ISOMER DIFFERENTIATION BY TRI-OSMIUM CLUSTER COMPLEXATION OF SUBSTITUTED 1,3-CYCLOHEXADIENES

Citation
Sl. Ingham et al., ISOMER DIFFERENTIATION BY TRI-OSMIUM CLUSTER COMPLEXATION OF SUBSTITUTED 1,3-CYCLOHEXADIENES, Journal of organometallic chemistry, 531(1-2), 1997, pp. 237-242
Citations number
31
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
ISSN journal
0022328X
Volume
531
Issue
1-2
Year of publication
1997
Pages
237 - 242
Database
ISI
SICI code
0022-328X(1997)531:1-2<237:IDBTCC>2.0.ZU;2-V
Abstract
A series of methyl- and dimethyl-substituted 1,3-cyclohexadienes have been prepared from their aromatic analogues via Birch reduction and su bsequent isomerisation with Fe(CO)(3) fragments. These ligands were re acted with [Os-3(CO)(10)(CH3CN)(2)] to form tri-osmium decacarbonyl cl uster compounds containing the eta(4)-coordinated substituted 1,3-cycl ohexadienes. The various isomers of the substituted dienes show a dram atic difference in their reactivity towards the tri-osmium cluster and it is likely that this is due to the steric interactions between the methyl substituents and the cluster framework, with this effect being more marked for the di-substituted ligands.