Internal rotation and association in solutions of cumyl hydroperoxide according to IR spectroscopy data

Internal rotation and association in solutions of cumyl hydroperoxide in de cane, carbon tetrachloride, and chlorobenzene were studied by IR spectrosco py (3100-3600 cm(-1), 20-80 degreesC). The experimental data were interpret ed by factor analysis techniques and the decomposition of complex contours into constituent analytic contours. The di- and trimerization constants and the thermodynamic parameters of self-associates were determined. Solutions of cumyl hydroperoxide in nonpolar solvents were found to contain mixtures of the gauche-1 and gauche-2 conformers of monomeric molecules. The differ ence of the enthalpies of these conformers was determined. Cumyl hydroperox ide molecules were found to interact with solvents (chlorobenzene and carbo n tetrachloride).