SYNTHESIS AND STRUCTURAL STUDIES ON UNSYMMETRICAL TYPE OF DI-(μ-ALKYLTHIO)HEXACARBONYLDIIRON COMPLEXES CONTAINING CYCLOHEXYL OR BENZYL GROUP

Twenty new Fe-S cluster complexes having a general formula (μ-RS) (μ-R'S)-Fe_2(CO)_6 were synthe-sized through reduction of -S_2Fe_2(CO)_6 with RMgC1, followed by in situ nucleophilic substitution of RXwith the intermediates (μ-RS)(μ-C1MgS)Fe_2(CO)_6. Besides the data of m.p., C/H, IR and ~1H NMRdetermined, the conformers of these complexes and the ratios of the conformers have been discussed ac-cording to the chemical shifts and integrated values of methyl, methylene and methyne groups attachedto the sulfur atoms in the complexes.