂Cl₄(C₂H₄)₂)], consists of two independent dimeric mol­ecules in the unit cell, one of which is crystallographically centrosymmetric. All Pt atoms are essentially square planar with bridging and trans terminal chloride groups. The eth­ene groups are orthogonal to the mol­ecular square plane. In the non-centrosymmetric mol­ecule, the two square planes subtend an angle of 160.10 (13)° at the bridging Cl atoms. The crystal structure exhibits layers of molecules running approximately parallel to the (001) face, with a layer of the centrosymmetric dimer stacked directly between two layers of the non-centro­symmetric mol­ecules [Pt...Pt = 4.053 (1) and 4.090 (1) Å]. Within this stack, the eth­ene groups of the central mol­ecule are located betwen two terminal chloride groups of the adjacent mol­ecules. Adjacent three-layer sandwiches are staggered from each other so that stacking occurs for only one square plane, disrupting any further inter­action by one Pt atom but allowing a weaker Pt...Pt inter­action [4.249 (1) Å]. The non-centrosymmetric mol­ecule layer exhibits a weak hydrogen bond between a terminal chloride and an ethene H atom of an adjacent mol­ecule.

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean [sigma](C-C) = 0.030 Å
• R factor = 0.054
• wR factor = 0.140
• Data-to-parameter ratio = 25.6

checkCIF/PLATON results

No syntax errors found



Alert level B
PLAT342_ALERT_3_B Low Bond Precision on C-C Bonds (x 1000) Ang ...         30

Alert level C
PLAT062_ALERT_4_C Rescale T(min) & T(max) by .....................       0.06
PLAT241_ALERT_2_C Check High      Ueq as Compared to Neighbors for        C11
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for        Pt1
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for        Pt2
PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor ....       2.26
PLAT366_ALERT_2_C Short? C(sp?)-C(sp?) Bond  C21    -   C22    ...       1.38 Ang.
PLAT366_ALERT_2_C Short? C(sp?)-C(sp?) Bond  C31    -   C32    ...       1.39 Ang.
PLAT764_ALERT_4_C Overcomplete CIF Bond List Detected (Rep/Expd) .       1.33 Ratio

Alert level G
ABSTM02_ALERT_3_G  When printed, the submitted absorption T values will be
            replaced by the scaled T values. Since the ratio of scaled T's
            is identical to the ratio of reported T values, the scaling
            does not imply a change to the absorption corrections used in
            the study.
            Ratio of Tmax expected/reported      0.061
            Tmax scaled      0.058 Tmin scaled      0.009
PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature        293 K
PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature .        293 K

   0 ALERT level A = In general: serious problem
   1 ALERT level B = Potentially serious problem
   8 ALERT level C = Check and explain
   3 ALERT level G = General alerts; check

   2 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   6 ALERT type 2 Indicator that the structure model may be wrong or deficient
   2 ALERT type 3 Indicator that the structure quality may be low
   2 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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S1. Comment

Bis(µ₂-chloro)dichlorobis(η²-ethene)diplatinum(II) (Zeize's dimer) consists of two independent dimeric molecules in the unit cell, one of which is crystallographically centrosymmetric (Fig. 1). All platinum atoms are essentially square planar with bridging and terminal chloride groups. The ethylene groups are trans to each other across the dimeric unit in both molecules and are essentially orthogonal to the square plane geometry of their coordinated platinum atom. The non-centrosymmetric molecule exhibits a small hinge angle of 160.10 (13)° at the bridging chlorides. The overall geometry and molecular dimensions are comparable to related palladium and platinum structures, (Jain & Jain, 2005; Otto et al., 2003) including the palladium analogue (Dempsey & Baenziger, 1955). Amongst these, however, only bis(µ₂-chloro)dichlorobis(η²-1,3-di-tert-butyl-2,2-dimethyl-1,3-diaza-2-sila-4- cyclopentene)dipalladium(II) is not rigorously planar (hinge angle = 150.9°) (Zettlitzer et al., 1986).

