Home Supramolecular isomerism in coordination polymers sustained by hydrogen bonding: bis[Zn(S2CN(Me)CH2CH2OH)2](N,N‘-bis(pyridin-3-ylmethyl)thioxalamide)
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Supramolecular isomerism in coordination polymers sustained by hydrogen bonding: bis[Zn(S2CN(Me)CH2CH2OH)2](N,N‘-bis(pyridin-3-ylmethyl)thioxalamide)

  • Pavel Poplaukhin , Hadi D. Arman and Edward R. T. Tiekink
Published/Copyright: April 13, 2012
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Abstract

Distinct molecular structures and supramolecular association is found in the title crystal structures. When chloroform was diffused into a solution of {Zn[S2CN(Me)CH2CH2OH)]2}2(N,N‘-bis(pyridin-3-ylmethyl)thioxalamide) in acetonitrile, it was found to have co-crystallised (2:1) with S8 (1) as desulphurisation had occurred during crystallisation. By contrast, when dimethylformamide was diffused in an acetonitrile solution of the same compound, a 2:1 dimethylformamide solvate (2) was isolated. The zinc atom coordination geometry is based on a NS4 donor set in each case but, this defines an approximate square pyramidal geometry in (1) and a geometry intermediate between square pyramidal and trigonal bipyramidal in (2). This difference is ascribed to the hydrogen bonding considerations in (2). The hydroxyl groups in (1) self associate leading to a two-dimensional array; the S8 molecules occupy space between successive layers. The aforementioned hydrogen bonding is disrupted in (2) where one hydroxyl group interacts with the solvent dimethylformamide molecule. Accordingly, the supramolecular association between molecules is restricted to a one-dimensional chain.


* Correspondence address: University of Malaya, Department of Chemistry, 50603 Kuala Lumpur, Malaysia,

Published Online: 2012-04-13
Published in Print: 2012-06

© by Oldenbourg Wissenschaftsverlag, Kuala Lumpur, Germany

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