Abstract

AbstractThe reaction between the ligands 4‐(trifluoromethyl)pyrimidine‐2‐thione (4‐CF3pymSH) and 6‐methyl‐4‐(trifluoromethyl)pyrimidine‐2‐thione (6‐Me‐4‐CF3pymSH) and the corresponding diorganotin(IV) dichloride [R2SnCl2] (R = Me, tBu or Ph) or diphenyllead(IV) dichloride in the presence of triethylamine yields the diorganotin(IV) complexes [R2Sn(4‐CF3pymS)2] and [R2Sn(6‐Me‐4‐CF3pymS)2] or diorganolead(IV) complexes [Ph2Pb(4‐CF3pymS)2] and [Ph2Pb(6‐Me‐4‐CF3pymS)2], respectively. The compounds have been characterised by microanalysis, mass spectrometry and by IR and Mössbauer spectroscopy and, in the case of the compound that was sufficiently soluble, by 1H, 13C, 119Sn and 207Pb NMR spectroscopy. The compounds [Me2Sn(4‐CF3pymS)2] (1), [Ph2Sn(4‐CF3pymS)2] (2), [Ph2Sn(6‐Me‐4‐CF3pymS)2] (5), [tBu2Sn(6‐Me‐4‐CF3pymS)2] (6), [Ph2Pb(4‐CF3pymS)2] (7) and [Ph2Pb(6‐Me‐4‐CF3pymS)2] (8) have also been characterised by X‐ray diffraction. The X‐ray crystal structures show that the metal centre in all these complexes is in a distorted octahedral environment with bonds to two carbon atoms from the aryl or alkyl substituents and to sulfur and heterocyclic nitrogen atoms from the pyrimidine derivative, which acts a (κ2‐N,S) chelating ligand. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

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