REACTIVITY OF A CYCLOPENTADIENYL CONTAINING HETEROBIMETALLIC ALKOXIDE

The synthesis of the new heteroleptic heterotrimetallic cluster, [(C5H 5)Sn(mu-OBut)(2)Ge(OBut)Mo(CO)(5)] (1) has been achieved by a thermall y induced CO substitution of the transition metal derivative, Mo(CO)(6 ), by the basic germanium atom of the cyclopentadienyl heterobimetalli c alkoxide, [(C5H5)Sn(mu-OBut)(2)Ge(OBut)]. The microanalysis, molecul ar weight (monomer in benzene), IR and multinuclear NMR data and X-ray diffraction study is consistent with the formulation of 1. The Sn ato m has a trigonal pyramidal coordination environment formed by a aysmmt erically pi-bonded terminal C5H5 ring and two symmetrically bridged te rt-butoxy groups. The four-coordinate Ge atom lies at the centre of a distorted tetrahedron and is terminally attached to a tert-butoxy grou p and a Mo(CO)(S)(-)fragment.