A formal insertion reaction of tricarbonyl-π-tetramethylcyclobutadieneiron with 1,1,1-trifluoroethylidene; ring-expansion reactions of π-cyclobutenyliron complexes
Abstract
U.v. irradiation of [Fe(CO)3pi;-C4Me4] with C2F3H affords as one of the products an adduct (II) containing a bridging CH(CF3) group; thermolysis of (II) leads to C4 to C5 ring-expansion reactions with the formation of [Fe(CO)2π-C5Me4CF3]2 and a ketonic C5π-allylic complex.