Bis[1,3-bis(trimethylsilyl)allyl]cobalt(II), a stable electron-deficient allyl complex.

Abstract

The title compound, bis[(1,2,3-η)-(2E)-1,3-bis(trimethylsilyl)-prop-2-enyl]cobalt(II), [Co(C 9 H 21 Si 2 ) 2 ], is a homoleptic allyl complex with η 3 -bound ligands. The Co-C distances range from 1.996 (3) to 2.096 (3) A and the allyl ligands adopt staggered, nearly parallel, arrangements around the Co atom. The trimethylsilyl groups are in syn-anti conformations; the steric shielding they provide to the metal is probably responsible for the thermal stability of the compound.