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Issue 41, 2011
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Synthesis and structure of cationic guanidinate-bridged bimetallic {Li7M} cubes (M = Mn, Co, Zn) with inverse crown counter anions

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Abstract

The reactions of the heteroleptic lithium amide [Li3(μ-hmds)2(μ,μ-hpp)] (1), where [hmds] = hexamethyldisilazide and [hpp] = hexahydropyrimidopyrimidide, with MnCl2, CoCl2 or ZnBr2 result in the formation of the separated ion-pairs [MLi78-O)(μ,μ-hpp)6]+[A], which each consist of a {MLi7} oxo-centred cube structural motif (M = Mn 2, Co 4, Zn 5), with each face of the cube being bridged by an [hpp] ligand. In the case of M = Mn and Co, the counter ion, [A], is the pentagonal anionic inverse crown [{Li(μ-hmds)}55-Cl)] (3), whereas the reaction with M = Zn produces the known tris-amido zincate [Zn(hmds)3] counter anion.

Graphical abstract: Synthesis and structure of cationic guanidinate-bridged bimetallic {Li7M} cubes (M = Mn, Co, Zn) with inverse crown counter anions

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Article information


Submitted
27 May 2011
Accepted
27 Jul 2011
First published
02 Sep 2011

Dalton Trans., 2011,40, 10918-10923
Article type
Paper

Synthesis and structure of cationic guanidinate-bridged bimetallic {Li7M} cubes (M = Mn, Co, Zn) with inverse crown counter anions

D. Woodruff, M. Bodensteiner, D. O. Sells, Richard. E. P. Winpenny and R. A. Layfield, Dalton Trans., 2011, 40, 10918
DOI: 10.1039/C1DT10999E

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