Synthesis and crystal structure of [Mo₂FePt(μ-σ,σ′,σ″:η⁵-CC₅H₄)₂(CO)₄{HB(pz)₃}2][HB(pz)₃ = Hydrotris(pyrazol-1-yl)borate]; A complex derived from a 1,1′-ferrocene derivative with CMo(CO)₂{HB(pz)₃} substituents

Abstract

Treatment of [Mo(CO)6] in tetrahydrofuran, with 1,1′-dilithioferrocene in light petroleum, followed by (CF3CO)2O and tmeda (Me2NCH2CH2NMe2) affords the ferrocene- substituted bis(alkylidynemolybdenum) complex [Mo2Fe(μ-σ, σ′,:η5-CC5H4)2(O2CCF3)2 (CO)4(tmeda)2]. The latter with K[HB(pz)3] [HB(pz)3 = hydrotris(pyrazol-1-yl)borate] in CH2Cl2 gives [Mo2Fe(μ-σ,σ′:gh5 -CC5H4)2(CO)4{HB(pz)3}2], which with [Pt(cod)2] (cod = cyclo-octa-1,5-diene), in light petroleum saturated with ethylene, yields the tetranuclear metal complex [Mo2FePt(μ-σ,σ′,δ″:η5-CC5H4)2(CO)4{HB(pz)3}2]. The structure of this product was established by X-ray diffraction, and the results of this study are compared with those obtained for related compounds in which the two metal-metal bonds of an acyclic trimetal system, in this case MoPtMo, are each spanned by an alkylidyne group and semi-bridged by a carbonyl ligand. Show more