Conclusions
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1.
The geometrical parameters and conformation were found for the methyl ester of transll-dimethylamino-2-carbomethoxyundecapentaenecarboxylic acid.
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2.
The energy characteristics found by the CNDO/2 LCAO MO method for (I)–(VI), for which crystal structures have been determined by x-ray diffraction analysis, indicate several general features for the effect of electron-donor and electron-withdrawing (acceptor) substituents on a pπ system.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2269–2274, October, 1983.
The authors thank Zh. A. Krasnaya for providing the sample studied and V. G. Kiselev for assistance in the experimental dipole moment determinations.
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Dekaprilevich, M.O., Vorontsova, L.G. & Chizhov, O.S. Molecular structure of the methyl ester of trans-11-dimethylamino-2-carbomethoxyundecapentaenecarboxylic acid. Russ Chem Bull 32, 2048–2052 (1983). https://doi.org/10.1007/BF00955769
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DOI: https://doi.org/10.1007/BF00955769