Crystal and molecular structure of carbonylnitrosyl(p-tolyl isocyanide)bis(triphenylphosphine)osmium(0) perchlorate

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= 13.257(4), b= 21.48(2), c= 14.820(6)Å, and β= 99.33(2)°. Least-squares refinement has led to a final R of 0.072 for 2 433 observed reflections. The co-ordination geometry about osmium is that of a trigonal bi-pyramid with carbonyl, nitrosyl, and isocyanide groups in the trigonal plane; the triphenylphosphine groups occupy apical positions. All three ligands of the trigonal plane are bound linearly to the osmium.