cis-DICARBONYL-η-1-SILACYCLOHEXA-2,4-DIEN-MOLYBDAEN(0) UND -WOLFRAM(0)-KOMPLEXE, DIMERE 4-ALKYL-1-SILACYCLOHEXA-1,3-DIENE MIT 1,3-DISILACYCLOBUTANSTRUKTUR, UND 2,2'-DI-1-SILACYCLOHEXA-2,4-DIENE

Article abstract of DOI:10.1016/S0022-328X(00)90532-1

1,1-Dialkyl(aryl)-1-silacyclohexa-2,4-dienes react with tris(acetonitrile)-molybdenum tricarbonyl and -tungsten tricarbonyl to give the corresponding dicarbonyl complexes with two silacyclohexadiene ligands.Complexes with functional groups at the silicon atom (chlorine, alkoxy) can be prepared analogously. 1,6-Dichloro-1-methyl-4-cyclohexyl-1-silacyclohexa-2,4-diene reacts with (CH3CN3)3Mo(CO)3 similarly to the dimerisation of the ?-allyl complexes, by dehalogenation and dimerisation at C(6). 1H-1-Methyl-4-cyclohexyl-1-silacyclohexa-2,4-diene dimerizes with (CH3CN)3Mo(CO)3, probably with the isomeric 1-silacyclohexa-1,3-diene as intermediate, to give a 1,3-disilacyclobutane derivative.