Synthesis of secondary allenylidene-molybdenum complexes with a ferrocenyl substituent from carbenium ions species stabilized by two organometallic moieties

Abstract

The monoallenylidene complex [Cp 2Mo 2(CO) 4{ μ− σ: η 2−CCC(Fc)(H)}] ( 5) and the diallenylidene complex [{Cp 2Mo 2(CO 4( μ− σ: η 2−CCC(H))} 2Fc] ( 6) have been obtained from the corresponding monocarbenium ion [Cp 2Mo 2(CO) 4{ μ− η 2: η 3−HCCC(H)(Fc)}][BF 4] and the dicarbenium ion [{Cp 2Mo 2(Co) 4( μ− η 2: η 3−HCCC(H)} 2Fc] [{BF 4} 2] ( 4) respectively, and their spectroscopic data are determined.