Enhanced Anion Binding from Unusual Coordination Modes of Bis(thiourea) Ligands in Platinum Group Metal Complexes |
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| Authors: | Dr. M. Laura Soriano Dr. Joseph T. Lenthall Dr. Kirsty M. Anderson Dr. Stephen J. Smith Prof. Jonathan W. Steed |
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| Affiliation: | 1. Department of Chemistry, Durham University, South Road, Durham, DH1 3LE (UK), Fax: (+44)?191‐384‐4737;2. BP Chemicals Ltd., Hull Research and Technology Centre, Saltend, Hull, HU12 8D (UK) |
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| Abstract: | Treatment of a range of bis(thiourea) ligands with inert organometallic transition‐metal ions gives a number of novel complexes that exhibit unusual ligand binding modes and significantly enhanced anion binding ability. The ruthenium(II) complex [Ru(η6‐p‐cymene)(κS,S′,N‐ L3 ?H)]+ ( 2 b ) possesses juxtaposed four‐ and seven‐membered chelate rings and binds anions as both 1:1 and 2:1 host guest complexes. The pyridyl bis(thiourea) complex [Ru(η6‐p‐cymeme)(κS,S′,Npy‐ L4 )]2+ ( 4 ) binds anions in both 1:1 and 1:2 species, whereas the free ligand is ineffective because of intramolecular NH???N hydrogen bonding. Novel palladium(II) complexes with nine‐ and ten‐membered chelate rings are also reported. |
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| Keywords: | anion binding chelates supramolecular chemistry transition metals thiourea |
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