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Dive into the research topics where Valery I. Kovalenko is active.

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Featured researches published by Valery I. Kovalenko.


Phosphorus Sulfur and Silicon and The Related Elements | 2011

New Method for the Preparation of Octathiotetraphosphetanes on the Basis of Elemental Phosphorus and Sulfur: Structure and Properties

O. G. Sinyashin; E. S. Batyeva; Valery I. Kovalenko; E. K. Badeeva; Elena V. Platova; A.E. Vandyukov; Elena E. Zvereva; Lidiya I. Kursheva

Abstract New octathiotetraphosphetane ammonium salts are obtained based on the reaction of white phosphorus (Р4) and elemental sulfur with aliphatic mercaptans in the presence of amines (morpholine, methylmorpholine, pyrrolidine, and N,N-dimethylbenzylamine). The salts of octathiotetraphosphetane are characterized by IR/Raman spectroscopy. Several common IR and Raman bands can be used as structural markers for establishing the structures of [P4S8]4− anion in new compounds.


ChemInform | 2001

The synthesis of N-isocyanurato-substituted aziridino[1,2][60]fullerenes

I. P. Romanova; G. G. Yusupova; S. G. Fattakhov; A. A. Nafikova; Valery I. Kovalenko; Vitalii V. Yanilkin; V. Kataev; N. M. Azancheev; V. S. Reznik; O. G. Sinyashin

N-Isocyanurato-substituted aziridino[1,2][60]fullerenes were synthesized for the first time as the main products by the reaction of isocyanurato-substituted azides with C60. The thermal stability and the electrochemical behavior of the compounds synthesized were studied.


Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2010

IR and NMR spectra, intramolecular hydrogen bonding and conformations of para-tert-butyl-aminothiacalix[4]arene in solid state and chloroform solution.

Elena E. Zvereva; Sergey A. Katsyuba; A.E. Vandyukov; A. V. Chernova; Valery I. Kovalenko; Svetlana E. Solovieva; I. S. Antipin; Alexander I. Konovalov

It is demonstrated that dissolution of aminothiacalix[4]arene in chloroform results in transformation of 1,3-alternate conformation, adopted in single-crystal and bulk polycrystalline solids, to the pinched-cone form. This conformer is stabilised by the intramolecular hydrogen bonds of two distal amino-groups acting as H-donors with another two amino moieties that appear as H-acceptors. The H-bonds cause quite small (ca. 10-20 cm(-1)) red shift of the IR bands of the NH(2) stretching vibrations, which suggests rather weak NHcdots, three dots, centeredN hydrogen bonding. This latter is sufficient to stabilize the pinched-cone conformation in the chloroform solution, but the energy gap between the pinched-cone and other conformations is small, and solid-state intermolecular forces easily overcome it, leading to realisation of the 1,3-alternate conformer. The comparison of the DFT computed and experimental vibrational and NMR spectra demonstrates good quality of present quantum-chemical computations, allows complete interpretation of the spectra and reveals simple IR and NMR spectroscopic markers of the conformers of aminothiacalix[4]arenes.


Phosphorus Sulfur and Silicon and The Related Elements | 1999

Synthesis and Structure of the Heterocyclic Phosphorus Containing Derivatives of [60] Fullerene

O. G. Sinyashin; I. P. Romanova; G. G. Yusupova; Valery I. Kovalenko; Yuri Ya Efremov; Irina I. Vandyukova; Yuri V. Badeev; N. M. Azancheev

Abstract Data on the structure of cycloadducts of organophosphorus dipolar reagents and fullerenes arc absent, to our knowledge. We died the reactions and the shucturc of cycloadducts of phosphorylated azidcs and nitrile oxide with [60]fullcrcnc. The cycloaddition of diphcnylphosphinic llzide to fullcrme has bcm determined to lead to the 1 -[(N-diphenylphosphoryl)amino]-2-hydroxy[6O]hllcrme (l), the mixhuc of phosphorylated aziridinofullcrcne (2) and derivative of fullerne (3) with one aziridine fragment and one aminohydmxy-fragment, or to product (4), depending on the conditions of don .


Russian Chemical Reviews | 2006

Regularities in the molecular structures of stable fullerenes

Valery I. Kovalenko; A R Khamatgalimov


Mendeleev Communications | 2000

Synthesis and electrochemical properties of N-isocyanurate-substituted aziridino[1,6][60]fullerene, an unusual product of cycloaddition to the 5,6-junction of fullerene

O. G. Sinyashin; I. P. Romanova; G. G. Yusupova; Valery I. Kovalenko; Vitalii V. Yanilkin; N. M. Azancheev


Mendeleev Communications | 2000

Synthesis and electrochemical properties of the N-isocyanurate derivative of azahomo[60]fullerene

O. G. Sinyashin; I. P. Romanova; G. G. Yusupova; A. A. Nafikova; Valery I. Kovalenko; N. M. Azancheev; Vitalii V. Yanilkin; Yulia G. Budnikova


Mendeleev Communications | 1998

Cycloaddition of phosphorylnitrile oxide to C60

O. G. Sinyashin; I. P. Romanova; Farida R. Sagitova; Valeriy A. Pavlov; Valery I. Kovalenko; Yuri V. Badeev; N. M. Azancheev; Akhat V. Ilyasov; A. V. Chernova; Irina I. Vandyukova


Mendeleev Communications | 2002

Synthesis and electrochemical properties of 2-(azahomo[60]fullereno)-5-nitropyrimidine

I. P. Romanova; Vladislav V. Kalinin; Dmitry G. Yakhvarov; A. A. Nafikova; Valery I. Kovalenko; Pavel V. Plekhanov; Gennady L. Rusinov; O. G. Sinyashin


Russian Chemical Reviews | 1995

Inhomogeneity in the molecular structure of cellulose nitrates

Valery I. Kovalenko

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O. G. Sinyashin

Russian Academy of Sciences

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I. P. Romanova

Russian Academy of Sciences

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N. M. Azancheev

Russian Academy of Sciences

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A. A. Nafikova

Russian Academy of Sciences

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G. G. Yusupova

Russian Academy of Sciences

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A. V. Chernova

Russian Academy of Sciences

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A.E. Vandyukov

Russian Academy of Sciences

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Elena E. Zvereva

Russian Academy of Sciences

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