The title compound exhibits a layered structure running approximately parallel to the (0 0 1) face with a layer of the centrosymmetric dimer directly stacked between two layers of the non-centrosymmetric molecules (Pt(1)···Pt(2) 4.053 (1) Å and Pt(1')···Pt(3) 4.090 (1) Å). Within this stack, the ethylene groups of the central molecule are located between two terminal chloride groups of the adjacent molecules (τ ~90° (Aullón & Alvarez, 1997)). Adjacent three layer sandwiches are staggered from each other so that stacking occurs for only one square plane, disrupting any further interaction by Pt(2), but allowing a weaker Pt(3)···Pt(3) interaction (4.249 (1) Å). The direct Pt···Pt interaction thus extends for only five layers (Fig. 2). The Pt···Pt distances are comparable to those in K₂[PtCl₄] in which the electronic effects of any interaction are classified as minimal (Aullón & Alvarez, 1997). By contrast, in the palladium analogue, the molecules stack directly above each other, but with a 90° twist between adjacent Pd₂(µ₂-Cl)₂ units leading to parallel Pd···Cl···Pd chains (3.76 Å) (Dempsey & Baenziger, 1955).

Within the presented structure, the non-centrosymmetric molecule layer exhibits a weak hydrogen bond between one terminal chloride and an ethylene hydrogen on an adjacent molecule (Fig. 2).

Related literature

Zeize's salt, K[PtCl₃(η²-C₂H₄)].H₂O, and Zeize's dimer, Pt₂(µ-Cl)₂Cl₂(η²-C₂H₄)₂, are pivotal in our understanding of the interaction between organic molecules and transition metals (Zeize, 1831; Anderson, 1934). For historical background, see: Hunt (1984). However, it was not until 1975, after many difficulties, that the crystal structure of Zeize's salt was finally succesfully solved (Love et al., 1975). The structure of the historically significant Zeize's dimer has never been determined crystallographically, although analogues have been reported (Dempsey & Baenziger, 1955; Jain & Jain, 2005; Otto et al., 2003). For related literature, see: Aullón & Alvarez (1997); Boag & Ravetz (1995); Zettlitzer et al. (1986). [Please note that the Related literature section must contain all those references, and only those references, that are cited in the Supplementary material. It cannot be used to cite references that are not cited elsewhere in the CIF. Thus, the first four will be removed unless you wish to provide a revised Comment or other section which cites them, and the last three have been added.]

S2. Experimental

The title compound was prepared by literature methods and subsequently isolated from dichloromethane/hexane as as a few small irregular red crystals following crystallization of the residue of its reaction mixture with SbPh₃ in refluxing tetrachloroethane (Boag & Ravetz, 1995).

S3. Refinement

The hydrogen atoms were placed in calculated positions and allowed to ride on their respective atoms, with C—H = 0.97 Å and U_iso(H) = 1.2 U_eq(C).

Computing details

Data collection: P3 Diffractometer Control Program (Siemens, 1990); cell refinement: XSCANS (Siemens, 1996); data reduction: XSCANS (Siemens, 1996); program(s) used to solve structure: SHELXTL-Plus (Sheldrick, 1995); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL-Plus (Sheldrick, 1995); software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).

Figures

	Fig. 1. The two independent molecules of the title compound, showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 50% probability level.
	Fig. 2. Packing diagram of the title compound showing stacking between molecules and hydrogen bonding. For the sake of clarity, only the H atoms involved in hydrogen bonding have been included. Atoms marked with an a, b, c, d, e and f are at the symmetry positions (1 - x, -y, -z), (-x, 1 - y, 1 - z), (1 + x, 1 + y, 1 + z), (x, y - 1, z), (-x, 1 - y, 1 - z) and (x - 1, 1 + y, 1 + z) respectively.

