Vibrational Spectroscopic Study of (E)-3-(4-fluorophenyl)-N-[4-(phenyl-amino) quinazoline-7-yl] Acrylamide

Geometry optimization and subsequent harmonic vibration calculations of prior synthesized (E)-3-(4-fluorophenyl)-N[4-(phenyl-amino) quinazoline-7-yl] acrylamide were carried out by DFT/B3LYP method with both 6-31G* and 6-311G** basis sets. The Infrared (IR) spectrum of the title compound was recorded in the field of 400-4000 cm(-1) and then assigned. The correlation analyses between the scaled theoretical vibration frequencies and the experimental ones indicate that there exist good linearity relationships since the correlation coefficients R-2 are larger than 0.999. The intramolecular interactions existed in the title molecule were confirmed by the Atoms in molecules (AIM) method, and their influences on the absorption frequency were also investigated.