Solvent Effect on Intramolecular Hydrogen Bondsin Push-Pull Conjugated Molecules

摘要

A series of molecules leading to resonance-assisted hydrogen bonding has been investigated by means of Backe's three-parameter functional and the gradientcorrected functional of Lee,Yang,and Parr/6-311G(d,p)computations.The solvent(carbon tetrachloride)is simulated by the self-consistent reaction field model.The influence of the molecular structure on the intramolecular proton transfer is analyzed.The effect of the solvent on the geometry of the hydrogen bonds and on the frequency of the stretching modes of the groups involved in these bonds is noticeable.A linear relationship between the vibratioal frequency and the bond length is found.