Amidinate–carboxylate complexes of dimolybdenum and ditungsten: M2(O2CR)2((NiPr)2CR′)2. Preparations, molecular and electronic structures and reactions†‡§
Abstract
The compounds M2(O2CMe)4 and the lithium amidinates Li[(NiPr)2CR] react to give the new compounds trans-M2(O2CMe)2[(NiPr)2CR]2 where M = Mo or W and R = Me (M = Mo only), –CCtBu, –C
CPh and –C
C–Fc where Fc = 1-ferrocenyl. The limitations of this type of reaction are described based on steric considerations together with the preparation and characterization of the compound Mo2(µ-O2C-9-anthracene)2[η2-(NiPr)2CMe]2. The electronic structures of the bis-amidinate–bis-carboxylate M2 complexes are described based on model compounds employing density functional theory and are correlated with the experimental observations of their physicochemical properties and in particular their observed
C–Ph. The kinetic lability of these new M2-containing compounds toward
- This article is part of the themed collection: Collection of articles dedicated to Professor Ken Wade, F.R.S. in celebration of his seventy-fifth birthday