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  • 1 Szeged University Biocoordination Research Group of Hungarian Academy of Sciences, Department of Inorganic and Analytical Chemistry H-6701 Szeged Hungary
  • 2 Szeged University Department of Inorganic and Analytical Chemistry H-6701 Szeged Hungary
  • 3 University of Palero Department of Inorganic Chemistry Palermo Italy
  • 4 Otto-von-Guericke University Department of Chemistry Universitätplatz 2, Geb M D-39106 Magdeburg Germany
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Abstract  

A number of complexes of ligands containing {O,N,S} donor atoms (2,3,4,6-tetra-O-acetyl-b-D-thioglucopyranoside, 1-thio-b-D-glucose, 2-aminomercaptopurine, 4-amino-2-mercaptopyrimidine and 2-amino-6-mercaptopurine-9-D-riboside) with di-n-butyltin(IV) oxide, diphenyltin(IV) oxide, tribenzyltin(IV) chloride, and trimethyltin(IV) chloride were prepared in the solid state. It was found that the complexes contain the organotin(IV) moiety and the ligand in a ratio of 1:1 or 2:1. The FTIR and Raman spectra clearly demonstrated that the organotin(IV) moieties react with the {S} atom of the ligands, while di-n-butyltin(IV) oxide is coordinated to the deprotonated hydroxy group. In several cases, the basic part of the ligands also participates in complex formation. Comparison of the experimental Mössbauer D values with those calculated on the basis of the pqs concept revealed that the organotin(IV) moiety has trigonal-bipyramidal geometry, and in certain cases tetrahedral geometry too. Some of the complexes contain the organotin(IV) cation in two different surroundings.