Crystal and molecular structure of dicarbonylnitrosylbis(triphenylphosphine)osmium(0) perchlorate–dichloromethane

Abstract

The crystal and molecular structure of the title compound has been determined from three-dimensional X-ray data collected by counter methods. Crystals are monoclinic. space group P2₁/n, with Z= 4 in a unit cell of dimensions a= 17.031(2), b= 13.951(1), c= 17.270(1)Å, and β= 104.33(1)°. Block-diagonal least-squares refinement gave R 0.057 for 4 281 observed reflections. The co-ordination geometry about osmium is that of a trigonal bipyramid with the two triphenylphosphine groups apical. The trigonal plane is formed by the linear nitrosyl and two carbonyl ligands. As a result of statistical disordering in this basal plane it has not been possible to differentiate between the NO and CO groups.