| Autor: |
Galding, M. R., Virovets, A. V., Kazakov, I. V., Scheer, M., Smirnov, S. N., Timoshkin, A. Y. |
| Předmět: |
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| Zdroj: |
Acta Crystallographica Section C: Structural Chemistry; Jul2016, Vol. 72 Issue 7, p514-517, 11p |
| Abstrakt: |
Vaska-type complexes, i.e. trans-[RhX(CO)(PPh3)2] (X is a halogen or pseudohalogen), undergo a range of reactions and exhibit considerable catalytic activity. The electron density on the RhI atom in these complexes plays an important role in their reactivity. Many cyanotrihydridoborate (BH3CN-) complexes of Group 6-8 transition metals have been synthesized and structurally characterized, an exception being the rhodium(I) complex. Carbonyl(cyanotrihydridoborato-κN)bis(triphenylphosphine-κP)rhodium(I), [Rh(NCBH3)(CO)-(C18H15P)2], was prepared by the metathesis reaction of sodium cyanotrihydridoborate with trans-[RhCl(CO)(PPh3)2], and was characterized by singlecrystal X-ray diffraction analysis and IR, 1H, 13C and 11B NMR spectroscopy. The X-ray diffraction data indicate that the cyanotrihydridoborate ligand coordinates to the RhI atom through the N atom in a trans position with respect to the carbonyl ligand; this was also confirmed by the IR and NMR data. The carbonyl stretching frequency υ(CO) and the carbonyl carbon 1JC-Rh and 1JC-P coupling constants of the Cipso atoms of the triphenylphosphine groups reflect the diminished electron density on the central RhI atom compared to the parent trans-[RhCl(CO)(PPh3)2] complex. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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