Crystal structure of tetraethylammonium µ-chloro-abefh-pentachloro-µ-nitrosyl-nitrosyldiplatinate(II)

Abstract

The crystal structure of the title compound has been determined by the heavy-atom method from diffractometer X-ray data and refined by full-matrix least-squares to R 0·07 for 1688 observed reflections. Crystals are monoclinic, space group P2₁/c, a= 20·704(2), b= 10·390(1), c= 14·408(2)Å, β= 106·99(1)°. The novel anion consists of two platinum atoms in square planar and octahedral environments respectively bridged by a chlorine atom and a nitrosyl group, the other nitrosyl group being terminal and equatorial in the co-ordination sphere of the octahedral platinum, cis to the bridging nitrosyl and bent towards it (0 ⋯ 0′ 2·71 Å, Pt–N–O, 122(5)°). The Pt–Cl bridging bond trans to the terminal nitrosyl is significantly longer than the remaining Pt–Cl distances [2·64(1), cf. 2·33 (mean)Å]. The N–O bond of the bridging nitrosyl is significantly longer than that of the terminal nitrosyl group [1·27(5), 1·05(6)Å].