Determination of Transformation Coefficients of the C2H4 Molecule

The object of theoretical research is the C 2 H 4 molecule, as it is important to know its properties to address numerous problems of molecular physics. The “expanded” local mode approach developed earlier was used for a X2Y4 molecule. This approach makes it possible to obtain simple expressions for the transformation coefficients of the investigated molecule, which subsequently allows one to determine various spectroscopic parameters of the C 2 H 4 molecule in a simple form.