Issue 32, 2020

Magnesium hydrides bearing sterically demanding amidinate ligands: synthesis, reactivity and catalytic application

Abstract

The synthesis and characterisation of a series of magnesium complexes bearing sterically demanding amidinate ligands is reported; this includes magneisum amides (1a and 1b), hydrides (3a and 3b) and alkyl complexes (2b). The solid and solution state behaviour of the complexes has been investigated using single crystal X-ray diffraction and NMR spectroscopy, revealing the magnesium hydrides to exist as dimers in the solid state, dispite the sterically demanding ligand systems and showing a degree of monomeric character in solution. The stoichiometric and catalytic activity of the amidinate complexes were investigated, with the complexes found to efficiently mediate both the hydroamination of N,N′-diisopropylcarbodiimide and the Tishchenko reaction. The metal hydrides are highly reactive towards coordinating substrates, showing a significant increase in catalytic rate compared with more ubiquitous β-diketiminate magnesium hydrides.

Graphical abstract: Magnesium hydrides bearing sterically demanding amidinate ligands: synthesis, reactivity and catalytic application

Supplementary files

Article information

Article type
Paper
Submitted
17 Jul 2020
Accepted
03 Aug 2020
First published
04 Aug 2020
This article is Open Access
Creative Commons BY license

Dalton Trans., 2020,49, 11354-11360

Magnesium hydrides bearing sterically demanding amidinate ligands: synthesis, reactivity and catalytic application

C. Bakewell, Dalton Trans., 2020, 49, 11354 DOI: 10.1039/D0DT02523B

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