The Synthesis of New Organoselenium Heterocyclic Compounds: 2,4-Diaryl-5,6,7,8-Tetrahydroselenochromilium’s Salts

The synthesis of novel organoselenium heterocyclic compounds is of great theoretical and practical interest because of high biological activity. The known methods of synthesis of hexatomic selenium containing heterocyclic compounds allow us to obtain only monoaryl-substituted tetrahydroselenochromilium salts. In this study, the reactions of 2-(3-oxo-1-aryl-3-phenylpropyl) cyclohexanones were carried out with hydrogen selenide in situ under conditions of acid catalysis in diethyl ether.

Synthesis of Monodisperse Magnetite: The Effect of Temperature, Sodium Hydroxide and Citric Acid Concentrations on the Size of Nanoparticles

The effect of temperature, sodium hydroxide and citric acid concentrations on the size of magnetic magnetite nanoparticles was studied. Optimal conditions for synthesis of magnetite stabilized by citric acid with narrow size distribution were found. The average size of the nanoparticles determined by dynamic light scattering and transmission electron microscopy 12 ± 3 and 6 ± 2 nm, respectively was established. The chemical composition and structure of magnetite nanoparticles was confirmed by X-ray diffraction method.

Synthesis and Spectroscopic Study of Some Phenylazonaphthols

Synthesis of eight phenylazonaphthols containing hydroxyl-, carboxy-, sulpho- and aldehyde groups was described. The data concerning elemental, thermogravimetric analysis, NMR-spectra and electronic absorption spectra in ethanol were described.