Reactions between W2I4(CO)8 and phosphines Under forcing conditions: Attempted decarbonylation to tungsten(II) dimers with Quadruple metal-metal bond x-ray molecular structure of WI2(CO)(dppm)2

F. Albert Cotton (1) , Larry Falvello (1) , Rinaldo Poli (1)

1 Texas A&M University [College Station]

The reactions of W2I4(CO)8 with bis(diphenylphosphino)methane (dppm) and PMe3 have been studied under forcing conditions. From the dppm reaction a monocarbonyl compound has been isolated, which crystallizes as 3WI2(CO)(dppm)2x2 toluene. Crystal data: space group C2/c, a = 31.141(8), b = 25.447(7), c = 20.135(6)Å, β = 104.89(4)°, V = 15420(20)Å3, Z = 4, R = 0.0538 for 4367 data with F02 > 3σ(F02). The PMe3 reaction afforded WI2(CO)2(PMe3)3 as the major product. No derivatives containing a metal-metal quadruple bond were detected in solution.

Domaines: Chimie de coordination

F. Albert Cotton, Larry Falvello, Rinaldo Poli. Reactions between W2I4(CO)8 and phosphines Under forcing conditions: Attempted decarbonylation to tungsten(II) dimers with Quadruple metal-metal bond x-ray molecular structure of WI2(CO)(dppm)2. Polyhedron, 1987, 6 (5), pp.1135-1142. ⟨10.1016/S0277-5387(00)80967-5⟩. ⟨hal-03545054⟩