Tomsk, Russia


Tomsk, Russia
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Shcheglova N.M.,LLC NIOST | Kolesnik V.D.,LLC NIOST | Ashirov R.V.,Tomsk Polytechnic University | Krasnokutskaya E.A.,Tomsk Polytechnic University
Russian Chemical Bulletin | Year: 2016

New ruthenium carbene complexes with chelating N- and S-benzylidene ligands were synthesized by the reactions of second- and third-generation Grubbs catalysts with ortho-vinylbenzyl-substituted amines or sulfides. These complexes were shown to exhibit catalytic activity in ring-opening metathesis polymerization and ring-closing metathesis. © 2016, Springer Science+Business Media New York.

Zilbershtein T.M.,RAS Institute of Petroleum Chemistry | Kardash V.A.,NIOST LLC | Suvorova V.V.,NIOST LLC | Golovko A.K.,RAS Institute of Petroleum Chemistry
Applied Catalysis A: General | Year: 2014

Decene formation in the ethylene trimerization reaction was studied using a chromium(III) 2-ethylhexanoate/2,5-dimethylpyrrole/triethylaluminum/ diethylaluminum chloride catalyst system. Kinetic investigations revealed that some decene formation reactions did not depend on 1-hexene concentration, because 1-hexene and catalyst may react with ethylene before dissociation of 1-hexene-catalyst complex after 1-hexene formation. The results demonstrated that decene formation is an intrinsic part of the trimerization reaction mechanism. It was also shown that a stepwise elimination mechanism for the decomposition of the chromacycloheptane intermediate cannot explain the observed product distribution. The dependencies found allow selection of appropriate conditions for low or high decene formation in the ethylene trimerization reaction. © 2014 Elsevier B.V. All rights reserved.

Shcheglova N.M.,NIOST Ltd. | Kolesnik V.D.,NIOST Ltd. | Ashirov R.V.,NIOST Ltd.
Russian Journal of Organic Chemistry | Year: 2013

A convenient procedure has been proposed for the synthesis ortho-vinylbenzyl-substituted ethers, amines, and sulfides via reaction of o-(2-bromoethyl)benzyl bromide with various nucleophiles. © 2013 Pleiades Publishing, Ltd.

Shcheglova N.M.,LLC nIOST | Kolesnik V.D.,LLC nIOST | Ashirov R.V.,LLC nIOST | Krasnokutskaya E.A.,Tomsk Polytechnic University
Russian Chemical Bulletin | Year: 2015

New ruthenium carbene complexes containing a six-membered N-chelating fragment were synthesized. A catalytic activity of these complexes in the olefin metathesis reactions was demonstrated. © 2015 Springer Science+Business Media New York.

Lodochnikova O.A.,RAS Arbuzov Institute of Organic and Physical Chemistry | Ashirov R.V.,NIOST Ltd. | Appolonova S.A.,Federal State Unitary Enterprise | Litvinov I.A.,RAS Arbuzov Institute of Organic and Physical Chemistry | Plemenkov V.V.,Kant Russian State University
Russian Journal of Organic Chemistry | Year: 2010

The reactions of 1-methylcycloprop-2-ene-1-carbonitrile with cyclohexa-1,4-diene and alloocimene gave the corresponding 2:1 addition products as a result of consecutive (conjugate) Alder-ene and Diels-Alder reactions. 1-Methylcycloprop-2-ene-1-carbonitrile acts initially as enophile, and in the second step, as dieno- phile. The structure of the adducts was determined by X-ray analysis. © 2010 Pleiades Publishing, Ltd.

Nesyn G.V.,LLC NIOST | Manzhai V.N.,RAS Institute of Petroleum Chemistry | Suleimanova Y.V.,LLC NIOST | Stankevich V.S.,LLC NIOST | Konovalov K.B.,Tomsk Polytechnic University
Polymer Science - Series A | Year: 2012

The mechanisms of action of polymer additives that affect drag during the turbulent flow of hydrocarbon liquids is studied. A laboratory method for estimating the ability of these additives to reduce the drag is developed. It is established that the data of laboratory experiments can be used for predicting the efficiency of polymer drag-reducing agents in the transportation of hydrocarbon liquids in industrial applications. The advantages and disadvantages of different methods for producing polymer drag-reducing agents are discussed. © Pleiades Publishing, Ltd., 2012.

Orlov A.S.,NIOST LLC | Kiselev S.A.,NIOST LLC | Kiseleva E.A.,NIOST LLC | Budeeva A.V.,NIOST LLC | Mashukov V.I.,NIOST LLC
Journal of Applied Spectroscopy | Year: 2013

A rapid method for determining the composition of styrene-butadiene rubber using attenuated total internal reflection infrared spectroscopy was proposed. PMR and 13C NMR spectroscopy and infrared transmission spectroscopy were used as absolute techniques for determining the compositions of calibration samples. It was shown that the method was applicable to a wide range of styrene-butadiene rubbers, did not require additional sample preparation, and was easily reproducible. © 2013 Springer Science+Business Media New York.

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