Di-µ-chlorido-bid[chlorido(η²-ethene)platinum(II)]

Crystal data

[Pt2Cl4(C2H4)2]	Z = 3
Mr = 588.06	F(000) = 768
Triclinic, P1	Dx = 3.845 Mg m^−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 6.6413 (8) Å	Cell parameters from 49 reflections
b = 10.1222 (13) Å	θ = 7.3–15.3°
c = 12.2397 (15) Å	µ = 28.49 mm^−1
α = 87.23 (1)°	T = 293 K
β = 75.462 (9)°	Irregular block, red
γ = 73.142 (10)°	0.20 × 0.10 × 0.10 mm
V = 761.97 (16) Å^3

Data collection

Nicolet R3m/V diffractometer	2740 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	Rint = 0.039
Graphite monochromator	θmax = 27.6°, θmin = 2.1°
intensity fitting of θ/2θ scans	h = 0→8
Absorption correction: ψ scan (XPREP; Siemens, 1995)	k = −12→13
Tmin = 0.150, Tmax = 0.954	l = −15→15
3804 measured reflections	3 standard reflections every 100 reflections
3502 independent reflections	intensity decay: none

Refinement

Refinement on F^2	H-atom parameters constrained
Least-squares matrix: full	w = 1/[σ^2(Fo^2) + (0.0717P)^2 + 15.2811P] where P = (Fo^2 + 2Fc^2)/3
R[F^2 > 2σ(F^2)] = 0.054	(Δ/σ)max < 0.001
wR(F^2) = 0.140	Δρmax = 3.86 e Å^−3
S = 1.08	Δρmin = −3.24 e Å^−3
3502 reflections	Extinction correction: SHELXL97 (Sheldrick, 1997)
137 parameters	Extinction coefficient: 0.0030 (3)
0 restraints

Special details

Experimental. The few crystals isolated were not particularly well formed and showed evidence of not being single- a few spurious diffactions peaks and peaks showing shoulders. The final structure exhibits multiple unassigned electron density features within 1 Å of both the platinum and chlorine atoms.

10 reflections having 2θ between 12.82 and 32.77 degrees giving 360 ψ scans for parameter estimation

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)

- 0.2484 (0.0142) x - 0.7140 (0.0203) y + 11.7169 (0.0078) z = 3.3733 (0.0090)

* 0.0000 (0.0000) Pt2 * 0.0000 (0.0000) Cl23 * 0.0000 (0.0000) Cl32

Rms deviation of fitted atoms = 0.0000

0.1666 (0.0141) x + 2.7437 (0.0193) y + 11.3718 (0.0094) z = 3.7927 (0.0059)

Angle to previous plane (with approximate e.s.d.) = 19.90 (0.13)

* 0.0000 (0.0000) Pt3 * 0.0000 (0.0000) Cl23 * 0.0000 (0.0000) Cl32

Rms deviation of fitted atoms = 0.0000

- 0.0376 (0.0125) x + 1.0741 (0.0106) y + 11.7155 (0.0076) z = 3.9458 (0.0050)

Angle to previous plane (with approximate e.s.d.) = 9.70 (0.14)

* 0.0028 (0.0027) Pt2 * -0.0109 (0.0028) Pt3 * 0.3044 (0.0033) Cl2 * 0.3102 (0.0034) Cl3 * -0.3029 (0.0030) Cl23 * -0.3036 (0.0031) Cl32

Rms deviation of fitted atoms = 0.2493

- 0.1017 (0.0209) x + 0.7141 (0.0035) y + 11.7343 (0.0116) z = 11.6834 (0.0220)

Angle to previous plane (with approximate e.s.d.) = 2.05 (0.16)

* 0.0000 (0.0000) Pt1 * 0.0000 (0.0000) Cl11 * 0.0000 (0.0000) Cl11_$1

Rms deviation of fitted atoms = 0.0000

- 0.1017 (0.0209) x + 0.7141 (0.0035) y + 11.7343 (0.0116) z = 11.6834 (0.0220)

