HYDROGEN-BONDS FORMED BY METHYL-GROUPS OF ACETONITRILE - INFRARED ANDCALORIMETRIC STUDY

Solutions of acetonitrile (1) in tetrachloromethane and deuteratred so lvents (S) (benzene, acetonitrile, acetone and dimethylsulphoxide) hav e been studied by IR absorption spectra. The observed solvent effect o n the IR spectrum of I was explained in terms of the existence of comp lexes with hydrogen bonding of the type N-C-CH3...solvent (S). The str ength of the hydrogen bonding was characterized by enthalpies of speci fic interactions of I with solvents DELTAH(int)I/S(sp). The values DEL TAH(int)I/S(sp) were determined both by IR spectroscopy and calorimetr y and were found to be within the range 0.3-1.5 kcal mol-1.