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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 188, 2013 - Issue 12
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Original Articles

Tin Tetrachloride Adducts with Arylphosphoramidates: A Multinuclear (31P, 19F, and 119Sn) NMR Characterization in Solution

Thouraya Barhoumi-Slimi 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; Higher Institute of Sciences and Technology of Environment, Technopole of Borj Cedria, University of Carthage, Tunis, Tunisia
,
M. A. K. Sanhoury 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
,
M. T. Ben Dhia 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
&
M. R. Khaddar 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
Pages 1827-1834 | Received 20 Jan 2013, Accepted 10 Mar 2013, Published online: 03 Oct 2013
 
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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.

GRAPHICAL ABSTRACT

Acknowledgments

We are grateful to the Tunisian Ministry of High Education and Scientific Research for financial support (LR99ES14) of this research.

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