Notes. Preparation of some metallodithiocarboxylato- and metallodithiocarbene- metal complexes

Abstract

The reaction between the carbon disulphide adduct of dicarbonyl(cyclopentadienyl)iron, [(cp)(CO)2FeCS2]–(cp =η5-C5H5), and [M(CO)5Br](M = Mn or Re) produces in good yield the heterodinuclear complexes [(cp)(CO)2FeCS2M(CO)4] in which the CS2 group acts as a bridge in the unit FeC([graphic omitted]. Depending on the reaction conditions, both the chelato-complex [(cp)(CO)2FeC([graphic omitted](CO)4] and the unidentate [(cp)(CO)2FeC(S)SRe(CO)5] derivative are obtained. Alkylation of the thione sulphur atom in the unit FeC(S)SRe produces the dithiocarbene [(cp)(CO)2FeC(SCH3)SRe(CO)5]+ in good yield. The reaction of this metallodithiocarbenemetal complex with methylamine yields [(cp)(CO)2FeC(S)(SCH3)] and [Re(CO)4(NH2CH3)(CONHCH3)]. The compounds [(cp)(CO)2FeC(S)(SCH3)] and [Re(CO)5Br] were formed from the reaction of [(cp)(CO)2FeC(SCH3)SRe(CO)5]+ with LiBr.