Synthesis and Spectroscopic and X-ray Structural Characterization of R2SnIV-Oxydiacetate and -Iminodiacetate Complexes
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- 作者：Corrado Di Nicola ; Agustin Galindo ; John V. Hanna ; Fabio Marchetti ; Claudio Pettinari ; Riccardo Pettinari ; Eleonora Rivarola ; Brian W. Skelton ; and Allan H. White
- 刊名：Inorganic Chemistry
- 出版年：2005
- 出版时间：May 2, 2005
- 年：2005
- 卷：44
- 期：9
- 页码：3094 - 3102
- 全文大小：202K
- 年卷期：v.44,no.9(May 2, 2005)
- ISSN：1520-510X
文摘
Seven novel R2SnIV-oxydiacetate (oda) and -iminodiacetate (ida) compounds of the form [R2Sn(oda)(H2O)]2 (R =Me, nBu, and Ph) (1-3), [(R2SnCl)2(oda)(H2O)2]n (R = Et, iBu, and tBu) (4-6), and [Me2Sn(ida)(MeOH)]2 (7) havebeen synthesized and characterized by IR, 1H, 13C, and 119Sn NMR (solution), solid-state 119Sn CPMAS NMR, and119mSn Mössbauer spectroscopy. The crystal structure of [Me2Sn(oda)(H2O)]2, 1, shows it to be dinuclear(centrosymmetric), with two seven-coordinated tin atoms, bridged by one arm of the carboxylate group from eachoda. By contrast, the crystal structure of [(Et2SnCl)2(oda)(H2O)2]n, 4, comprises a zigzag polymeric assembly containinga pair of different alternating subunits, {Et2SnCl(H2O)} and {Et2SnCl(H2O)(oda)}, which are connected by way ofbridging oda carboxylates, thus giving seven-coordinate tin centers in both components. Finally, the structure of[Me2Sn(ida)(MeOH)]2, 7, also centrosymmetric dinuclear, is comprised of a pair of mononuclear units with seven-coordinate tin. The 119Sn solid-state CPMAS NMR and 119mSn Mössbauer suggest the presence of seven-coordinateSn metal atoms in some derivatives and the existence of two different tin sites in the [(R2SnCl)2(oda)(H2O)2]ncompounds.