Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1250722 | Vibrational Spectroscopy | 2009 | 6 Pages |
Abstract
The far-infrared and Raman spectra of binuclear molecules [Me2AuX]2 (X = Cl, Br, I) and [Me2Au(OOCR)]2 (R = Me, CF3, But, Ph) in the 600-70 cmâ1 region are reported. The experimentally measured vibrational frequencies of [Me2AuX]2 are in a good agreement with density functional theory predictions. The Auâ¦Au vibrational interactions predicted to be in the 270-60 cmâ1 region of [Me2AuX]2 far-IR and Raman spectra have been observed. The Raman-active Auâ¦Au vibrations of the [Me2Au(OOCR)]2 molecules were found to be in the same region as those of [Me2AuX]2. The Au-X stretching modes were observed between 100 and 250 cmâ1 in accordance with the DFT predictions. Their frequencies in the IR spectra of [Me2AuX]2 increase in the sequence I < Br < Cl while the AuC2 stretching frequencies decrease in the same order. This fact might be an evidence of the decreasing covalent character of the gold-halogen bridges. The Au-O stretching bands of dimethylgold(III) carboxylates have been observed in the 500-250 cmâ1 region, and Au-C stretching frequencies of both [Me2AuX]2 and [Me2Au(OOCR)]2 compounds have been found between 600 and 500 cmâ1.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Aleksandr A. Bessonov, Tamara V. Basova, Vitaly G. Kiselev, Lilia A. Sheludyakova, Natalia B. Morozova, Igor K. Igumenov,