Angle to previous plane (with approximate e.s.d.) = 0.00 (0.19)

* 0.0000 (0.0000) Pt1_$1 * 0.0000 (0.0000) Cl11 * 0.0000 (0.0000) Cl11_$1

Rms deviation of fitted atoms = 0.0000

- 0.1032 (0.0192) x + 0.7215 (0.0147) y + 11.7325 (0.0097) z = 11.6810 (0.0192)

Angle to previous plane (with approximate e.s.d.) = 0.05 (0.18)

* 0.0013 (0.0025) Pt1 * -0.0013 (0.0025) Pt1_$1 * -0.0007 (0.0013) Cl1 * 0.0007 (0.0014) Cl11 * 0.0007 (0.0013) Cl1_$1 * -0.0007 (0.0014) Cl11_$1

Rms deviation of fitted atoms = 0.0009

3.2046 (0.0430) x - 7.0595 (0.0521) y + 2.2326 (0.2470) z = 2.6178 (0.2425)

Angle to previous plane (with approximate e.s.d.) = 87.90 (1.21)

* 0.0000 (0.0000) Pt1 * 0.0000 (0.0000) C11 * 0.0000 (0.0000) C12

Rms deviation of fitted atoms = 0.0000

- 0.1015 (0.0212) x + 0.7235 (0.0186) y + 11.7332 (0.0103) z = 11.6828 (0.0211)

Angle to previous plane (with approximate e.s.d.) = 87.90 (1.21)

* 0.0013 (0.0026) Pt1 * -0.0007 (0.0013) Cl1 * 0.0000 (0.0001) Cl11 * -0.0007 (0.0013) Cl11_$1

Rms deviation of fitted atoms = 0.0008

5.4046 (0.0316) x + 8.0081 (0.0511) y + 2.7407 (0.2779) z = 4.2011 (0.0831)

Angle to previous plane (with approximate e.s.d.) = 86.04 (1.36)

* 0.0000 (0.0001) Pt2 * 0.0000 (0.0001) C21 * 0.0000 (0.0000) C22

Rms deviation of fitted atoms = 0.0000

- 0.2622 (0.0125) x - 0.7660 (0.0207) y + 11.7074 (0.0068) z = 3.3593 (0.0073)

Angle to previous plane (with approximate e.s.d.) = 87.96 (1.36)

* -0.0070 (0.0027) Pt2 * 0.0036 (0.0014) Cl2 * 0.0036 (0.0014) Cl23 * -0.0002 (0.0001) Cl32

Rms deviation of fitted atoms = 0.0043

5.3896 (0.0286) x + 7.8027 (0.0677) y + 0.3253 (0.2328) z = 1.0068 (0.0793)

Angle to previous plane (with approximate e.s.d.) = 76.27 (1.17)

* 0.0000 (0.0001) Pt3 * 0.0000 (0.0000) C31 * 0.0000 (0.0000) C32

Rms deviation of fitted atoms = 0.0000

0.2017 (0.0123) x + 2.8713 (0.0199) y + 11.3424 (0.0108) z = 3.8031 (0.0057)

Angle to previous plane (with approximate e.s.d.) = 88.61 (1.10)

* -0.0179 (0.0027) Pt3 * 0.0093 (0.0014) Cl3 * -0.0005 (0.0001) Cl23 * 0.0091 (0.0014) Cl32

