Thiocarbonyl complexes of iron: formation of dinuclear compounds by the phosphine-induced CO-CS coupling in the reaction of Fe(CO)4CS with P(NMe2)3. Molecular structure of Fe2(CO)6S2COCP(NMe2)3
作者:Wolfgang Petz、Frank Weller
DOI:10.1021/om00034a044
日期:1993.10
Slow addition of Fe(CO)4CS to an excess of P(NMe2)3 affords the dinuclear complexes Fe2(CO)6S2COCP(NMe2)3 (1) and Fe2(CO)5(P(NMe2)3)S2COCP(NMe2)3 (2), the mononuclear complex (Fe(CO)2(P(NMe2)3)S2COCP(NMe2)3(3), and the sulfur transfer product S=P(NMe2)3 (4). The iron compounds contain a new betaine-like ligand which is composed of P(NMe2)3, CS, CO, and an additional S atom and bonded to the iron atoms via the sulfur atoms: C-C bond formation between the CS group and one CO ligand has occurred. Complex 1 crystallizes in the space group Pbca with cell parameters a = 1513.3(3) pm, b = 1324.3(1) pm, c = 2278.4(2) pm, and Z = 8. The dinuclear compounds 1 and 2 have a butterfly structure, and the ligand acts as a six-electron donor. P-31, C-13, and H-1 NMR and IR spectra are in accord with the structures.