Zobrazeno 1 - 6
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pro vyhledávání: '"D. V. Levchenkov"'
Publikováno v:
Russian Chemical Bulletin. 51:1071-1074
The mercury derivatives of primary nitramines were proved by molecular spectroscopy and quantum-chemical calculations to be covalent compounds. The mercury atom was found to be coordinated to the amine nitrogen atom.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44f2eae21efafb08078b66d46c8ab447
https://doi.org/10.1023/a:1019642508881
https://doi.org/10.1023/a:1019642508881
Autor:
V. A. Shlyapochnikov, D. V. Levchenkov
Publikováno v:
Journal of Applied Spectroscopy. 68:9-13
Using a specific numerical example, we consider and discuss a problem of correction of quantum–chemical force fields because of the ambiguous selection of the systems of scaling factors. Additional conditions are suggested that make it possible to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02368ba45578daa4bcd1a4f118653966
https://doi.org/10.1023/a:1019244632057
https://doi.org/10.1023/a:1019244632057
Publikováno v:
Russian Chemical Bulletin. 50:1173-1180
Spectroscopic parameters of trinitromethane derivatives RC(NO2)3 (R = F, Cl, Br, I, NC, NF2, N3) were determined. Vibrational frequencies and modes were calculated and the assignment of experimental spectra was performed. Spectral features due to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40abe4ec030ba61ef43ea66ea784712a
https://doi.org/10.1023/a:1014082001457
https://doi.org/10.1023/a:1014082001457
Autor:
D. V. Levchenkov
Publikováno v:
Computational Mathematics and Modeling. 12:65-72
Numerical methods are applied to calculate the characteristics of ruin games with large prizes. Discovery of relationships between the characteristics substantially simplifies the calculations. An effective algorithm is proposed for solving the probl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d849a6970bcad02c3bb98bcf9aecf50
https://doi.org/10.1023/a:1012574314645
https://doi.org/10.1023/a:1012574314645
Publikováno v:
Russian Chemical Bulletin. 50:385-389
The molecular structures of trinitromethane derivatives XC(NO2)3 (X = F, Cl, Br, NC, NF2, N3) were studied using the density functional approach. The rules for changing the configurations of substituents in these compounds were revealed. Acceptabilit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc46a4323348896f9e85a89e87dc59ed
https://doi.org/10.1023/a:1011336502207
https://doi.org/10.1023/a:1011336502207
Autor:
V. S. Levchenkov, D. V. Levchenkov
Publikováno v:
Computational Mathematics and Modeling. 11:312-320
The article examines the problem of describing the symmetry of a one-dimensional figure by power sums of the coordinates of its points. In case ofn points of unit mass, the figure symmetry requires [(n+1)/2] values of odd power sums; in case of massi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55f184f7a6e6238e4b20c2ce5b699787
https://doi.org/10.1007/bf02361137
https://doi.org/10.1007/bf02361137