Campbell Cookson Hocking and Hughes 389. Synthesis and Chemistry of Phospholes By I. G. M. CAMPBELL,R. C. COOKSON,M. B. HOCKING and A. N. HUGHES The preparation and properties of some phospholes (phosphacylopenta- dienes) are described. The product of the reaction of 1,2,5-triphenylphos-phole with diazomethane is