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Dive into the research topics where V. V. Kopeikin is active.

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Featured researches published by V. V. Kopeikin.


Kinetics and Catalysis | 2001

Kinetics of the Reactions of 4-Nitrochlorobenzene with Substituted Phenolates in an Aprotic Polar Solvent

V. I. Mil'to; V. Yu. Orlov; G. S. Mironov; V. V. Kopeikin

The kinetics of 4-nitrochlorobenzene reactions with substituted phenolates in the medium of N,N-dimethylacetamide was studied. The BrØnsted relation is fulfilled by substituted potassium phenolates: the nucleophilicity of phenolates increases with an increase in their basicity. The rate-limiting step in the reactions of 4-nitrochlorobenzene with substituted phenolates and potassium resorcinate is changed from the phenoxide anion to the phenoxide dianion. In the latter case, electron transfer from the resorcinate dianion with the generation of radical species can be responsible for the reaction rate.


Kinetics and Catalysis | 2001

Kinetics of the Reactions of 4-Nitrochlorobenzene with Substituted Phenols in the Presence of Potassium Carbonate

V. I. Mil'to; V. Yu. Orlov; G. S. Mironov; V. V. Kopeikin

The kinetics of 4-nitrochlorobenzene (4-NCB) reactions with substituted phenols in the presence of potassium carbonate in N,N-dimethylacetamide was studied. Depending substituents, the reactivity of the phenols is changed in the series 3-NO2> 4-Cl > H > 4-Br > 3-CH3> 3-NH2, which is consistent with the series of their acidity. The reaction rates satisfactorily correlate with the pKavalues of the corresponding substituted phenols. Based on kinetic data (first-order and zero-order reactions with respect to phenol and 4-NCB, respectively, and the consistency of the reactivity and acidity of substituted phenols), the deprotonation of phenols is considered as the rate-determining step of the overall reaction under the test conditions. A reaction scheme was proposed for the synthesis of diaryl ethers in the presence of potassium carbonate. It involves a heterogeneous step of phenol deprotonation, which takes place on the surface of potassium carbonate, and a homogeneous step of the interaction of potassium phenolates with 4-NCB. Under the reaction conditions, the resulting bicarbonate decomposes with the formation of potassium carbonate and with the release of carbon dioxide and water.


Russian Journal of Organic Chemistry | 1998

SUBSTITUENT EFFECT ON THE REACTION RATE OF PARA-SUBSTITUTED NITROBENZENES WITH PHENYLACETONITRILE

V. Yu. Orlov; A. D. Kotov; A. I. Rusakov; E. B. Bystryakova; V. V. Kopeikin; G. S. Mironov


Russian Journal of Organic Chemistry | 1996

ORIENTATION OF NUCLEOPHILIC SUBSTITUTION OF HYDROGEN IN AROMATIC NITRO COMPOUNDS

V. Yu. Orlov; A. D. Kotov; V. V. Kopeikin; T. N. Orlova; A. I. Rusakov; G. S. Mironov


Journal of Applied Spectroscopy | 1994

Influence of the nature of substituents in nitrobenzene derivatives on spectral characteristics of the Nitro Group

N. S. Shvyrkova; V. Yu. Orlov; V. V. Kopeikin


ChemInform | 2010

Influence of the Solvent on the Reaction of p-Nitrochlorobenzene with Phenylacetonitrile in Strong Basic Medium.

A. D. Kotov; V. Yu. Orlov; V. V. Kopeikin; G. S. Mironov


ChemInform | 2010

Reactions of 1,1,1‐Trichloro‐2,2‐diarylethanes.

S. G. Sibrikov; V. N. Kazin; V. V. Kopeikin; N. S. Shvyrkova


ChemInform | 2010

Synthesis and Structure of 2,1-Benzisoxazoles from Dibenzofuran Derivatives.

A. D. Kotov; V. Yu. Orlov; T. N. Orlova; V. V. Kopeikin


ChemInform | 2010

Synthesis of Nitro-Substituted Benzophenones from 1,1,1-Trichloro-2,2- diphenylethane.

S. G. Sibrikov; V. N. Kazin; V. V. Kopeikin; T. N. Orlova


ChemInform | 2010

Dehydrochlorination Reactions of Substituted 1,1,1-Trichloro-2,2- diarylethanes. Mechanisms and Reagents

S. G. Sibrikov; V. N. Kazin; V. V. Kopeikin

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V. Yu. Orlov

Yaroslavl State University

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G. S. Mironov

Yaroslavl State University

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A. D. Kotov

Yaroslavl State University

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A. I. Rusakov

Yaroslavl State University

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N. S. Shvyrkova

Yaroslavl State University

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T. N. Orlova

Yaroslavl State University

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V. I. Mil'to

Yaroslavl State University

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