Fe2(CO)6(m-RS)[m-EtOC(O)CH2S] (I; R = Me, Et, Pr, CHMe2, Bu, CMe3, Ph, PhCH2, CH2:CHCH2, cyclopentyl, cyclohexyl) were prepared by reductive cleavage of an S-S bond of Fe2(m-S2)(CO)6 with Grignard reagents, followed by nucleophilic substitution of the intermediates, Fe2(m-SR)(m-SMgX)(CO)6 (II) with ClCH2C(O)OEt. I were also prepared by CF3CO2H-acidolysis of II, followed by condensation of Fe2(m-RS)(m-HS)(CO)6 with ClCH2C(O)OEt in the presence of Et3N. For the former method, however, the manipulation is more convenient. Conformational anal., indicates that I is a mixture of either 3 conformers (ae, ee, and ea) or 2 conformers in a given ratio.

Key words: ACETIC ACID ESTER, SUBSTITUTION REACTION, IRON COMPLEX, CARBONYL COMPLEX, ORGANO CHLORIDE COMPOUNDS, CLUSTER COMPOUND, NUCLEOPHILIC REACTION, SULFIDE COMPLEX, BRIDGE COMPOUNDS, CONFORMATION