Synthesis and solid-state structural characterisation of Pt(II,IV) bromide complexes containing bidentate organothiomethylpyridine heteroleptic ligands |
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Authors: | Roderick C Jones Brian W Skelton Vicki-Anne Tolhurst Allan H White Adele J Wilson Allan J Canty |
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Institution: | 1. School of Chemistry, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia;2. Chemistry M313, University of Western Australia, Crawley, WA 6009, Australia |
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Abstract: | A convenient synthetic method for the preparation of organothiomethylpyridine ligands 2-(RSCH2)C5H4N (R = Ph (L1), Me (L2)), 2-MeS–6-Me-C5H3N (L3), and 2-MeS–4-Me-C5H3N (L4) via the initial lithiation of substituted 2-picolines followed by the nucleophilic reaction with a diorganyldisulfide is described. The complexes PtBr2L] (L = L1–L4) have been prepared in good to high yields as yellow solids with low solubility in organic solvents. The solid state structures of the complexes have been determined, showing the spatial arrangement of the complexes to depend significantly upon varying substituents within the ligand. The complexes undergo oxidation by bromine to form the tetravalent complexes PtBr4(L)] (L = L1–L4). The solid state structures of PtBr4(L2)] and PtBr4(L4)] have been determined, and shown to be monomeric with the ligand chelating the platinum centre. |
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Keywords: | Platinum Mixed donor ligands Pyridine Thioether X-ray crystal structures |
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