Dielectric and FTIR studies on the hydrogen bonded binary system of ester and alcohol

Concentration dependent dielectric constant, relaxation time, excess dielectric constant, excess inverse relaxation time and the effective Kirkwood correlation factor of the binary mixture of methyl acetate with butanol and pentanol, over the entire mixing range have been determined at room temperature. The values of these functions emphasize on the hydrogen bond interactions between the unlike molecules in ester-alcohols mixtures, the nature of which depends on the extent of substitution of the alcohols. The concentration depending values of excess dielectric constant and excess inverses relaxation time were used to analyze the hydrogen bonding complexes formed between unlike molecules and the strength of the molecular connectivities in the binary mixtures. Conformational analysis of the formation of hydrogen bond is also supported by the FTIR study.