Crystal structure of osmocene, Os(η-C5H5)2

Abstract

Crystals of osmocene, Os(η-C5H5)2, are orthohombic:Pnma, Mr=321.3, a=7.079(2), b=8.908(1), c=12.771(2), Vc=806 Å3, Z=4, Dx=2.640 g cm-3, Mo Kα (λ=0.71069 Å), μ=151 cm-1, F(000)=584, T=293 K, R=0.04 for 730 observed reflections. Osmocene is isomorphous with ruthenocene and the molecules have average D5h symmetry with a mean Os-C distance of 2.19(1) Å (compared with 2.186 Å forRu-C). © 1986 Plenum Publishing Corporation.