Interactions intramoleculaires—XXXI. Etude vibrationnelle des conformères de chloro-4 et de cyano-4 cyclohexénes alkylés en 3

Add time:07/22/2019    Source:sciencedirect.com

Infrared and Raman spectra in the liquid state of 3-R, 4-X cyclohexenes (R = CH3, (CH3)3C; X = CN,Cl) and their d1-(4) and d3-(3,6,6) isotopic modifications, Raman spectra of some low temperature crystallised compounds, vibrational spectra in the solid state of cis and trans 1-acetoxy 3-t-butyl 4-cyano cyclohexenes, were studied.The frequencies of cyclohexenic skeleton modes below 900 cm−1 and the frequencies of deformation modes involving the CCN bond or stretching νCCl vibration of the different conformers were assigned. In the cis and trans 1-acetoxy 3-R 4-cyano cyclohexenes (respectively in the e′a and e′e conformations), the positions of the 627 cm−1 δax and the 538 cm−1 δeq deformation vibrations agree with the assignments proposed for the other cyano derivatives.

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