Structural features of methyltriphenylphosphonium (dimethylsulfoxido)pentabromoplatinate

Methyltriphenylphosphonium (dimethylsulfoxido)pentabromoplatinate [Ph3PCH3][PtBr5(dmso)] (1) has been obtained by recrystallization of methyltriphenylphosphonium hexabromoplatinate from dimethyl sulfoxide, yielding 85%. Complex 1 has been characterized by X-ray structural analysis. The X-ray structural analysis of the complex has been carried out on an automatic four-circle D8 Quest Bruker diffractometer (МоКα-radiation, λ = 0.71073 Å, graphite monochromator) at 293 K. Crystallographic characteristics of complex 1: monoclinic syngony, space group P21, a = 12.51(5), b = 12.80(5), c = 16.44(7) Å, a = 90.00 deg., β = 93.98(12) deg., g = 90.00 deg., V = 2626(19) Å3, Z = 4, rcalc = 2.403 g/cm3, F(000) = 1768.0, crystal size 0.36 × 0.26 × 0.15 mm, reflection index intervals -16 ≤ h ≤ 16, -17 ≤ k ≤ 17, -22 ≤ l ≤ 22, total reflections 80827, independent reflections 13179 (Rint = 0.1591), number of refined parameters 547, GOOF 1.279, R1 = 0.1630, wR2 = 0.2098 (R-factors for all reflections), R1 = 0.1202, wR2 = 0.1936 (F2 > 2s(F2), residual electron density (max/min) 4.29/-5.04 e/Å3. According to the X-ray diffraction data, the crystal of compound 1 contains two types of crystallographically independent cations and anions, the geometric parameters of which are slightly different. The dimethyl sulfoxide molecule is embedded in the platinum coordination sphere. The parameters of the coordinated dimethyl sulfoxide ligand differ from the free dimethyl sulfoxide molecule