A series of neutral alkaline earth metal hydride complexes supported by a bulky, unsymmetrical β-diketiminate ligand, [{(Dip/TCHPNacnac)M(μ-H)}2] (M = Mg, Ca, Sr or Ba)

Dominic B Kennedy; Matthew J Evans; Dafydd D L Jones; Joseph M Parr; Michael S Hill; Cameron Jones

doi:10.1039/d4cc04286g

A series of neutral alkaline earth metal hydride complexes supported by a bulky, unsymmetrical β-diketiminate ligand, [{(^Dip/TCHPNacnac)M(μ-H)}₂] (M = Mg, Ca, Sr or Ba)

Chem Commun (Camb). 2024 Sep 26;60(78):10894-10897. doi: 10.1039/d4cc04286g.

Authors

Dominic B Kennedy^{1

2}, Matthew J Evans¹, Dafydd D L Jones¹, Joseph M Parr¹, Michael S Hill², Cameron Jones¹

Affiliations

¹ School of Chemistry, Monash University, PO Box 23, Melbourne, VIC, 3800, Australia. cameron.jones@monash.edu.
² Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK. msh27@bath.ac.uk.

PMID: 39253901
DOI: 10.1039/d4cc04286g

Abstract

A bulky, unsymmetrical β-diketiminate ligand, [HC{MeCN(Dip)}{MeCN(TCHP)}]^- (^Dip/TCHPNacnac; Dip = 2,6-diisopropylphenyl, TCHP = 2,4,6-tricyclohexylphenyl), has been utilised in the preparation of a series of magnesium alkyl and calcium, strontium and barium amide complexes. Reaction of these with PhSiH₃ afforded the first complete series of β-diketiminato heavier group 2 metal hydride complexes, [{(^Dip/TCHPNacnac)M(μ-H)}₂] (M = Mg, Ca, Sr or Ba). The unsymmetrical nature of the β-diketiminate ligand seemingly promotes stabilising interactions of ligand Dip groups with the metal centres in the Ca, Sr and Ba hydride complexes.