DFT study of solvent effects on 3-hydroxy-2-quinoxalinecarboxylic acid tautomers

By using the combination of density functional theory (DFT) B3LYP/6-311++G(d,g) within polarized continuum (PCM) model, solvent effects on 3-hydroxy-2-quinoxalinecarboxylic acid (3HQC) tautomers were investigated. Geometrical parameters, vibrational frequencies, electronic and energetic properties, and the nucleus-independent chemical shifts (NICS) were calculated in benzene, diethyl ether, and water. It has been seen that these molecular features of 3HQC are mostly solvent dependent.