MO LCAO calculation of the barrier to rotation around the C=C bond inα -nitro-β-methylaminoacrylic ester and its anion

Conclusions According to the data from MO LCAO calculations, the barrier to rotation about the C=C bond decreases by a factor of three upon passing from the-isomer of a-nitro--methylaminoacrylic ester to its anion on account of the reduction in the order of the double bond.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 123–126, January, 1982.