Vibrational frequencies of (CH3)3GeCCH and (CD3)3GeCCD and force field of trimethylgermylacetylene

The polarized Raman (50–3400 cm−1) spectra of (CH3)3GeCCH and (CD3)3GeCCD in the liquid phase and the i.r. (32–4000 cm−1) spectra of these compounds in the liquid and gas phases were obtained. All the active fundamentals except an internal torsion were assigned based on a molecular model of point...

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Bibliographic Details
Published in:Spectrochimica acta. Part A: Molecular spectroscopy 1985, Vol.41 (11), p.1269-1276
Main Authors: Belyakov, A.V., Bogoradovskii, E.T., Zavgorodnii, V.S., Nikitin, V.S., Polyakova, M.V., Baburina, I.I.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Molecular properties and interactions with photons
Molecular spectra
Physics
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Summary:The polarized Raman (50–3400 cm−1) spectra of (CH3)3GeCCH and (CD3)3GeCCD in the liquid phase and the i.r. (32–4000 cm−1) spectra of these compounds in the liquid and gas phases were obtained. All the active fundamentals except an internal torsion were assigned based on a molecular model of point group C3ν. Each methyl group is expected to exist in a staggered arrangement with respect to the GeC bond and the neighbouring GeC bonds. General valence force constants of trimethylgermylacetylene were calculated by the least squares method. The calculated and observed frequencies agree to better than 6 cm−1 or 0.5 % for both the light and heavy compounds. The results are compared to corresponding quantities in some similar molecules.
ISSN:0584-8539
DOI:10.1016/0584-8539(85)80234-8