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

Deacon, Glen B., Junk, Peter C., and Moxey, Graeme J. (2010) Synthesis and structural characterisation of the heavier alkaline earth 2,6-di-iso-propylphenolate complexes. New Journal of Chemistry, 34 (8). pp. 1731-1736.

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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)]center dot[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.

Item ID: 29679
Item Type: Article (Research - C1)
ISSN: 1369-9261
Keywords: pi-arene interactions; x-ray-structure; styrene polymerization; rare-earth; organometallic chemistry; coordination-number; crystal-structures; calcium; barium; precursors
Funders: Australian Research Council (ARC)
Projects and Grants: Australian Research Council (ARC) DP0984775
Date Deposited: 02 Oct 2013 10:34
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030204 Main Group Metal Chemistry @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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