Reactions of cationic iron P-coordinated (diphenylphosphino) alkynes with dicobalt octacarbonyl

Article abstract of DOI:10.1016/0022-328X(95)05662-9

Reaction of the P-coordinated transition metal complexes [(Fp)Ph₂PC≡CR][BF₄] (R = H, CH₃, Ph, p-tolyl; Fp = CpFe(CO)₂) with cobalt octacarbonyl at room temperature affords the cationic heterometallic complexes [(Fp)Ph₂PC≡CR{Co₂(CO)₆}][BF₄] (1-4) in high yields. A single-crystal X-ray structural analysis of 3 showed that the hexacarbonyldicobalt fragment is π-bonded to the alkynyl group of the P-coordinated (diphenylphosphino)alkyne without significant interaction between the iron and cobalt fragments. Spectroscopic data for 1-4 and structural data for 3 suggest that the positive charge is mainly located on the iron fragment.