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  1. No Access

    Article

    Quantum-chemical treatment of the mechanism of urethane formation by the extended Hückel method

    1. Potential curves for model reactions of urethane formation have been calculated by the extended Hückel method...

    S. P. Bondarenko, R. P. Tiger… in Bulletin of the Academy of Sciences of the… (1977)

  2. No Access

    Article

    Mixed hydride complexes of rhodium with triphenylphosphine and d-α-methylbenzylamine as catalysts for homogeneous asymmetric hydrogenation reactions

    1. Circular dichroism, electronic spectra, and PMR methods have been used to study the formation of mixed comple...

    L. M. Koroleva, E. V. Borisov, V. K. Latov… in Bulletin of the Academy of Sciences of the… (1978)

  3. No Access

    Article

    Influence of the nature of the substituents and the medium on the mechanism and rate of proton transfer in diaryltriazenes

    1. Electron-donor substituants in an aryl radical of symmetric diaryltriazenes (DAT's) accelerate the prototropi...

    A. N. Nesmeyanov, E. V. Borisov… in Bulletin of the Academy of Sciences of the… (1981)

  4. No Access

    Article

    Effect of substituents on the tautomeric equilibrium of 1(3)-(4-fluorophenyl)-3(1)-aryltriazenes in THF and pyridine

    1. The location of the tautomeric equilibrium of 1(3)-(4-fluorophenyl)-3(1)-aryltrizenes in THF and pyridine dep...

    E. V. Borisov, A. S. Peregudov… in Bulletin of the Academy of Sciences of the… (1986)

  5. No Access

    Article

    Nonempirical study of oxyphosphonitride (PNO) isomers

    Theoretical estimates were obtained for the first time for the molecular and electronic characteristics of the singlet and triplet states of oxyphosphonitride isomers and the transition states of their interco...

    A. A. Korkin, A. M. Mebel', E. V. Borisov in Bulletin of the Academy of Sciences of the… (1988)

  6. No Access

    Article

    Appearance of the magnetic isotope effect during the photolysis of aqueous solutions of cycloheptanone

    S. V. Rykov, E. D. Skakovskii… in Bulletin of the Russian Academy of Science… (1992)

  7. No Access

    Article

    Comparative nonempirical study and isodesmic calculations of heats of formation of HNCO and HPCO isomers

    The structural, electronic, and energetic characteristics of CHNO and CHOP isomers, and also of several related compounds, were calculated by a nonempirical method. Enthalpies of these isomers, obtained using ...

    E. V. Borisov, A. M. Mebel', B. A. Knyazev… in Bulletin of the Russian Academy of Science… (1992)

  8. No Access

    Article

    Hydrogen bonds and geometry of amide groups in 2- [2-acyl-(2-isoquinolinyl)] cycloalkan-1,3-diones

    The geometry of the amide groups and hydrogen bonds (formed by the enol protons and amide oxygen atoms) in 2-[2-acyl-(2-isoquinolinyl)]cycloalkan-1,3-diones has been studied by X-ray diffraction analysis. The ...

    E. V. Borisov, Yu. G. Chernov, L. G. Kuz'mina, V. A. Tereshko… in Russian Chemical Bulletin (1995)

  9. No Access

    Article

    13C NMR spectra of sterol derivatives, intermediates in the synthesis of ecdy-and brassinosteroids

    The13C NMR spectra of a series of steroids used to synthesize ecdy- and brassinosteroids are studied.

    N. V. Kovganko, Zh. N. Kashkan, E. V. Borisov in Chemistry of Natural Compounds (1999)

  10. No Access

    Article

    13C NMR spectra of β-sitosterol derivatives with oxidized rings A and B

    13C NMR spectra of stigmastane steroids are studied. Signals are assigned to C atoms.

    N. V. Kovganko, Zh. N. Kashkan, E. V. Borisov… in Chemistry of Natural Compounds (1999)

  11. No Access

    Article

    Lengthening of O−H distance of the intramolecular O−H...O hydrogen bonds in molecular systems with conjugation

    E. V. Borisov in Russian Chemical Bulletin (2000)

  12. No Access

    Article

    The structure of benzoyldimedone from X-ray diffraction analysis

    The structure of benzoyldimedone was established by X-ray diffraction analysis. The only tautomer was found. In this tautomer, the enol proton is covalently bound to the oxygen atom that is remote from the phe...

    E. V. Borisov, A. I. Verenich, A. A. Govorova, A. S. Lyakhov… in Russian Chemical Bulletin (2000)

  13. No Access

    Article

    13 NMR Spectra of Functionally Substituted 3β-Chloroderivatives of Cholesterol and β-Sitosterol

    13 C NMR spectra were studied and signals were assigned for C atoms of steroids 1-7

    N. V. Kovganko, Zh. N. Kashkan, E. V. Borisov in Chemistry of Natural Compounds (2000)