Cooperative hydrogen bonding in solution: Influence of molecule structure (original) (raw)

Influence of cooperative interactions on IR stretching vibration frequencies of complexes CCl 3 HÁ Á ÁROHÁ Á ÁB (B-base), CCl 3 HÁ Á ÁROHÁ Á ÁO(C 2 H 5) 2 and CCl 3 HÁ Á ÁROHÁ Á ÁROH in proton donor solvent CCl 3 H were studied. Solvent effects on OH stretching vibration frequencies of CF 3 CH 2 OHÁ Á ÁB, ROHÁ Á ÁO(C 2 H 5) 2 and ROHÁ Á ÁROH complexes in aprotic solvents were calculated using earlier proposed method. Cooperativity factors in CCl 3 HÁ Á ÁCF 3 CH 2 OHÁ Á ÁB complexes were determined. Obtained values were significant smaller than for CCl 3 HÁ Á ÁCH 3 OHÁ Á ÁB complexes. Also cooperativity factors for CCl 3 HÁ Á ÁROHÁ Á ÁO(C 2 H 5) 2 and CCl 3 HÁ Á ÁROHÁ Á ÁROH complexes were determined. It was demonstrated that obtained values slightly depend on length and embranchment of alkyl group in alcohol molecules. The main role in cooperative interactions plays electronic effect.