Electron spin resonance and electrochemical studies of monocyclopentadienyl-titanium(III) and -zirconium(III) derivatives [M(η5-C5H5)R2] involving chelated phosphinomethyl (R = CH2PPh2) and phosphinoacetate (R = O2CCH2PPh2) ligands

Abstract

E.s.r. and electrochemical techniques demonstrate that the –CH₂PPh₂ group bonded to Ti^III and Zr^III gives a three-membered ring and a five-membered ring is obtained when –O₂CCH₂PPh₂ is bonded to Zr^III; opening of the ring is achieved by co-ordination of the phosphorus atom to another metal (Mo) yielding a heterobimetallic complex.