Synthesis and reactivity of cationic alkene–alkyne molybdenum complexes; structural evidence for the formation of an η3,η3-bonded hexatriene ligand by coupling of a co-ordinated alkyne and a 1,3-diene
Abstract
The synthesis and reactions of the simple alkene/(4e)–alkyne complex [Mo(η2-C2H4)(η2-MeC2Me)(CO)(η-C5H5)][BF4] is described; reaction with isoprene leads to a novel coupling reaction and the formation of an η3,η3-bonded hexatriene cation identified by X-ray crystallography.