Preparation and reactions of [Fe(Ph2PCH2PPh2-P)(CO)(COMe)(η5-C5H5)] and its derivatives

Abstract

Treatment of [Fe(CO)₂Me(η⁵-C₅H₅)] with Ph₂PCH₂PPh₂(dppm) gave the yellow complex [Fe(dppm-P)(CO)(COMe)(η⁵-C₅H₅)](1) which reacted with HBF₄·Et₂O, via the intermediate [[graphic omitted]Ph₂}(CO)(η⁵-C₅H₅)][BF₄](2), to give [[graphic omitted]Ph₂}(CO)(η⁵-C₅H₅)][BF₄](3). This stable orange salt was reduced with sodium tetrahydroborate to give [[graphic omitted]Ph₂}(CO)(η⁵-C₅H₅)][BF₄](4) and deprotonated with LiMe to give the neutral complex [[graphic omitted]Ph₂}(CO)(η⁵-C₅H₅)](5). Hydrogen-1 and ³¹P-{¹H} n.m.r., and i.r. data are presented and discussed.