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Issue 20, 2003
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Zinc dicarboxylate polymers and dimers: thiourea substitution as a tool in supramolecular synthesis

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Abstract

The reactions of the zinc thiourea complexes [Zn{SC(NHR)(NHR′)}4]Cl2 (L = L1, R = H, R′ = Me; L = L2, R = Me, R′ = Me) with a range of dicarboxylates have been investigated. From these reactions eleven products – [Zn(L1)2(μ-terephthalate)]n, [Zn(L1)2(μ-fumarate)]n, {[Zn(L1)2(μ-isophthalate)]·H2O}n, [Zn(L1)2(μ-1,3-phenylenediacetate)]n, [Zn(L1)2(μ-phthalate)]2·4H2O, {[Zn(L2)2(μ-terephthlate)]·0.5H2O}n, [Zn(L2)2(μ-fumarate)]n, [Zn(L2)2(μ-isophthalate)]2·2H2O, [Zn(L2)2(μ-phthalate)]n, [Zn(L2)2(μ-maleate)]2·2H2O and [Zn(L2)2(μ-citraconate)]2·2H2O – have been crystallographically characterised. The structural characterisation of these compounds demonstrates that by increasing the number of methyl substituents on the thiourea ligand, the likelihood of forming a dimer as opposed to a coordination polymer also increases. Moreover, dimer formation is only favoured for non-linear dicarboxylates – those in which the angle between the carboxylate groups is less than 180°.

Graphical abstract: Zinc dicarboxylate polymers and dimers: thiourea substitution as a tool in supramolecular synthesis

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Publication details

The article was received on 30 Jun 2003, accepted on 27 Aug 2003 and first published on 17 Sep 2003


Article type: Paper
DOI: 10.1039/B307420J
Citation: Dalton Trans., 2003, 3840-3849
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    Zinc dicarboxylate polymers and dimers: thiourea substitution as a tool in supramolecular synthesis

    N. J. Burke, A. D. Burrows, A. S. Donovan, R. W. Harrington, M. F. Mahon and C. E. Price, Dalton Trans., 2003, 3840
    DOI: 10.1039/B307420J

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