Abstract The present study aimed to determine an efficient and solvent-free method to
synthesize 2-methyl-4-quinolinol (2MQ, also known as 4-hydroxy-2-methylquinoline) and
includes spectroscopic investigations and computational studies. Molecular geometry and
vibrational wavenumbers of 2MQ were investigated using the density functional
(DFT/B3LYP) method with 6-311++ G (d, p) and 6-311++ G (2d, p) basis sets. According to
calculations, the keto form of 2MQ is more stable than the annual form, and the dimeric .