Hypervalent Organoselenium(II) Compounds with Organophosphorus Ligands. Crystal and Molecular Structure of [2‐(iPr2NCH2)C6H4]Se[S2PR′2] (R′ = Ph,OiPr) |
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Authors: | Elise Duhamel Alpar Pöllnitz Adina Stegarescu Prof Dr Anca Silvestru |
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Institution: | 1. Institut Universitaire de Technologie, Departement de Chimie, Université de Rouen, Rue Lavoisier, 76821 Mont Saint Aignan Cedex, France;2. Facultatea de Chimie si Inginerie Chimica, Universitatea Babes‐Bolyai, 400028 Cluj‐Napoca, Romania |
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Abstract: | Redistribution reactions between diorganodiselenides of type 2‐(R2NCH2)C6H4]2Se2 R = Et, iPr] and bis(diorganophosphinothioyl disulfanes of type R′2P(S)S]2 (R = Ph, OiPr) resulted in the hypervalent 2‐(R2NCH2)C6H4]SeSP(S)R′2 R = Et, R′ = Ph ( 1 ), OiPr ( 2 ); R = iPr, R′ = Ph ( 3 ), OiPr ( 4 )] species. All new compounds were characterized by solution multinuclear NMR spectroscopy (1H, 13C, 31P, 77Se) and the solid compounds 1 , 3 , and 4 also by FT‐IR spectroscopy. The crystal and molecular structures of 3 and 4 were determined by single‐crystal X‐ray diffraction. In both compounds the N(1) atom is intramolecularly coordinated to the selenium atom, resulting in T‐shaped coordination arrangements of type (C,N)SeS. The dithio organophosphorus ligands act monodentate in both complexes, which can be described as essentially monomeric species. Weak intermolecular S ··· H contacts could be considered in the crystal of 3 , thus resulting in polymeric zig‐zag chains of R and S isomers, respectively. |
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Keywords: | Organoselenium compounds Organophosphorus ligands NMR spectroscopy X‐ray diffraction |
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