INTERACTION OF HYDROGEN AND HYDROCARBONS WITH TRANSITION-METALS - NEUTRON-DIFFRACTION STUDY OF THE CRYSTAL AND MOLECULAR-STRUCTURE OF (MU-H)2OS3(CO)10(MU-CH2)

The crystal and molecular structure of (μ-H)2Os3(CO)10(μ-CH2) has been determined by using single-crystal neutron diffraction. The complex crystallizes in the orthorhombic space group Pn21a with lattice parameters at 110 K of a=18.502 (9), b=10.096 (5), and c=8.763 (4) Å. The molecule consists of a triangular array of Os atoms with one nonbridged edge (Os-Os=2.855 (3) Å), one edge bridged by a single hydride (Os-Os=3.053 (3) Å), and a third edge doubly bridged by a hydride atom and a methylene ligand (Os-Os=2.824 (3) Å). The complex contains no terminal hydride ligands. The methylene carbon atom has a distorted tetrahedral geometry with an Os-C-Os angle of 82.1 (1)° and a H-C-H angle of 106.0 (8)°. © 1979, American Chemical Society. All rights reserved.