Mixed cyclopentadienyl/dithiolene complexes

Heteroleptic metal complexes with both cyclopentadienyl and dithiolene Ligands are organized into four different classes of different Cp/dithiolene ratio: 2:1 complexes, of general formula Cp2M(dithiolene)(0,+1) (M = Ti, Zr, Hf, V, Nh, Mo, W); 1:2 complexes, of general formula CpM(dithiolene)(2)(-1,0) (M = Ti, V, Ta, Mo, W, Re); 1:1 complexes, of general formula CpM(dithiolene) (M = Co, Rh, Ir, Ni); bimetallic 1:1 complexes of general formula [CpM(dithiolene)](2) (M = V, Cr, Mo, Fe, Ru). The synthetic procedures, electrochemical properties, structural characteristics, NMR data, magnetic properties and reactivity of those classes of complexes are described and compared, with particular attention to the geometrical changes upon electron count and the effects of the non-innocent character of the dithiolene ligands on the structures and reactivity of the complexes. (C) 1998 Elsevier Science S.A. All rights reserved.