Vibrational study of hydrotris(pyrazolyl)borato complexes of rhenium(I) tricarbonyl

The Fourier transform infrared and Raman spectra of the complexes hydrotris(pyrazolyl)borato rhenium tricarbonyl [TpRe(CO) 3] and hydrotris(3,5-dimethylpyrazolyl)borato rhenium tricarbonyl [Tp ∗Re(CO) 3] and their ligand salts NaTp and KTp ∗ have been recorded. From the vibrational assignment the be...

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Bibliographic Details
Published in:Vibrational spectroscopy 1995-09, Vol.9 (3), p.257-264
Main Authors: Guillermo Díaz, F., Marcelo Campos, V., Hugo Klahn O., A.
Format: Article
Language:English
Subjects:
Hydrotris(pyrazolyl)borato-rhenium-carbonyl complexes
Infrared spectrometry
Normal coordinate analysis
Raman spectrometry
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Summary:The Fourier transform infrared and Raman spectra of the complexes hydrotris(pyrazolyl)borato rhenium tricarbonyl [TpRe(CO) 3] and hydrotris(3,5-dimethylpyrazolyl)borato rhenium tricarbonyl [Tp ∗Re(CO) 3] and their ligand salts NaTp and KTp ∗ have been recorded. From the vibrational assignment the better donor ability of the hydrotris(pyrazolyl)borato in comparison with the cyclopentadlenyl ligand coordinated to the Re(CO) 3 fragment was deduced. The vibrational assignment was completed with a normal coordinate analysis based on a simplified model. The frequencies of ν(Re-N) and ν(B-N) were located at about 370 and 770 cm −1, respectively. The corresponding force constants were proposed equal to 1.25 and 3.9 mdyn Å −1.
ISSN:0924-2031
1873-3697
DOI:10.1016/0924-2031(95)00017-O