Some chemistry of ethyltetramethylcyclopentadienylcobalt: arene, ethylene, butadiene, ammine, tertiary phosphine, and chloro-derivatives

Abstract

Tri-n-butyl(ethyltetramethylcyclopentadienyl)tin, Sn(etmcp)Buⁿ₃, reacts with cobalt(II) chloride to give, after treatment with chlorine, [{Co(etmcp)Cl(µ-Cl)}₂] and [Co₃(etmcp)₂Cl₆]. Using these compounds as precursors, many derivatives of the Co(η-etmcp) system have been prepared; examples are [(η-etmcp)Co(µ-Cl)₃Co(η-etmcp)][FeCl₄], [Co(η-etmcp)(PPh₃)Cl₂], [Co(η-etmcp)L₂Cl][PF₆][L₂= Ph₂P(CH₂)₂PPh₂, or (PMe₂Ph)₂], [Co(η-etmcp)L₃][PF₆][L₃=(NH₃)₃, (MeCN)₃, (MeCN)₂(Me₂CNH), (CH₂CHCN)₃, η-benzene, or η-toluene], and [Co(η-etmcp)L₂][L₂=(η-C₂H₄)₂, butadiene, or 1,5-C₈H₁₂].