The densities of moderately dilute solutions of 1-ethyl-3-methylimidazolium chloride (EMImCl) in butan-2-ol were measured (using Anton-Paar DMA 4500M densimeter) at different temperatures,10, 15, 20, 25, 30 and 35°C. From the obtained density data, volumetric properties (apparent molar volumes and partial molar volumes) have been evaluated. The volumetric data have been analyzed using Masson’s equation. The limiting apparent molar volume or partial molar volume at infinite dilution, and the slope of Masson’s equation at different temperatures for EMImCl in butan-2-ol have been interpreted in terms of ion-ion and ion-solvent interactions, respectively.

The Experimental data on the oxidation of pyridine and piperidine with “green oxidants” - H2O2, N2O is presented in this article. Reactions were carried out in the gas phase without the use of special catalysts and at atmospheric pressure in a flow-through quartz reactor. The study of coherent synchronized oxidation of pyridine bases using H2O2 and N2O was carried out in a wide range of varying process parameters; feed rates of H2O2, N2O and pyridine base, and temperature. The kinetic regularities of coherently synchronized reactions of hydrogen peroxide decomposition and oxidation of pyridine bases were studied experimentally.

Quantitative assessment of inducing action of the primary reaction (decomposition of hydrogen peroxide and nitrous oxide) on the secondary one (oxidation of the pyridine base), is presented using the determinant equation. Experiments proved that reaction products in the oxidation of pyridine and piperidine with hydrogen peroxide are as following: 2,2-oxydipyridyl (yield: 24.5 wt.%) and pyridine (yield: 65.2 wt.%) respectively. Optimal conditions for the oxidation of piperidine with nitrous oxide in coherent synchronization mode, where 19.4 wt.% of 2,3,4,5-tetrahydropyridine is formed, were identified.

With Regards,
Joseph Kent
Journal Manager
Journal of Der Chemica Sinica