Galding, M. R. and Virovets, A. V. and Kazakov, I. V. and Scheer, M. and Smirnov, S. N. and Timoshkin, A. Y. (2016) Diminished electron density in the Vaska-type rhodium(I) complex trans-[Rh(NCBH3)(CO)(PPh3)(2)]. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY, 72. 514-+. ISSN 2053-2296,
Full text not available from this repository. (Request a copy)Abstract
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 Rh I 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-kappa N)bis(triphenylphosphine-kappa P)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, H-1, C-13 and B-11 NMR spectroscopy. The X-ray diffraction data indicate that the cyanotrihydridoborate ligand coordinates to the Rh I 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 v(CO) and the carbonyl carbon (1)J(C-Rh) and (1)J(C-P) coupling constants of the C-ipso atoms of the triphenylphosphine groups reflect the diminished electron density on the central Rh I atom compared to the parent trans-[RhCl(CO)(PPh3)(2)] complex.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MOLECULAR-STRUCTURE; CRYSTAL; FORM; TRANS-CARBONYLCHLOROBIS(TRIPHENYLPHOSPHINE)RHODIUM(I); rhodium(I) complex; cyanotrihydridoborate ligand; crystal structure; Vaska-type complex; diminished electron density; NMR analysis; IR analysis |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Apr 2019 05:23 |
| Last Modified: | 03 Apr 2019 05:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3666 |
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