Open‐chain unsaturated selanyl sulfides: stereochemical structure and stereochemical behavior of their 77Se–1H spin–spin coupling constants

Stereochemical structure of nine Z‐2‐(vinylsulfanyl)ethenylselanyl organyl sulfides has been investigated by means of experimental measurements and second‐order polarization propagator approach calculations of their ¹H–¹H, ¹³C–¹H, and ⁷⁷Se–¹H spin–spin coupling constants together with a theoretical conformational analysis performed at the MP2/6‐311G** level. All nine compounds were shown to adopt the preferable skewed s‐cis conformation of their terminal vinylsulfanyl group, whereas the favorable rotational conformations with respect to the internal rotations around the C–S and C–Se bonds of the internal ethenyl group are both skewed s‐trans. Stereochemical trends of ⁷⁷Se–¹H spin–spin coupling constants originating in the geometry of their coupling pathways and the selenium lone pair effect were rationalized in terms of the natural J‐coupling analysis within the framework of the natural bond orbital approach. Copyright © 2012 John Wiley & Sons, Ltd.     

Investigation of the structure of 2h,6h-2,6-dimethyl-4-amino-1,3,5-dithiazine by IR spectroscopy

It was established by IR spectroscopy that 2H,6H-2,6-dimethyl-4-amino-1,3,5-di-thiazine exists in the amino form in carbon tetrachloride at low concentrations.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1050–1053, August, 1981.     

A simple synthesis of 2-methyl-1,4-dithiacycloheptane from diallyl sulfide and hydrogen sulfide

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, PP. 2669–2670, November, 1990.     

Dependence of the magnetic properties of an amorphous metal alloy on its nanoporosity

Magnetic and structural properties of an amorphous alloy based on iron are investigated. The properties and state of the alloy are changed under hydrostatic pressure of up to 1.3 GPa. An increase in the pressure leads to a linear increase in the maximum magnetic induction and a linear decrease in the remanence. Two nanopore fractions with average sizes of ～20 and 150 nm are revealed in the alloy with the use of small-angle x-ray diffraction. The application of the pressure decreases the size of nanopores and increases the average distance between their boundaries, i.e., increases the average sizes of continuity regions in the alloy. It is established that the relative change in the magnetic characteristics is linearly related to the change in the size of the continuity regions in the alloy. Upon extrapolation to zero nanoporosity, the remanence reduces to zero. The inference is made that the nanopores play a dominant role (as compared to other structural defects) in the magnetic properties of the alloy.     

Efficient procedure of preparation of 3-bromo-2-phenylbenzo[b]selenophene from selenium dibromide and diphenylacetylene

Russian Journal of Organic Chemistry -     

New Polymeric Sorbents Based on N-(Vinyloxyethyl)dithiocarbamoylethylcarbonitrile

Homo- and copolymers based on N-(vinyloxyethyl)dithiocarbamoylethylcarbonitrile actively sorbing silver, gold, and mercury were prepared.     

Dipropadienyl telluride

Russian Chemical Bulletin -