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| Content Provider | Springer Nature Link |
|---|---|
| Author | Szorcsik, A. Nagy, L. Gyurcsik, B. Vankó, Gy. Krämer, R. Vértes, A. Yamaguchi, T. Yoshida, K. |
| Copyright Year | 2004 |
| Abstract | A number of dibutyltin(IV) complexes of polyhydroxyalkyl carboxylic acids (O donor atoms) and amino acids (O,N donor atoms) were prepared in the solid state. The binding sites of the ligands were determined by means of FT-IR, Raman and $^{13}$C NMR spectroscopy. Partial quadrupole splitting calculations were utilized to determine the coordination geometry around the Sn(IV) centre by means of Mössbauer measurements. The results showed that in the solid state oligomeric complexes are formed, with the -COO$^{-}$ groups as bridges between the organometallic cations. The {Sn} atoms are mostly in trigonal bipyramidal surroundings. The Sn-O and Sn-C bond distances were determined by EXAFS measurements to be 207-234 and 295 pm, respectively. Evaluation of the pH-metric and NMR titration curves in Me$_{2}$Sn(IV)-D-gluconic acid system revealed that the equilibria in aqueous solution are fairly complicated. In acidic solution, the formation of 1 : 1 and 1 : 2 -COO$^{-}$ coordinated species predominate, but deprotonation of the alcoholic -OH groups also starts at very low pH. In the pH range 5-9, NMR provides experimental evidence of ligand-exchange reactions without pH-metrically detectable proton release. In alkaline solution, further deprotonation processes occur, resulting in either alkoxo or mixed hydroxo complexes. The carboxylate coordination is expected for the amino acid ligands but the shift of the νN-H stretching vibrations in the FT-IR spectra demonstrated that the ammine group also binds to the metal ion in the solid Bu$_{2}$Sn(IV)complexes. |
| Starting Page | 459 |
| Ending Page | 469 |
| Page Count | 11 |
| File Format | |
| ISSN | 02365731 |
| Journal | Journal of Radioanalytical and Nuclear Chemistry |
| Volume Number | 260 |
| Issue Number | 3 |
| e-ISSN | 15882780 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Publisher Date | 2004-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Inorganic Chemistry Physical Chemistry Diagnostic Radiology Nuclear Physics, Heavy Ions, Hadrons Nuclear Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Pollution Health, Toxicology and Mutagenesis Radiology, Nuclear Medicine and Imaging Analytical Chemistry Public Health, Environmental and Occupational Health Nuclear Energy and Engineering |
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