The first bis(imido) transition metal Schiff-base complexes

Abstract

The first bis(imido) transition metal Schiff-base complexes [(Bu^tN)₂WL], where L = salen 1, (3,5-Bu^t₂)₂salen 2 or (4-MeO)₂ salen 3 [salen = dianion of N,N′-bis(salicylidene)ethane-1,2-diamine, (3,5-Bu^t₂)₂salen = dianion of N,N′-bis(3,5-di-tert-butylsalicylidene)ethane-1,2-diamine and (4-MeO)₂salen = dianion of N,N′-bis(4-methoxysalicylidene)ethane-1,2-diamine] were synthesised by alcoholysis of [W(NBu^t)₂(NHBu^t)₂] using the diprotonated Schiff-bases, LH₂, and characterised by ¹H and ¹³C-{¹H} NMR for 1–3, and mass spectrometry, elemental analysis, cyclic voltammetry and X-ray crystallography for 2.