Tin Tetrachloride Adducts with Arylphosphoramidates: A Multinuclear (31P, 19F,and 119Sn) NMR Characterization in Solution |
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| Authors: | Thouraya Barhoumi-Slimi M A K Sanhoury M T Ben Dhia M R Khaddar |
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| Institution: | 1. Laboratory of Structural Organic Chemistry: Synthesis and Physicochemical Studies, Coordination Chemistry Group, Department of Chemistry, Faculty of Sciences of Tunis , University of Tunis El Manar , Tunis , Tunisia;2. Higher Institute of Sciences and Technology of Environment, Technopole of Borj Cedria , University of Carthage , Tunis , Tunisia;3. Laboratory of Structural Organic Chemistry: Synthesis and Physicochemical Studies, Coordination Chemistry Group, Department of Chemistry, Faculty of Sciences of Tunis , University of Tunis El Manar , Tunis , Tunisia |
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| Abstract: | Abstract The synthesis of octahedral complexes SnCl4L2] (L = R2NP(O)(OCH2CF3)(O-p-tolyl): R2N = Me2N (1), Et2N (2), CH2(CH2CH2)2N (3), and O(CH2CH2)2N (4), or L = R2NP(O)(OCH2CF3)(O-p-PhNO2): R2N = Me2N (5), Et2N (6), and O(CH2CH2)2N (7) is described. The new adducts have been characterized by multinuclear (31P, 19F, 119Sn) NMR, IR spectroscopy, and elemental analyses. The solution NMR data show the presence of a mixture of cis and trans isomers. The structure of the complexes in solution was further confirmed by 119Sn NMR spectra, which display a triplet for each isomer, indicating an octahedrally coordinated tin center. The effects of the nature of R and Ar substituents on the donor ability of the P=O group in the ligands R2NP(O)(OCH2CF3)(OAr) were investigated on the basis of 119Sn NMR chemical shifts and used to classify these ligands according to their Lewis basicity. |
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| Keywords: | Arylphosphoramidates tin tetrachloride NMR spectroscopy cis/trans isomers |
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