The electronic spectra of barbituric acid (BA) and thiobarbituric acid (TBA) in different solvents have been analyzed using the multiple linear regression technique to relate the shift in peak locations to some solvent polarity parameters. The PPP method has been used to study the tautomerism and calculate the different singlet-singlet electronic transitions in these molecules.
A M HEIBA ,M S MASOUD ,A A HASANEIN ,
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