Results 71 to 80 of about 288,064 (168)

2-Amino-4-methylpyridin-1-ium 2-(4-nitrophenyl)acetate

IUCrData, 2016
In the title molecular salt, C6H9N2+·C8H6NO4−, the cation is protonated at its pyridine N atom. In the crystal, the anion and cation are connected by weak N—H...O hydrogen bonds, generating an R22(8) ring motif. A pair of N—H...O hydrogen bonds and a C—H.
P. Sivakumar, C. Anzline, S. Israel, G. Chakkaravarthi   +3 more
doaj   +1 more source

4,4'-Trimethylenedipyridinium bis[carboxymethylphosphonate(1-)]: a three-dimensional framework structure built from O-H...O, N-H...O and C-H...O hydrogen bonds [PDF]

, 2003
In the title compound, C13H16N22+.2C(2)H(4)O(5)P(-), the cation lies across a twofold rotation axis in space group Fdd2. The anions are linked into molecular ladders by two O-H...O hydrogen bonds [H...O = 1.73 and 1.77 Angstrom, O...O = 2.538 (2) and 2 ...
Bowes, K F, Bowes, KF, Ferguson, G, Glidewell, C, Lough, A J, Lough, AJ, Glidewell, Christopher   +6 more
core   +1 more source

Crystal structure of 4-{[(2,4-dihydroxybenzylidene)amino]methyl}cyclohexanecarboxylic acid

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C15H19NO4, the cyclohexyl ring adopts a chair conformation with both exocyclic C—C bonds in equatorial orientations. The dihedral angle between the basal plane of cyclohexyl ring and the 2,4-dihydroxybenzaldehyde moiety is 84.13 ...
Muhammad Danish, Saba Akbar, Muhammad Nawaz Tahir, Rabia Ayub Butt, Muhammad Ashfaq   +4 more
doaj   +1 more source

Ethyl 2-[(2E)-4-decyl-3-oxo-1,2,3,4-tetrahydroquinoxalin-2-ylidene]acetate

IUCrData, 2018
In the title compound, C22H32N2O3, the tetrahydroquinoxaline unit is planar. The ester substituent is nearly coplanar with this ring system as a result of an intramolecular N—H...O hydrogen bond.
Nadeem Abad, Youness El Bakri, Youssef Ramli, El Mokhtar Essassi, Joel T. Mague   +4 more
doaj   +1 more source

Cytenamide-butyric acid (1/1) [PDF]

, 2008
Cytenamide forms a 1:1 solvate with butyric acid [systematic name: 5H-dibenzo[a,d]cycloheptatriene-5-carboxamide-butanoic acid (1/1)], C16H13NO center dot C4H8O2.
Bedford, C. T., Fabbiani, F. J. A., Shankland, Kenneth, Florence, A. J., Florence, Alastair J., Bedford, Colin T., Fabbiani, F.J.A., Johnston, A., Florence, A.J., Fabbiani, Francesca P. A., Johnston, Andrea, Shankland, K., Bedford, C.T.   +12 more
core   +1 more source

Crystal structure of methyl (S)-2-{(R)-4-[(tert-butoxycarbonyl)amino]-3-oxo-1,2-thiazolidin-2-yl}-3-methylbutanoate: a chemical model for oxidized protein tyrosine phosphatase 1B (PTP1B)

Acta Crystallographica Section E: Crystallographic Communications, 2015
The asymmetric unit of the title compound, C14H24N2O5S, contains two independent molecules (A and B). In each molecule, the isothiazolidin-3-one ring adopts an envelope conformation with the methylene C atom as the flap.
Kasi Viswanatharaju Ruddraraju, Roman Hillebrand, Charles L. Barnes, Kent S. Gates   +3 more
doaj   +1 more source

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
doaj   +1 more source

Weak becomes strong: remarkable strength of C–H⋯π hydrogen bond in the presence of O–H⋯O hydrogen bonds in the crystal stabilization [PDF]

, 2013
We report crystallographic evidence for the significance of C–H⋯π hydrogen bonds in the crystal stabilization of 1,4-di-O-benzoyl-myo-inositol.
Sureshan, Kana M., Gonnade, Rajesh G.
core   +1 more source

Urea-Catalyzed Functionalization of Unactivated C–H Bonds [PDF]

, 2020
Herein we report the 3,5bistrifluoromethylphenyl urea-catalyzed functionalization of unactivated C–H bonds. In this system, the urea catalyst mediates the formation of high-energy vinyl carbocations that undergo facile C–H insertion and Friedel–Crafts ...
Benjamin, Wigman, Alex L. Bagdasarian (6075210), Hosea, Nelson, Stasik Popov (6075209), Alex L., Bagdasarian, Benjamin Wigman (6075208), Stasik, Popov, Wenjing, Wei, Hosea Nelson (5860601), woojin lee (8480169), Wenjing Wei (8480141), woojin, lee   +11 more
core   +1 more source

1,2-Ethylenediaminium bis(2-benzamidobenzoate)

Acta Crystallographica Section E, 2013
In the title salt, C2H10N22+·2C14H10NO3−, the ethylenediaminium dication lies on an inversion centre. In the anion, the benzene rings make a dihedral angle of 33.87 (9)° and intramolecular N—H...O and C—H...O hydrogen ...
Mavlonbek Ziyaev, Jamshid Ashurov, Samat Talipov, Bakhtiyar Ibragimov   +3 more
doaj   +1 more source