New diazenido-complexes of molybdenum(IV), tungsten(IV), and rhenium(III)

Abstract

The reaction of [MCl₄(Ph₂PCH₂CH₂PPh₂)] with phenylhydrazine produces the complexes [MCl₃(N₂Ph)(Ph₂PCH₂CH₂PPh₂)](M = Mo or W). Similar derivatives containing Et₂PCH₂CH₂PEt₂ and PMe₂Ph have also been isolated. The structures have been assigned by n.m.r. spectroscopy. An improved synthesis of [ReCl₂(N₂Ph)(NH₃)(PMe₂Ph)₂] is reported. The diazenido-ligand can be quaternised with methyl iodide.