Rms deviation of fitted atoms = 0.0111

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 (Ų)

	x	y	z	Uiso*/Ueq
Pt1	0.50253 (10)	0.17030 (6)	0.98966 (5)	0.03098 (19)
Cl1	0.2485 (8)	0.3697 (5)	0.9750 (5)	0.0527 (12)
Cl11	0.2524 (7)	0.0431 (5)	0.9952 (4)	0.0445 (10)
C11	0.752 (3)	0.263 (2)	0.9248 (19)	0.056 (5)
H11A	0.8938	0.2015	0.8895	0.067*
H11B	0.7140	0.3476	0.8840	0.067*
C12	0.701 (3)	0.2771 (19)	1.0430 (17)	0.046 (5)
H12A	0.6282	0.3695	1.0753	0.056*
H12B	0.8085	0.2229	1.0808	0.056*
Pt2	0.17340 (10)	0.30150 (7)	0.30995 (5)	0.0318 (2)
Pt3	0.22859 (10)	−0.04306 (7)	0.34055 (5)	0.0315 (2)
Cl2	0.3916 (8)	0.4329 (6)	0.3243 (5)	0.0574 (13)
Cl3	−0.0144 (8)	−0.1663 (6)	0.3785 (5)	0.0573 (13)
Cl23	−0.0320 (7)	0.1547 (5)	0.2967 (4)	0.0423 (10)
Cl32	0.4598 (6)	0.0964 (5)	0.3035 (4)	0.0406 (9)
C21	−0.108 (3)	0.471 (2)	0.3702 (18)	0.052 (5)
H21A	−0.2419	0.4481	0.4044	0.062*
H21B	−0.0883	0.5454	0.4093	0.062*
C22	−0.048 (3)	0.470 (2)	0.2542 (17)	0.051 (5)
H22A	0.0087	0.5446	0.2203	0.062*
H22B	−0.1447	0.4473	0.2154	0.062*
C31	0.493 (3)	−0.225 (2)	0.3172 (17)	0.046 (4)
H31A	0.4656	−0.3089	0.2983	0.055*
H31B	0.6333	−0.2160	0.2752	0.055*
C32	0.430 (3)	−0.186 (2)	0.4305 (16)	0.046 (4)
H32A	0.5294	−0.1518	0.4592	0.055*
H32B	0.3615	−0.2448	0.4823	0.055*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Pt1	0.0319 (3)	0.0189 (3)	0.0421 (3)	−0.0048 (2)	−0.0128 (2)	0.0047 (2)
Cl1	0.047 (3)	0.026 (2)	0.081 (3)	0.001 (2)	−0.025 (2)	0.013 (2)
Cl11	0.0291 (19)	0.023 (2)	0.082 (3)	−0.0028 (17)	−0.0217 (19)	0.006 (2)
C11	0.038 (10)	0.056 (14)	0.086 (15)	−0.033 (10)	−0.019 (10)	0.020 (11)
C12	0.044 (10)	0.024 (9)	0.076 (13)	0.000 (8)	−0.033 (9)	−0.008 (9)
Pt2	0.0305 (3)	0.0243 (3)	0.0434 (4)	−0.0096 (3)	−0.0127 (2)	0.0061 (2)
Pt3	0.0302 (3)	0.0240 (3)	0.0420 (3)	−0.0095 (3)	−0.0102 (2)	0.0022 (2)
Cl2	0.046 (3)	0.036 (3)	0.096 (4)	−0.018 (2)	−0.020 (3)	−0.003 (3)
Cl3	0.042 (2)	0.037 (3)	0.100 (4)	−0.024 (2)	−0.018 (2)	0.014 (3)
Cl23	0.037 (2)	0.032 (2)	0.067 (3)	−0.0145 (18)	−0.0242 (19)	0.0080 (19)
Cl32	0.0276 (18)	0.028 (2)	0.069 (3)	−0.0107 (17)	−0.0158 (17)	0.0055 (19)
C21	0.038 (9)	0.031 (11)	0.073 (13)	0.014 (8)	−0.016 (9)	−0.011 (9)
C22	0.050 (11)	0.048 (13)	0.059 (11)	−0.015 (10)	−0.022 (9)	0.031 (9)
C31	0.034 (9)	0.025 (10)	0.077 (13)	−0.003 (8)	−0.016 (9)	−0.001 (9)
C32	0.041 (10)	0.037 (11)	0.063 (11)	−0.012 (8)	−0.023 (8)	0.024 (9)

