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

Article abstract of DOI:10.1016/0022-328X(95)05542-W

The novel iron half-sandwich complex (η⁵:η¹-C5H4CH2CH2PPh2)Fe(CO)Cl (4), in which the ligating phosphine was connected to the cyclopentadienyl ring, was prepared by reacting the LiC5H4CH2CH2PPh2 (2) with FeCl2 followed by CO bubbling.Reaction of 4 with sp-, sp²- and sp³-hybridized carbon nucleophiles provided formal substitution product (η⁵:η¹-C5H4CH2CH2PPh2)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.Keywords: Iron; Alkyl; Alkyne; Cyclopentadienyl; Phosphine; Vinyl