“…In physical chemistry ethylene is also intensively studied since it can be considered as a prototype for a large number of organic molecules. As can be seen from the foregoing, the high-resolution ethylene spectra have long been the object of close attention (for example, see review presented in [12] and [13][14][15][16][17][18][19][20][21][22][23][24] [37][38][39]) between vibrational states 1> = ( 4 = 1, А 2 ) and |2> = ( 6 = 1, B 1 ) and has the following form [40,41]: …”