Electronic spectral properties of quinoxalinones and thioquinoxalinones in different solvents

The electronic absorption spectra of 3-benzyl-1H- quinoxalin-2- one and 3-benzyl-1H-quinoxalin-2-thione in solvents of different polarity were analyzed by the multiple regression technique using the equation psi = a[0] + a[1]x[1] + a[2]x[2] + a[3]x[3] +.... The constants a[1], a[2], a[3], ' are the different regression coefficients and the constant a[0] is the regression intercept. The x[1], x[2], x[3], ' are different solvent polarity parameters. The multiple regression coefficients [MRC] were also calculated. The values of the acid dissociation constants of both compounds were determined