Results 31 to 40 of about 825,816 (298)

Fifteen 4-(2-methoxyphenyl)piperazin-1-ium salts containing organic anions: supramolecular assembly in zero, one, two and three dimensions

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2020
Fifteen 4-(2-methoxyphenyl)piperazin-1-ium salts containing organic anions have been prepared and structurally characterized. In the isostructural 4-chlorobenzoate and 4-bromobenzoate salts, C11H17N2O+·C7H4ClO2− (I) and C11H17N2O+·C7H4BrO2− (II), and the
Chayanna Harish Chinthal   +5 more
doaj   +1 more source

Bis(dimethylammonium) 3,3′-dicarboxy-5,5′-(5,7,12,14-tetraoxo-6,13-diazatetracyclo[6.6.2.04,16.011,15]hexadeca-1,3,8,10,15-pentaene-6,13-diyl)dibenzoate dihydrate

open access: yesActa Crystallographica Section E, 2012
The title compound, 2C2H8N+·C30H12N2O122−·2H2O, comprises dimethylammonium cations, 3,3′-dicarboxy-5,5′-(5,7,12,14-tetraoxo-6,13-diazatetracyclo[6.6.2.04,16.011,15]hexadeca-1,3,8,10,15-pentaene-6,13-diyl ...
Lan-Ping Xu, Lan Qin, Lei Han
doaj   +1 more source

Hydrogen-bonding interactions in the crystalline-phase structures of cinnamic acid derivatives [PDF]

open access: yes, 1999
Secondary interactions responsible for the crystalline-phase structures of various cinnamic acids and cinnamic acid esters drawn from the Cambridge Structural Database were studied with the help of the Cerius package implemented on an SGI workstation ...
Pálinkó, István
core   +1 more source

Ethyl 4-(4-hydroxyphenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate monohydrate

open access: yesActa Crystallographica Section E, 2008
There are three formula units in the asymmetric unit of the title compound, C14H16N2O4·H2O. Molecules are linked by N—H...O hydrogen bonds into dimers with the common R22(8) graph-set motif.
T. N. Guru Row   +4 more
doaj   +1 more source

The Ionic Hydrogen Bond [PDF]

open access: yesChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
openaire   +2 more sources

Isotopic fractionation in proteins as a measure of hydrogen bond length [PDF]

open access: yes, 2015
If a deuterated molecule containing strong intramolecular hydrogen bonds is placed in a hydrogenated solvent it may preferentially exchange deuterium for hydrogen.
Athokpam, Bijyalaxmi   +2 more
core   +2 more sources

Analysis of Hydrogen Bonds in Crystals

open access: yesCrystals, 2016
The determination of crystal structures provides important information on the geometry of species constituting crystals and on the symmetry relations between them.
Sławomir J. Grabowski
doaj   +1 more source

Syntheses and crystal structures of 2,2,5-trimethyl-1,3-dioxane-5-carboxylic acid and 2,2,5-trimethyl-1,3-dioxane-5-carboxylic anhydride

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2020
In 2,2,5-trimethyl-1,3-dioxane-5-carboxylic acid, C8H14O4, the carboxyl group occupies an equatorial position on the 1,3-dioxane ring. In the crystal, O—H...O hydrogen bonds form chains of molecules, which are linked into a three-dimensional network by C—
Joseph A. Giesen   +2 more
doaj   +1 more source

A comparative molecular dynamics study of sulfuric and methanesulfonic acids [PDF]

open access: yes, 2016
The molecular dynamics computer simulation method has been used to study sulfuric and methanesulfonic acids. Calculations have been carried out between 200 K and 400 K using reliable force fields.
Canales Gabriel, Manel   +1 more
core   +2 more sources

Ethyl 2-(2,5-dioxo-4,4-diphenylimidazolidin-1-yl)acetate

open access: yesIUCrData, 2017
The five-membered ring of the title compound, C19H18N2O4, adopts an envelope conformation. In the crystal, pairwise N—H...O hydrogen bonds form centrosymmetric dimers which are connected into chains parallel to the c-axis direction by pairwise C—H...O ...
Youssef Ramli   +5 more
doaj   +1 more source

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