Reaktionen von Dicarbonyl (η-cyclopentadienyl)(propiolsäuremethylester)niangan(I) mit Basen. Isolierung von Vinyliden- und Carbenkomplexen / Reactions of Dicarbonyl(η-cyclopentadienyl)(methylpropiolate)manganese(I) with Bases The Isolation of Vinylidene and Carbene Complexes

Abstract

Abstract Reaction of dicarbonyl(η-cyclopentadienyl)(methylpropiolate)manganese(I) with various stoichiometric quantities of tert-butyl lithium and subsequent addition of HCl or CH3OSO2F allows the isolation of vinylidene complexes of the general type CpMn(CO)2=C=CR1R2 R1=H, CH3; R2 = COOCH3, COt-Bu, COH(t-Bu)2). The compound with R1=H, R2=COOCH3 adds another CpMn(CO)2 fragment, with formation of a bridged vinylidene species with a Cp2Mn2(CO)4 unit. The reaction with amide or methoxide leads to the formation of carbene complexes CpMn(CO)2 = C(R1)CH2-COOCH3 (Rx = NH2, OCH3).