Studies of vibrational spectra of 6-fluorothymine and its methyl derivatives

Article abstract of DOI:10.1016/0584-8539(90)80105-8

The solid and the argon-matrix isolated samples of 6-fluorothymine, 1-methyl-6-fluorothymine, 1,3-dimethyl-6-fluorothymine and 3-methylfluorothymine are studied at low temperatures by i.r. spectroscopy.The spectra obtained are interpreted using the calculation of planar normal vibration frequencies.The electronegative fluorine atom in the 6-position is shown to have a strong influence on the normal vibration frequency changes of crystalline and isolated thymine.N-H...F hydrogen bonds are evidenced to exist in crystalline samples.