Synthesis and crystal structure of cyclopentadienyl(1,4-dimethyl-1,4-dibora-2,5-cyclohexadiene)cobalt |
| |
Authors: | Gerhard E Herberich Bernd Hessner Simon Beswetherick Judith AK Howard Peter Woodward |
| |
Institution: | Institut für Anorganische Chemie der Technischen Hochschule Aachen, Professor-Pirlet-Str. 1, D-5100 Aachen F.R.G.;Department of Inorganic Chemistry, The University, Bristol BS8 1TS Great Britain |
| |
Abstract: | The synthesis of the organometallic derivative cyclopentadienyl(1,4-dimethyl-1,4-diboracyclohexa-2,5-diene)cobalt is described. This complex, (CH3BC4H4BCH3)Co(η-C5H5)], forms red-oranged monoclinic crystals, space group P21/a with Z = 4 in a unit cell of dimensions a 11.362(7), b, 7.467(7), c 13.290(12) Å, β 103.76(6)°. The structure has been elucidated by heavy-atom methods from 1732 reflections (I > 2σ(I)) measured on a Syntex P21 four-circle diffractometer and refined to R = 0.055. In the coordination complex all six atoms of the cyclohexadiene ring are within bonding distance of the metal atom, but the two boron atoms bend away from the metal atom, and the ring elongates slightly in the B---B direction. As a standard of comparison the known geometry of the free ligand 1,4-difluoro-1,4-dibora-2,3,5,6-tetramethylcyclohexa-2,5-diene] is used. The terminal methyl groups on the boron atoms, by contrast, bend slightly back towards the metal atom. The cyclopentadienyl ring remains planar but is positionally disordered. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|