Conjugation effects and optical spectra of 1,2-diphosphole cycloadducts

Russian Chemical Bulletin - Quantum chemical calculations and a comparative analysis of Raman spectra of 3,4,5-triphenyl-1-propyl-1,2-diphosphole (1),...     

Synthesis and photophysical properties of 2,3,4,5-tetraphenyl-1-n-octyl-1-monophosphole

Russian Chemical Bulletin - A new method for the preparation of 2,3,4,5-tetraphenyl-1-octyl-1-monophosphole was developed. It was shown that the reaction of n-octyl chloride with a mixture of...     

Polymerization of butadiene under the action of lithium containing initiating system

Polymerization of butadiene under the action of n-butyl lithium modified by of alkali and alkaline earth metal alkoxides was researched. Microstructure and molecular characteristics of the samples of polybutadiene synthesized were determined. The influence of polymerization conditions on the properties of the resulting polymer was examined.     

Fullerenes C100 and C108: new substructures of higher fullerenes

Structural Chemistry - Based on our approach of theoretical modeling of the fullerene molecule electronic structures, an analysis of the molecular structures of isolated pentagon rule (IPR) isomer...     

Molecular structure of polybutadienes synthesized with a lithium-containing initiation system

With the use of high-resolution NMR spectroscopy (600 MHz) and gel-permeation chromatography, the products of anionic polymerization of butadiene initiated by n-butyllithium modified with sodium and magnesium alcoholates are studied. It is shown that a change in synthesis conditions makes it possible to vary the configuration and isomeric composition and molecular parameters of polybutadienes. The distribution of 1,2-, cis-1,4-, and trans-1,4-units in a chain has a pronounced statistical character and depends on the composition of the initiation system.     

Regeneration of the palladium catalyst of acetylene hydrogenation in modified supercritical CO<Subscript>2</Subscript>

The results of the regeneration of the deactivated palladium catalyst of acetylene hydrogenation using supercritical fluid extraction (T = 130°C, P = 250 bar) were reported. The activity of the catalyst regenerated in supercritical carbon dioxide is comparable to the activity of the catalyst regenerated by the conventional procedure.