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Issue 8, 2010

Synthesis and structural characterisation of the heavier alkaline earth 2,6-di-iso-propylphenolate complexes

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Abstract

Redox transmetallation ligand exchange reactions involving a heavy alkaline earth metal, bis(pentafluorophenyl)mercury and 2,6-di-iso-propylphenol (HOdipp) in dme (1,2-dimethoxyethane) afforded alkaline earth aryloxo complexes which were structurally characterised. All complexes obtained were mononuclear, but the ionic radius of the alkaline earth metal was found to influence the number, and binding mode, of ligated dme molecules. Using Ca metal in the reaction afforded [Ca(Odipp)2(dme)2] 1 containing a six coordinate Ca metal atom and the phenolate ligands oriented in a cisoidal arrangement. Using Sr metal in the reaction yielded {3[Sr(Odipp)2(dme)2]·[Sr(Odipp)2(dme)3]} 2 containing both six and seven coordinate Sr metal atoms. The six coordinate species [Sr(Odipp)2(dme)2] contains phenolate ligands positioned in a cisoidal geometry. The seven coordinate species [Sr(Odipp)2(dme)3] contains a unidentate dme ligand, a rare binding mode for dme in alkaline earth chemistry. Using Ba metal in the reaction afforded [Ba(Odipp)2(dme)3] 3, which contains an eight coordinate Ba metal atom.

Graphical abstract: Synthesis and structural characterisation of the heavier alkaline earth 2,6-di-iso-propylphenolate complexes

Supplementary files

Article information


Submitted
24 Mar 2010
Accepted
17 May 2010
First published
10 Jun 2010

New J. Chem., 2010,34, 1731-1736
Article type
Paper

Synthesis and structural characterisation of the heavier alkaline earth 2,6-di-iso-propylphenolate complexes

G. B. Deacon, P. C. Junk and G. J. Moxey, New J. Chem., 2010, 34, 1731 DOI: 10.1039/C0NJ00225A

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