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.