Electrical and optical properties of the nitramine group and molecular structure of some N-nitramines

The electrical and optical properties (dipole moment, electrooptical and op tical Kerr constants, molecular polarizability anisotropy, polarizability t ensor, molecular refraction) of N,N-dimethylnitramine as the simplest N-NO2 derivative were studied by a set of experimental and theoretical methods w ith the aim to determine the components of the polarizability ellipsoid of the N-NO2 group and develop a valence-optical scheme for calculating the op tical and electrooptical parameters of N-NO2 compounds. Conjugation of the p electrons of the imide nitrogen atom with the pi electrons of the nitro g roup results in deviation of the properties of N,N-dimethylnitramine from t he additive values. Comparative evaluation of the parameters of the C-sp3-N O2, C-sp2-NO2, and N-NO2 groups was made.