| Abstract |
[MCpBz(CO)(3)](2) (M = Mo 3, W 4; CpBz = pentabenzylcyclopentadienyl) complexes were prepared by reaction of Li[MCpBz(CO)(3)] [M = Mo (1), W (2)] with Fe-III. [MoCpBz(CO)(2)](2) (5) can be prepared by thermal elimination of CO from 3 and also by reaction of 1 with C3H5Br. The steric bulk of the CpBz ligands causes all the dimers to exist either in the solid state or in solution as the trans isomers. The hydrido complexes [MH(CpBz)(CO)(3)] [M = Mo (6), W (7)] were prepared by reactions of 1 and 2 with H+. Cyclic voltammetry and controlled potential coulometry of 5 in CH2Cl2, thf and CH3CN were performed and mechanisms for the redox behaviour are proposed. (c) Wiley-VCH Verlag GmbH \& Co. KGaA, 69451 Weinheim, Germany, 2007. |
