The chemistry of (1–2 : 5–6-η-cyclo-octa-1,5-diene)(1–6-η-cyclo-octa-1,3,5-triene)ruthenium(0) : preparation and X-ray crystal structure of (1–2 : 5–6-η-cyclo-octa-1,5-diene)(1–4-η-cyclo-octa-1,3,5-triene)(trimethyl phosphite)ruthenium(0)

Abstract

The reaction of (1–2 : 5–6-η-cyclo-octa-1,5-diene)(1–6-η-cyclo-octa-1,3,5-triene)ruthenium with P(OMe)₃ yielded the title compound which has been structurally characterized by X-ray diffraction studies. The complex crystallizes in the monoclinic space group P2₁/n with unit-cell dimensions a= 13.306(5), b= 9.628(3), c= 16.382(20)Å, β= 111.62(6)°, and Z= 4. The co-ordination geometry around the ruthenium is a distorted square pyramid whose vertices are occupied by the phosphite ligand, the butadiene moiety of cyclo-octatriene, and the two double bonds of cyclo-octadiene.