Effect of the medium on the reaction of 4-methyl-7-azaindoline with acetic and trifluoroacetic acids
- 21 Downloads
The effect of the medium on the equilibrium involved in proton transfer via a hydrogen bond and dissociation of ion pairs in systems composed of 4-methyl-7-azaindoline and acetic and trifluoroacetic acids was examined by means of PMR and IR spectroscopy. The position of the molecular H complex ⇌ ion pair equilibrium depends on the proton-donor-acceptor properties of the solvent and is shifted to favor the ionic form in the order CH3CN < CH2Cl2< CDCl3. A change in the dielectric constant of the medium affects mainly the degree of dissociation of the ion pairs.
KeywordsHydrogen Spectroscopy Acetic Hydrogen Bond Organic Chemistry
Unable to display preview. Download preview PDF.
- 1.G. G. Dvoryantseva, T. N. Ul'yanova, Yu. N. Sheinker, D. M. Krasnokut-skaya, and L. N. Yakhontov, Khim. Geterotsikl. Soedin., No. 1, 76 (1976).Google Scholar
- 2.G. S. Denisov, G. V. Gusakova, and A. L. Smolyansky, Spectr. Lett., 4, 237 (1971).Google Scholar
- 3.G. V. Gusakova, G. S. Denisov, and A. L. Smolyanskii, Zh. Prirodn. Soedin., 16, 320 (1972).Google Scholar
- 4.M. Rumeau, Ann., 8, 131 (1973).Google Scholar