... I., Kochikov I. V., Spiridonov V. P., Kuramshina G. M., Saakjan A. S. Scaling of Cubic Force Constants in Electron Diffraction Structure Analysis with Application to C 4 H 4 S as a Sample . Abstract The contributions of quantum chemical cubic constants of intramolecular force fields calculated in different approximations are considered with respect to analysis of theoretical electron diffraction intensities. ... Moscow University Chemistry Bulletin . 2001, Vol. ...