A. Maquestiau, Y. V. Haverbeke, R. Jacquerye
Sep 2, 2010
Citations
0
Influential Citations
5
Citations
Journal
Bulletin des Sociétés Chimiques Belges
Abstract
The tautomerism between CH, NH and OH forms of 1,3-dimethylpyrazoline-5-one has been investigated by use of I.R., N.M.R. and U.V. spectroscopy. In non polar solvents only the CH form is observed. In aprotic solvents, a linear relationship is obtained between the percent of the CH form and the basicity of the solvents, the decrease of CH form being in favor of the OH structure. In protic solvents it is difficult to discern the effect of acidity and dielectric constant in the appearance of the NH form.