Dicarbonylbiscyclopentadienylzirconium(II): the carbonylation of metal tetrahydroborate derivatives as a route to metal carbonyls
Abstract
The carbonylation of the tetrahydroboratobiscyclopentadienyl derivatives of titanium(III) and zirconium(IV), [(cp)2Ti(BH4)] and [(cp)2Zr(BH4)]2, in the presence of triethylamine, gave the corresponding dicarbonyls [(cp)2Ti(CO)2] and [(cp)2Zr(CO)2], the latter being the first reported carbonyl of zirconium and an authentic stable complex of zirconium(II).