Abstract
Two types of di- n-butyltin(IV) complexes {[ n Bu 2Sn(O 2CR)] 2O} 2 · L 1– 4 and n Bu 2Sn(O 2CR) 2Y 5– 8 (when L=H 2O, R=2-pyrazine 1; L=0, R=2-pyrimidylthiomethylene 2, 1-naphthoxymethylene 3; L=C 6H 6, R=2-naphthoxymethylene 4; when Y=H 2O, R=2-pyrazine 5; Y=0, R=2-pyrimidylthiomethylene 6, 1-naphthoxymethylene 7, 2-naphthoxymethylene 8) have been prepared in 1:1 or 1:2 molar ratios by reactions of di- n-butyltin oxide with the heteroatomic (N, O or S) carboxylic acids. The complexes 1– 8 are characterized by elemental, IR, 1H and 13C NMR spectra. And except for complexes 6 and 7, the complexes 1– 5 and 8 are also characterized by X-ray crystallography diffraction analyses, which reveal that the tin atom of complex 5 is seven-coordinated, while the complexes 1– 4 and 8 are all hexa-coordinated. The nitrogen atom of the aromatic ring in complexes 1 and 5 participates in the interactions with the Sn atom.
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