Geometric parameters (Å, º)

Pt1—C11	2.108 (18)	Pt3—Cl3	2.261 (5)
Pt1—C12	2.157 (18)	Pt3—Cl32	2.324 (4)
Pt1—Cl1	2.257 (5)	Pt3—Cl23	2.376 (4)
Pt1—Cl11^i	2.328 (4)	C21—C22	1.38 (3)
Pt1—Cl11	2.366 (5)	C21—H21A	0.9700
Cl11—Pt1^i	2.328 (4)	C21—H21B	0.9700
C11—C12	1.41 (3)	C22—H22A	0.9700
C11—H11A	0.9700	C22—H22B	0.9700
C11—H11B	0.9700	C31—C32	1.39 (3)
C12—H12A	0.9700	C31—H31A	0.9700
C12—H12B	0.9700	C31—H31B	0.9700
Pt2—C22	2.114 (19)	C32—H32A	0.9700
Pt2—C21	2.132 (17)	C32—H32B	0.9700
Pt2—Cl2	2.274 (5)	Pt1—Pt1^i	3.4539 (14)
Pt2—Cl23	2.325 (4)	Pt2—Pt3	3.4117 (10)
Pt2—Cl32	2.363 (4)	Pt1—Pt2^ii	4.0531 (10)
Pt3—C31	2.118 (18)	Pt1—Pt3^iii	4.0901 (10)
Pt3—C32	2.133 (17)	Pt3—Pt3^iv	4.2494 (14)
C11—Pt1—C12	38.5 (8)	C31—Pt3—Cl32	91.9 (6)
C11—Pt1—Cl1	90.9 (7)	C32—Pt3—Cl32	92.4 (6)
C12—Pt1—Cl1	92.3 (5)	Cl3—Pt3—Cl32	176.35 (17)
C11—Pt1—Cl11^i	92.7 (7)	C31—Pt3—Cl23	159.9 (6)
C12—Pt1—Cl11^i	91.3 (5)	C32—Pt3—Cl23	161.6 (6)
Cl1—Pt1—Cl11^i	176.20 (18)	Cl3—Pt3—Cl23	91.83 (18)
C11—Pt1—Cl11	159.9 (7)	Cl32—Pt3—Cl23	84.76 (15)
C12—Pt1—Cl11	161.3 (6)	Pt2—Cl23—Pt3	93.05 (14)
Cl1—Pt1—Cl11	90.94 (17)	Pt3—Cl32—Pt2	93.42 (14)
Cl11^i—Pt1—Cl11	85.26 (15)	C22—C21—Pt2	70.4 (11)
Pt1^i—Cl11—Pt1	94.74 (15)	C22—C21—H21A	116.6
C12—C11—Pt1	72.7 (11)	Pt2—C21—H21A	116.6
C12—C11—H11A	116.3	C22—C21—H21B	116.6
Pt1—C11—H11A	116.3	Pt2—C21—H21B	116.6
C12—C11—H11B	116.3	H21A—C21—H21B	113.6
Pt1—C11—H11B	116.3	C21—C22—Pt2	71.8 (10)
H11A—C11—H11B	113.3	C21—C22—H22A	116.4
C11—C12—Pt1	68.9 (10)	Pt2—C22—H22A	116.4
C11—C12—H12A	116.8	C21—C22—H22B	116.4
Pt1—C12—H12A	116.8	Pt2—C22—H22B	116.4
C11—C12—H12B	116.8	H22A—C22—H22B	113.4
Pt1—C12—H12B	116.8	C32—C31—Pt3	71.5 (10)
H12A—C12—H12B	113.8	C32—C31—H31A	116.4
C22—Pt2—C21	37.8 (8)	Pt3—C31—H31A	116.4
