Functionalised N-pyrrolyl phosphines: synthesis and molybdenum chemistry of a new ketophosphine

Abstract

The synthesis and X-ray crystal structure of the new keto-functionalised N-pyrrolyl phosphine ligand PPh₂NC₄H₃{C(O)CH₃}-2 L is reported. The ligand coordinates to molybdenum(II) as either a uni- or a bi-dentate ligand, and the reversibility of the ketone coordination is demonstrated by the interconversion of the complexes [MoCl(CO)₂(L-κ¹P)(η⁵-C₅H₅)] 1 and [Mo(L-κ²P,O)(CO)₂(η⁵-C₅H₅)][BF₄]  2 on abstraction or addition of chloride. The X-ray crystal structure of 1 is also reported.