Synthesis and structure of the organometallic MFe2(mu(3)-S)(2) clusters (M = Mo or Fe)

초록

New organometallic clusters with the MFe2(mu(3)-S)(2) core (M = Mo or Fe) have been synthesized from inorganic [MoFe3S4] or [Fe4S4] clusters under high pressure CO. The reaction of (Cl-4-cat)(2)Mo2Fe6S8(PR3)(6) [R = Et, Pr-n] with high pressure CO produced the crystalline [MoFe2S2](4+) clusters, (Cl-4-cat)Mo(O)Fe2S2(CO)(n)(PR3)(6-n) [n = 4, Et = I, Pr-n = II; n = 5, Et = III] after ash column chromatography. The similar [MoFe2S2](4+) cluster, (Cl-4-cat)(2)Mo-Fe2S2(CO)(2)(depe)(2) ( IV), also has been achieved by the reactions of (Cl-4-cat)MoFe3S3(CO)(6)(PEt3)(2) with depe by reductive decoupling of the cluster. For the [Fe-3(mu(3)-S)(2)](4+) cluster, [Fe4S4(PcHex(3))(4)] (BPh4) was reacted with high pressure CO to produce a new Fe3S2(CO)(7)(PcHex)(2) (V) compound. These reactions generalized the preparation of organometallic compounds from inorganic clusters. All the compounds have been characterized by single crystal X-ray crystallography. A possible reaction pathway for the synthesis of the MFe2(mu(3)-S)(2) clusters (M = Mo or Fe) has also been suggested.

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