Adducts of Rh2[MTPA]4 with some phosphine chalcogenides: nature of binding and ligand exchange |
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| Authors: | Gáti Tamás Simon András Tóth Gábor Magiera Damian Moeller Stefan Duddeck Helmut |
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| Institution: | Institute for General and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary. |
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| Abstract: | Adducts of four phosphine chalcogenides with the chiral dirhodium complex (Rh-Rh]) were investigated by variable-temperature 1H and 31P NMR spectroscopy in order to compare their properties as axial ligands. Whereas the selenide (1) and the sulfide (2) are strong ligands with electrostatic attraction and, in addition, a significant orbital (HOMO-LUMO) interaction, the phosphine oxide compounds (P=O) bind primarily via electrostatic attraction and are relatively weak donors. Moreover, the overall bond strength in these adducts depends on steric congestion around the P=O group. |
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| Keywords: | adduct formation NMR variable‐temperature NMR 1H NMR 31P NMR 77Se NMR dirhodium complexes phosphine chalcogenides |
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