Polynuclear selenido–carbonyl manganese complexes derived from tertiary phosphine selenides

The reactions of some phosphine selenides with mononuclear and dinuclear manganese complexes have been investigated. The reactions of Cp′Mn(CO)2(THF) (1) with bis(diphenylphosphino)ethane diselenide (dppeSe2) affords [(Cp′Mn)2(μ-Se)2(CO)2(dppe)] (4), identified by spectroscopic techniques. Complex CpMn(CO)2(THF) (2), by reacting with bis(diphenylphsphino)methane monoselenide (dppmSe) gives a variety of products, [(CpMn)2(μ-Se)2(CO)3(dppm)] (5), [CpMn(CO)2(dppm)] (6), [(CpMn)2(CO)4(μ-dppm)] (7), [CpMn(CO)2(dppmSe)] (8) have been identified (Cp=η5-C5H5, Cp′=η5-C5H4Me, THF=tetrahydrofuran). Finally the reactions of [Mn2(CO)8(MeCN)2] (3) with diphenylmethylphosphine selenide (dpmpSe) and triphenylphosphine selenide (tppSe) afford clusters with molecular formula [Mn4(μ3-Se)2(μ-CO)(CO)14(dpmp)2] (9) and [Mn4(μ3-Se)2(μ-CO)(CO)14(tpp)2] (10), respectively. The structure of 9 has been determined by X-ray diffraction methods.