Vibrational frequencies of (CH3)3GeCCH and (CD3)3GeCCD and force field of trimethylgermylacetylene
1985
Abstract The polarized Raman (50–3400 cm −1 ) spectra of (CH 3 ) 3 GeCCH and (CD 3 ) 3 GeCCD 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 C 3ν . 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.
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