Thermodynamic and UV Studies of Association Reaction between Phenols and Benzil Mono Benzylidene Aniline

Abstract

The study includes two complementary topics. Firstly, the influence of various concentrations of phenols on the UV absorption spectrum of benzil mono benzylidene aniline (BMBA) in different solvents. Experiments show a bathochromic shift in the UV spectrum of BMBA obtained after addition of phenol. When phenol is replaced by 2,4-dimethylphenol, rather similar results are observed. The results are interpreted interms of hydrogen bond formation between BMBA and phenol. Secondly, it is decided to confirm the hydrogen-bond formation stated above by thermodynamic method. Accordingly, the effect of temperature on the equilibrium constant value of the interaction between BMBA and phenol is considered. Evaluated thermodynamic parameters Δ