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, –CCPh and –CC–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
- 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