Electronic and Resonance Raman Spectra of [Au2(CS3)2]2-. Spectroscopic Properties of a "Short" Au(I)-Au(I) Bond
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- 作者：Eddie Chung-Chin Cheng ; King-Hung Leung ; Vincent M. Miskowski ; Vivian Wing-Wah Yam ; and David Lee Phillips
- 刊名：Inorganic Chemistry
- 出版年：2000
- 出版时间：August 7, 2000
- 年：2000
- 卷：39
- 期：16
- 页码：3690 - 3695
- 全文大小：82K
- 年卷期：v.39,no.16(August 7, 2000)
- ISSN：1520-510X
文摘
The anion [Au2(CS3)2]2- has an unusually short Au-Au distance (2.80 Å) for a binuclear Au(I) complex. Wereport detailed Raman studies of the nBu4N+ salt of this complex, including FT-Raman of the solid and UV/visresonance Raman of dimethyl sulfoxide solutions. All five totally symmetric vibrations of the anion have beenlocated and assigned. A band at 
= 125 cm-1 is assigned to (Au2). The visible-region electronic absorptionbands (384 (
30 680) and 472 nm ( 610 M-1 cm-1)) are attributable to CS32- localized transitions, as confirmedby the dominance of sym(C-Sexo) ( = 951 cm-1) in RR spectra measured in this region. An absorption bandat 314 nm (22 250 M-1 cm-1) is assigned as the metal-metal 1(d
* 
p) transition, largely because sym(C-Sexo) is not strongly enhanced in RR involving this band. Observation of the expected strong resonance enhancementof (Au2) was precluded as a result of masking by intense solvent Rayleigh scattering in the UV.
= 125 cm-1 is assigned to (Au2). The visible-region electronic absorptionbands (384 ( 30 680) and 472 nm ( 610 M-1 cm-1)) are attributable to CS32- localized transitions, as confirmedby the dominance of sym(C-Sexo) ( = 951 cm-1) in RR spectra measured in this region. An absorption bandat 314 nm (22 250 M-1 cm-1) is assigned as the metal-metal 1(d* p) transition, largely because sym(C-Sexo) is not strongly enhanced in RR involving this band. Observation of the expected strong resonance enhancementof (Au2) was precluded as a result of masking by intense solvent Rayleigh scattering in the UV.