Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Tsonko Kolev"'
Autor:
Martina I. Peeva, Maya G. Georgieva, Aneliya A. Balacheva, Maria Ponticelli, Ivan P. Bogdanov, Tsonko Kolev, Luigi Milella, Hans-Georg Stammler, Nikolay T. Tzvetkov
Publikováno v:
Crystals, Vol 14, Iss 6, p 496 (2024)
Type II topoisomerases (TOP2s) play a key role in altering the DNA topology by transiently cleaving both strands of a DNA duplex. Therefore, increased TOP2 activity is associated with many cancers. Herein, we present the synthesis, structural charact
Externí odkaz:
https://doaj.org/article/417627a76d7a43dfb6e48a9fd8bfd51f
Publikováno v:
Acta Crystallographica Section E, Vol 64, Iss 9, Pp o1796-o1796 (2008)
In the title compound, C18H22N2O4, the dihedral angle between the pyrrolyl and quinolinyl fragments is 68.97 (2)°. Two non-classical intramolecular C—H...O hydrogen bonds stabilize the molecular geometry. In the crystal structure, molecules form i
Externí odkaz:
https://doaj.org/article/73df4eb7555a4e608f128ed883a8c048
Publikováno v:
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 194:189-193
A simple scheme for preparation of europium hydrogen squarate octahydrate microcrystals, Eu(HSq)3·8H2O is demonstrated. The microcrystalline powders obtained have a potential application as non-centrosymmetric and UV radiation – protective hybrid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d53cd76b9dc7f2280f97c42d0c458ab
https://doi.org/10.1016/j.saa.2018.01.024
https://doi.org/10.1016/j.saa.2018.01.024
Publikováno v:
Journal of Molecular Structure. 1102:235-241
A new crystalline complex of dl -serine and squaric acid (H2Sq) in stoichiometric ratio 1:1 ( dl -Ser·HSq) was synthesized, isolated and structurally characterized by single crystal X-ray diffraction. The compound crystallizes in the monoclinic spac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab9adc0992a0a5aedddae6009b978501
https://doi.org/10.1016/j.molstruc.2015.07.052
https://doi.org/10.1016/j.molstruc.2015.07.052
Publikováno v:
Journal of Chemical Crystallography. 45:86-93
The crystal structures of the 1:1 proton-transfer compounds of the dipolar donor-π-acceptor compound N,N-dimethyl-4-[(E)-2-(4-pyridinyl)vinyl]aniline (1), also named dimethylamino-stilbazole, with 3-nitrophthalic and perchloric acids, viz. (E)-4-[4-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::172dfc066d83fb6dc540aef13b8df62e
https://doi.org/10.1007/s10870-015-0569-z
https://doi.org/10.1007/s10870-015-0569-z
Autor:
Bojidarka Ivanova, Heike Mayer-Figge, William S. Sheldrick, Rüdiger W. Seidel, Marc Lamshöft, Tsonko Kolev, Michael Spiteller
Publikováno v:
Journal of Molecular Structure. 971:8-11
Ephedrinum violurate dihydrate was synthesized, spectroscopically and structural elucidated. The data are compared with those of the free-base ephedrine hemihydrate. Discussion on the stable conformer of the ephedrinum cation is carried out. Quantum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22d0da94458faad990bcdc251337de53
https://doi.org/10.1016/j.molstruc.2010.02.039
https://doi.org/10.1016/j.molstruc.2010.02.039
Autor:
Michael Spiteller, Bojidarka B. Koleva, Heike Mayer-Figge, Tsonko Kolev, Rumyana Bakalska, William S. Sheldrick, Rüdiger W. Seidel
Publikováno v:
Journal of Molecular Structure. 965:89-97
The correlation between the structural and the physical properties in solid state of two novel salts of cinchonine, cinchoninium violurate monohydrate (1) and cinchoninium squarate tetrahydrate (2), has been studied in dependence on protonation mode,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b159d59a5c0bae9f7bfe9e2746f5e601
https://doi.org/10.1016/j.molstruc.2009.11.043
https://doi.org/10.1016/j.molstruc.2009.11.043
Autor:
William S. Sheldrick, T. D. Tsanev, Bojidarka B. Koleva, Heike Mayer-Figge, Tsonko Kolev, Stefan V. Kotov, Michael Spiteller
Publikováno v:
Dyes and Pigments. 82:95-101
Two novel anyles of 4-benzolylpyridine, namely N , N -diethyl- N ′-[( Z )-phenyl(pyridin-4-yl)methylidene]benzene-1,4-diamine and its N -ethylpyridinium salt were synthesized and elucidated in detail spectroscopically, thermally and structurally, u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91ba173f61973ce5ffc052c872f727b4
https://doi.org/10.1016/j.dyepig.2008.11.008
https://doi.org/10.1016/j.dyepig.2008.11.008
Autor:
Rositca D. Nikolova, Rüdiger W. Seidel, Sonya Zareva, William S. Sheldrick, Tsonko Kolev, Heike Mayer-Figge, Bojidarka B. Koleva
Publikováno v:
Journal of Physical Organic Chemistry. 22:726-734
The novel pyridyl-substituted coumarin (1) and its perchlorate salt (2) have been synthesized and their structure and properties elucidated in detail spectroscopically, thermally and structurally, using single crystal X-ray diffraction for 2, linear-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f734b1af1e1d7b7f6e19a4b637421eb8
https://doi.org/10.1002/poc.1507
https://doi.org/10.1002/poc.1507
Autor:
William S. Sheldrick, Heike Mayer-Figge, Michael Spiteller, Bojidarka B. Koleva, Tsonko Kolev, Rüdiger W. Seidel
Publikováno v:
Journal of Molecular Structure. 931:45-49
The novel salt of a geminal diol 4-(dihydroxymethyl)pyridinium hydrogensquarate was derived from isonicotinaldehyde and squaric acid in water. Two polymorphs were characterized by means of single crystal X-ray diffraction and linear-polarized infrare
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25e24e4fad6ae6b0177906706af28471
https://doi.org/10.1016/j.molstruc.2009.05.025
https://doi.org/10.1016/j.molstruc.2009.05.025