Infrared intensities of cis- and trans-1,2-disubstituted ethylenes indicate that interactions between substituents are qualitatively similar to but quantitatively 1.5 times those in the corresponding para-disubstituted benzenes. Successful calculations of the dipole transition moments from CNDO/2 molecular orbital theory are presented.
G. P. Ford, A. R. Katritzky and R. D. Topsom, J. Chem. Soc., Perkin Trans. 2, 1975, 1371 DOI: 10.1039/P29750001371
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