Transformations of alkynyl ligands at iron centres: alkenyl formation via addition of PPh3 and enyne generation via head-to-head coupling and addition of benzene

Abstract

Thermolysis of Fe₂(CO)₆(µ-PPh₂)(µ-C₂Bu^t) affords the binuclear alkenyl complex Fe₂(CO)₅(µ-PPh₂)(µ-o-Ph₂PC₆H₄CCHBu^t) and the trinuclear arene complex Fe₃(CO)₄(µ₃-o-PhPC₆H₄PPh){µ₃-C(Bu^t)CCHCBu^t-η⁶-C₆H₅} both resulting from a number of novel transformations including C–C bond formation and C–H and C–P bond cleavage and reformation.