Results 21 to 30 of about 285,295 (266)
Acta Crystallographica Section E: Crystallographic Communications, 2015 The title compound, C30H48O2, contains a fused four-ring triterpenoid system. In the molecule, the two cyclohexane rings adopt a chair conformation and a twist boat conformation, respectively, the central cyclohexene ring adopts a half-chair conformation
Jun-Jun Ge, Pian Chen, Xiao-Xia Ye
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5,13-Bis(4-methoxyphenyl)dinaphtho[2,3-b:2′,3′-d]thiophene S,S-dioxide dichloromethane hemisolvate
IUCrData, 2019 The title compound, C34H24O4S·0.5CH2Cl2, crystallizes with two independent molecules and one dichloromethane solvent molecule in the asymmetric unit. The crystal packing is consolidated by C—H...O hydrogen bonds.
R. Manickam +4 more
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Acta 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
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Crystal structure of bis(diisopropylammonium) cis-diiodidobis(oxolato-κ2O1,O2)stannate(IV)
Acta Crystallographica Section E: Crystallographic Communications, 2018 In the title compound, (iPr2NH2)2[SnI2(C2O4)2], which was prepared by reacting (iPr2NH2+)2·C2O42− with SnI4 in a 2:1 molar ratio in a mixed ethanol–acetonitrile solvent, the Sn atom is coordinated by two chelating oxalate ions and two iodide ions, with ...
Bougar Sarr +3 more
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Diethyl 4-(1H-imidazol-2-yl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate
IUCrData, 2020 In the title compound, C16H21N3O4, the 1,4-dihydropyridine ring adopts a flattened boat conformation, with the imidazole substituent in an axial orientation [dihedral angle between ring planes = 82.9 (6)°].
Miri Yoo, Dongsoo Koh
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3,3'-Dibutanoyl-1,1'-(o-phenylene)dithiourea
, 2010 The molecular conformation of the title compound, C16H22N4O2S2, is stabilized by two intramolecular N—H ... O hydrogen bonds. The crystal packing shows N—H ... O and N—H ...
Bolte, Michael +7 more
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Crystal structure of 2-(4-acetylanilino)-2-oxoethyl 3-(4-hydroxyphenyl)propionate
Acta Crystallographica Section E: Crystallographic Communications, 2016 In the title compound, C19H19NO5, the amide carbonyl O atom is positioned anti to the other two carbonyl O atoms. The 4-hydroxyhydrocinnamate fragment is disordered over two positions with an occupancy ratio of 0.729 (12):0.271 (12).
Zaman Ashraf +3 more
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Analysis of O-H...O hydrogen bonds
, 1977 Some geometrical parameters associated with the donor and the acceptor end of O-H...O hydrogen bonds have been analysed. The data consist of 356 hydrogen bonds from reported crystal structures of amino acids, peptides and oligosaccharides.
Ramakrishnan, C., Mitra, Jayati
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Allylammonium hydrogen oxalate hemihydrate
Acta Crystallographica Section E, 2014 In the title hydrated molecular salt, C3H8N+·C2HO4−·0.5H2O, the water O atom lies on a crystallographic twofold axis. The C=C—C—N torsion angle in the cation is 2.8 (3)° and the dihedral angle between the CO2 and CO2H planes in the anion is 1.0 (4)°.
Błażej Dziuk +2 more
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3-(2-Methoxyphenyl)-2,3-dihydro-1H-benzo[f]chromen-1-one
IUCrData, 2020 In the title compound, C20H16O3, the 2-methoxyphenyl ring is tilted by 50.67 (3)° with respect to the naphthyl ring system. The central pyran ring has an envelope conformation with the C atom bearing the pendant ring system as the flap. The methoxy group
Jiha Sung
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