Structure and properties of eleutherocide B,the glycoside of eleutherococcus senticosus maxim

Conclusions It is shown that eleutherocide B is identical with syringin, and is the-glucoside of sinapic alcohol.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1370–1372, June, 1969.     

Periodic character of the phase transformation in steel accompanying reflection of converging shock waves from the center of focusing

Special conditions in an experiment on the loading of low-carbon steel by converging shock waves made it possible to obtain residual microstructural changes of a periodic character, with a period of the order of 0.2 mm, which are associated with a phase transformation caused by waves reflected from the center of focusing. A model explaining the periodicity of the microstructure and making it possible to predict the behavior of materials under similar conditions is proposed. Pis’ma Zh. éksp. Teor. Fiz. 67, No. 10, 803–807 (25 May 1998)     

Carbolines

Anhydronium bases of 2-chloro--carbolines and 3,4-dihydro--carbolines are formed fay Beckmann rearrangement of - (3-indolyl) ketone oximes. In a number of cases the formation of anhydronium bases becomes the predominant process.See [1] for communication VII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 386–391, March, 1976.     

Effect of the chemical structure of a tetradentate equatorial ligand on the spin-crossover properties of the Fe (III) complexes chain structures: Electron paramagnetic resonance study

The effect of the chemical structure of the equatorial ligand on the spin state of the Fe (III) ion in a series of 1-D chain complexes of the general formula [Fe(L)(tvp)]BPh₄·nCH₃OH, where L = dianions of Schiff base containing a different number of aromatic groups: N,N′-ethylenebis (salicylaldimine) (salen) 1 , N,N′-ethylenebis (acetylacetone)2,2′-imine (acen) 2 , N,N′-ethylenebis (benzoylacetylacetone)2,2′-imine (bzacen) 3 , and tvp = 1,2-di(4-pyridyl)ethylene, was studied by ultraviolet–visible (UV–vis) and electron paramagnetic resonance (EPR) methods. The values of exchange interactions, thermodynamic parameters of spin-crossover, and electronic structure features of the Fe (III) complexes were estimated from the EPR data. The substitution of a fragment of the equatorial ligand L in the series salen–acen–bzacen changes the local symmetry of the complex in the 1-D chain, thereby affecting the spin variable properties.     

Alkoxysilanes and disiloxanes comprising mesoionic sydnon-4-yl heterocyclic substituent

Russian Chemical Bulletin -     

Acid-base properties of 1,2,5-oxadiazoles. 1. Methylfurazans

The basicities of 3-methyl-4-R-furazans (R = H, CH₃, C₂H₅, n-C₃H₇, NH₂ NHAcOCH₃, I, COOH, and NO₂) were investigated by PMR spectroscopy. It is shown that they are weak bases, the protonation of which is described by the H_A acidity function. Relationships between the chemical shifts of the protons of the methyl group and the R ° constants and the p _aBH ^K + and the M ° constants of the substituents were found.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 35–37, January, 1981.