Enhanced Anion Binding from Unusual Coordination Modes of Bis(thiourea) Ligands in Platinum Group Metal Complexes
✍ Scribed by Dr. M. Laura Soriano; Dr. Joseph T. Lenthall; Dr. Kirsty M. Anderson; Dr. Stephen J. Smith; Prof. Jonathan W. Steed
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 827 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0947-6539
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✦ Synopsis
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(η^6^‐p‐cymene)(κ__S__,S′,N‐L^3^−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(η^6^‐p‐cymeme)(κ__S__,S′,N~py~‐L^4^)]^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.