77817-28-8Relevant articles and documents
RING-CHAIN TAUTOMERISM IN SUBSTITUTED HYDRAZONES. XV. N-BENZYL-N-(2-HYDROXYALKYL)HYDRAZONES OF AROMATIC CARBONYL COMPOUNDS
Potekhin, A. A.,Safronov, A. O.
, p. 322 - 328 (2007/10/02)
By spectral methods it was shown that the N-benzyl-N-(2-hydroxyethyl)- and N-benzyl-N-(2-hydroxypropyl)hydrazones of substituted benzaldehydes in the crystalline state and in solutions in tetrachloroethylene exist exclusively in the acyclic form.In solutions the analogous derivatives of acetophenones form tautomeric mixtures of the corresponding hydrazones and perhydro-1,3,4-oxadiazines.The equilibrium concentration of the cyclic form increases with increase in the electron-withdrawing character of the substituent in the molecule of the initial acetophenone.The ΔH0 and ΔS0 values for some tautomeric systems were obtained on the basis of the temperature dependance of the equilibrium constants.