Výsledky vyhledávání - "bifurcated hydrogen bonds"

Akademický článek

Ethyl 4-oxo-1,4-dihydropyridine-3-carboxylate

Autor: Jun Gao, Sihui Long

Publikováno v: IUCrData, Vol 6, Iss 6, p x210555 (2021)

The title compound, C8H9NO3, likely generated through hydrolysis and esterification of 3′-carboxy-3-methyl-(1,4′-bipyridin)-1-ium chloride by ethanol, which contained water, has a nearly planar conformation. The crystal structure is sustained by

Externí odkaz: https://doaj.org/article/6f579852278a41659020db25f1365d2b

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Akademický článek

Crystal structures of the two salts 2-methyl-1H-imidazol-3-ium nitrate–2-methyl-1H-imidazole (1/1) and 2-methyl-1H-imidazol-3-ium nitrate

Autor: Mouhamadou Birame Diop, Libasse Diop, Thierry Maris

Publikováno v: Acta Crystallographica Section E: Crystallographic Communications, Vol 72, Iss 4, Pp 482-485 (2016)

The title salts, C4H7N2+·NO3−·C4H6N2, (I), and C4H7N2+·NO3−, (II), were obtained from solutions containing 2-methylimidazole and nitric acid in different concentrations. In the crystal structure of salt (I), one of the –NH H atoms of the imi

Externí odkaz: https://doaj.org/article/b886338a0aef410ca99451addeae3460

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Akademický článek

(5Z,7Z)-N5,N7-Bis(pyridin-2-yl)-5H-6,7-dihydropyrrolo[3,4-b]pyrazine-5,7-diimine

Autor: Maciej Posel, Helen Stoeckli-Evans

Publikováno v: IUCrData, Vol 3, Iss 5, p x180682 (2018)

The whole molecule of the title compound, C16H11N7, is relatively planar, with an r.m.s. deviation of 0.061 Å for all 23 heteroatoms. It exhibits symmetric three-centre (bifurcated) intramolecular hydrogen bonds. In the crystal, molecules are linked

Externí odkaz: https://doaj.org/article/da3c1efe659d43618c2728391e94a6ca

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Simple Rules for Complex Near-Glass-Transition Phenomena in Medium-Sized Schiff Bases

Publikováno v: International Journal of Molecular Sciences. 23(9):1-15

Glass-forming ability is one of the most desired properties of organic compounds dedicated to optoelectronic applications. Therefore, finding general structure–property relationships and other rules governing vitrification and related near-glass-tr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_____10125::c10a8bd69ab0b6b838d13e11053ae6ec
https://doi.org/10.3390/ijms23095185 10.3390/ijms23095185

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Akademický článek

Crystal structures of 4-(pyrimidin-2-yl)piperazin-1-ium chloride and 4-(pyrimidin-2-yl)piperazin-1-ium nitrate

Autor: Thammarse S. Yamuna, Jerry P. Jasinski, Manpreet Kaur, Brian J. Anderson, H. S. Yathirajan

Publikováno v: Acta Crystallographica Section E, Vol 70, Iss 10, Pp 203-206 (2014)

The title salts, C8H13N4+·Cl−, (I), and C8H13N4+·NO3−, (II), contain linked pyridinium–piperazine heterocycles. In both salts, the piperazine ring adopts a chair conformation with protonation at the N atom not linked to the other ring. In the

Externí odkaz: https://doaj.org/article/577f438322a04fb7b63be460a9f103a2

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Akademický článek

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Akademický článek

(E)-4-Methoxy-N′-(2,4,5-trifluorobenzylidene)benzohydrazide monohydrate

Autor: R. Maheswari, J. Manjula, B. Gunasekaran, G. Bakiyaraj

Publikováno v: IUCrData, Vol 1, Iss 5, p x160846 (2016)

The title Schiff base compound, C15H11F3N2O2·H2O, crystallized as a monohydrate. The conformation about the C=N bond is E. The molecule is almost planar, with the dihedral angle between the planes of the methoxybenzene and trifluorobenzylidene rings

Externí odkaz: https://doaj.org/article/1720160b21ec4c7ba54a0e39ed1e84fc

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