Preparations of novel half-sandwich iron carbonyl phosphine complexes: Intramolecular link between the cyclopentadienyl and the phosphine ligand

Abstract

The novel iron half-sandwich complex ( η 5: η 10C 5H 4CH 2PPh 2)Fe(CO)Cl ( 4), in which the ligating phosphine was connected to the cyclopentadienyl ring, was prepared by reacting the LiC 5H 4CH 2CH 2PPh 2 ( 2) with FeCl 2 followed by CO bubbling. Reaction of 4 with sp-, sp 2- and sp 3-hybridized carbon nucleophiles provided formal substitution product ( η 5: η 1-C 5H 4CH 2CH 2PPh 2)Fe(CO)R ( 5). Solid state structures of the methyl complex 5a, phenylacetylide 5g and trimethylsilylacetylide 5j were characterized by single-crystal X-ray analyses.