C22—Pt2—Cl2	92.1 (6)	C32—C31—H31B	116.4
C21—Pt2—Cl2	90.6 (6)	Pt3—C31—H31B	116.4
C22—Pt2—Cl23	91.5 (6)	H31A—C31—H31B	113.4
C21—Pt2—Cl23	92.7 (6)	C31—C32—Pt3	70.4 (10)
Cl2—Pt2—Cl23	176.34 (18)	C31—C32—H32A	116.6
C22—Pt2—Cl32	159.9 (6)	Pt3—C32—H32A	116.6
C21—Pt2—Cl32	162.0 (6)	C31—C32—H32B	116.6
Cl2—Pt2—Cl32	91.34 (17)	Pt3—C32—H32B	116.6
Cl23—Pt2—Cl32	85.03 (15)	H32A—C32—H32B	113.6
C31—Pt3—C32	38.1 (8)	Pt2^ii—Pt1—Pt3^iii	173.87 (2)
C31—Pt3—Cl3	91.8 (6)	Pt1^iii—Pt3—Pt3^iv	159.86 (3)
C32—Pt3—Cl3	90.5 (6)
C11—Pt1—Cl11—Pt1^i	84.8 (19)	C32—Pt3—Cl32—Pt2	−147.4 (6)
C12—Pt1—Cl11—Pt1^i	−80.1 (15)	Cl23—Pt3—Cl32—Pt2	14.44 (16)
Cl1—Pt1—Cl11—Pt1^i	179.90 (19)	C22—Pt2—Cl32—Pt3	−95.5 (18)
Cl11^i—Pt1—Cl11—Pt1^i	0.0	C21—Pt2—Cl32—Pt3	69 (2)
Cl1—Pt1—C11—C12	92.6 (11)	Cl2—Pt2—Cl32—Pt3	164.7 (2)
Cl11^i—Pt1—C11—C12	−88.8 (11)	Cl23—Pt2—Cl32—Pt3	−14.76 (17)
Cl11—Pt1—C11—C12	−172.3 (13)	Cl2—Pt2—C21—C22	92.6 (13)
Cl1—Pt1—C12—C11	−88.5 (12)	Cl23—Pt2—C21—C22	−89.0 (13)
Cl11^i—Pt1—C12—C11	92.6 (12)	Cl32—Pt2—C21—C22	−171.2 (15)
Cl11—Pt1—C12—C11	171.7 (14)	Cl2—Pt2—C22—C21	−88.3 (13)
C22—Pt2—Cl23—Pt3	174.6 (6)	Cl23—Pt2—C22—C21	92.4 (13)
C21—Pt2—Cl23—Pt3	−147.7 (6)	Cl32—Pt2—C22—C21	172.1 (14)
Cl32—Pt2—Cl23—Pt3	14.42 (16)	Cl3—Pt3—C31—C32	−88.4 (11)
C31—Pt3—Cl23—Pt2	−95.7 (16)	Cl32—Pt3—C31—C32	91.5 (11)
C32—Pt3—Cl23—Pt2	67.0 (18)	Cl23—Pt3—C31—C32	171.3 (13)
Cl3—Pt3—Cl23—Pt2	164.0 (2)	Cl3—Pt3—C32—C31	92.3 (11)
Cl32—Pt3—Cl23—Pt2	−14.67 (17)	Cl32—Pt3—C32—C31	−90.0 (11)
C31—Pt3—Cl32—Pt2	174.5 (6)	Cl23—Pt3—C32—C31	−170.4 (14)

Symmetry codes: (i) −x+1, −y, −z+2; (ii) x, y, z+1; (iii) −x+1, −y, −z+1; (iv) −x, −y, −z+1.

Hydrogen-bond geometry (Å, º)

D—H···A	D—H	H···A	D···A	D—H···A
C31—H31A···Cl2^v	0.97	2.79	3.71 (2)	159

Symmetry code: (v) x, y−1, z.