ChemInform Abstract: Reaction of a Terminal Phosphinidene Complex with a Carbene Complex. Synthesis of a Phosphorus‐Carbon Double Bond Through Phosphinidene‐Carbene Coupling.

Abstract The reaction of equimolar amounts of the carbene complex (II) with transient (phenylphosphinidene)pentacarbonyltungsten, derived from (I), gives the phosphaalkene complex (III) which spontaneously dimerizes to form the corresponding 1,2‐diphosphetane complex (IV) as a mixture of the E and Z isomer.