Russian Journal of General Chemistry

New isobornylphenol derivatives have been produced by introducing allyl, hydroxypropyl, and chloropropyl groups into the para-position of 2,6-diisobornylphenol and 2-isobornyl-6-(1-phenylethyl)phenol. The radical scavenging and antioxidant activity and the membrane-protective properties of the newly-obtained compounds in chemical and biological model systems were studied.

The reaction of bis[trialkyl(aryl)arsonium]-1,4-dihydronaphtalene iodides with mercuric iodide in water-alcohol solutions in the presence of excess potassium iodide gives rise to bisarsonium triiodomercurates.

Isocyanates readily reacts with NaN3 in the presence of ZnCl2 in organic solvents to form the corresponding carbamoyl azides. The formation of carbamoyl azides completed in 5–10 min at room temperature, which prevent the risk of release of hydrogen azide. The obtained carbamoyl azides without isolation can be used for the preparation of 1-substituted tetrazol-5-ones.

The reaction of sodium 1,6-dioxo-2,4-alkadiene-3,4-diolates with HCl solution afforded unexpected hydrolysis products, namely (2Z)-2-hydroxy-4-oxobut-2-enoic (2,4-dioxobutanoic) acid esters. The structural features of the synthesized compounds were discussed on the basis of IR, 1H NMR spectroscopy, mass spectrometry and X-ray diffraction analysis data.

The article discusses the main results of the academic studies in the field of organometallic chemistry of cyclic acetals conducted at the Academy of Sciences of the Republic of Bashkortostan by Academician D.L. Rakhmankulov. The results of the interaction of cyclic acetals and their heteroanalogues with Al-, Mg-, Si-organic compounds are presented. The relationship between the amount of carbon in cycloalkane and its activity in interaction with organoelement substances has been established.

Published data of various research techniques and own experimental results obtained by the X-ray structural analysis concerning structural characteristics of copper(II) aqua complexes in aqueous solutions of its salts under standard conditions have been generalized. Structural parameters of the nearest environment of this ion, such as coordination number, interparticle distances, and ionic association types, were considered. The possibility of the Jahn-Teller effect realization in aqueous solutions of Cu2+ salts was examined.

A direct calorimetric method was used to measure the heat effects in the reactions of formation of Cu(II) complexes with L-asparagine in aqueous solutions at 298.15 K and ionic strength 0.5, 1.0, 1.5 (KNO3). The standard thermodynamic characteristics (Δr H 0, Δr G 0, Δr S 0) of the processes of complex formation in the system under study were calculated.

The effects of the macrocycle structure and the medium nature on photodecomposition of porphyrinoids under UV irradiation have been studied. The influence of protonation, nonplanar structure of the molecule, and reactivity of NH bonds on the photostability of porphyrins and their analogs has been shown.