For the molecule of 9,10-anthraquinone, vibration frequencies and inte
nsities have been calculated, and a theoretical spectral curve has bee
n plotted, giving an adequate reflection of experimental manifestation
s over a broad spectral interval. This study made it possible to obtai
n a correct system of parameters for a model of the 9,10-anthraquinone
molecule. Theoretical analysis has provided a basis for distinguishin
g vibration frequencies, active in the spectrum, that are characterist
ic with respect to frequency and intensity.