Polynuclear selenido–carbonyl manganese complexes derived from tertiary phosphine selenides

Abstract

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 (dppeSe 2) 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=η 5-C 5H 5, Cp′=η 5-C 5H 4Me, THF=tetrahydrofuran). Finally the reactions of [Mn 2(CO) 8(MeCN) 2] ( 3) with diphenylmethylphosphine selenide (dpmpSe) and triphenylphosphine selenide (tppSe) afford clusters with molecular formula [Mn 4(μ 3-Se) 2(μ-CO)(CO) 14(dpmp) 2] ( 9) and [Mn 4(μ 3-Se) 2(μ-CO)(CO) 14(tpp) 2] ( 10), respectively. The structure of 9 has been determined by X-ray diffraction methods.