scholarly journals 4′-[2-(2-Ethoxyethoxy)ethoxy]biphenyl-4-carboxylic acid: correlation between its crystalline and smectic phases

2009 ◽  
Vol 65 (3) ◽  
pp. o81-o84 ◽  
Author(s):  
Rosana S. Montani ◽  
Raúl O. Garay ◽  
Fabio D. Cukiernik ◽  
Maria T. Garland ◽  
Ricardo Baggio
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
Title Compound ◽  
Carboxyl Groups ◽  
Hydrogen Bonding Interaction ◽  
Compound C ◽  
Smectic Phases ◽  
Bonding Interaction ◽  
Smectic Mesophase

The crystal structure of the dimeric title compound, C19H22O5, is dominated by a head-to-head hydrogen-bonding interaction between centrosymmetrically related carboxyl groups in each monomer. The result is a dimeric axis of unusual length (ca34 Å), but still shorter than what could be expected for a fully extended chain, owing to two turning points in the oligoethoxy ends. This allows for an explanation of the structure of the smectic mesophase exhibited by this compound and at the same time fully validates former geometric estimations based on PM3 calculations.

scholarly journals 2-[(E)-(2-Aminophenyl)iminomethyl]-5-(dimethylamino)phenol

2009 ◽  
Vol 65 (6) ◽  
pp. o1232-o1232
Author(s):  
Yan-Hong Yu ◽  
Kun Qian
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Double Bond ◽  
Dihedral Angle ◽  
Title Compound ◽  
Hydrogen Bonding Interaction ◽  
Compound C ◽  
Bonding Interaction ◽  
Benzene Rings

The molecule of the title compound, C17H21N3O, displays atransconfiguration with respect to the C=N double bond. The dihedral angle between the planes of the two benzene rings is 50.96 (11)° and a strong intramolecular O—H...N hydrogen bond is present. An intermolecular N—H...O hydrogen-bonding interaction stabilizes the crystal structure.

scholarly journals Crystal structure of 4-methyl-N-{[1-(4-methylbenzoyl)piperidin-4-yl]methyl}benzamide

2014 ◽  
Vol 70 (11) ◽  
pp. o1157-o1157
Author(s):  
K. Prathebha ◽  
D. Reuben Jonathan ◽  
S. Sathya ◽  
R. Vasanthi ◽  
G. Usha
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Piperidine Ring ◽  
Hydrogen Bonding Interaction ◽  
Compound C ◽  
Bonding Interaction ◽  
Benzene Rings

In the title compound, C22H27N2O2, the piperidine ring adopts a half-chair conformation with the benzene rings inclined in atransorientation with respect to the piperidine ring [dihedral angle between the benzene rings = 89.1 (1)°]. In the crystal, a three-centre asymmetric N—H...O/C—H...O hydrogen-bonding interaction leads to the formation of chains extending along thea-axis direction.

scholarly journals 1-(4-tert-Butylbenzyl)-3-phenyl-1H-pyrazole-5-carboxylic acid

2009 ◽  
Vol 65 (6) ◽  
pp. o1273-o1273 ◽  
Author(s):  
Zheng Tang ◽  
Xiao-Ling Ding ◽  
Yong-Sheng Xie ◽  
Bao-Xiang Zhao
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
Title Compound ◽  
Pyrazole Ring ◽  
Dihedral Angles ◽  
Carboxylate Group ◽  
Compound C ◽  
The Mean ◽  
Centrosymmetric Dimers

In the title compound, C21H22N2O2, the mean plane of the pyrazole ring makes dihedral angles of 18.80 (12) and 77.13 (5)°, respectively, with the mean planes of the phenyl andtert-butylbenzyl rings. The carboxylate group is inclined at 8.51 (14)° with respect to the pyrazole ring. The crystal structure displays intermolecular O—H...O hydrogen bonding, generating centrosymmetric dimers.

scholarly journals (Z)-2-(5-Chloro-2-oxoindolin-3-ylidene)-N-methylhydrazinecarbothioamide

2012 ◽  
Vol 68 (4) ◽  
pp. o964-o965 ◽  
Author(s):  
Amna Qasem Ali ◽  
Naser Eltaher Eltayeb ◽  
Siang Guan Teoh ◽  
Abdussalam Salhin ◽  
Hoong-Kun Fun
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Hydrogen Bonding Interaction ◽  
Compound C ◽  
Hydrogen Bonding Interactions ◽  
Dimensional Network ◽  
Bonding Interaction ◽  
A Chain ◽  
Graph Sets

In the title compound, C10H9ClN4OS, an intramolecular N—H...O hydrogen-bonding interaction and an N—H...N interaction generate ring motifs [graph setsS(6) andS(5), respectively]. In the crystal, molecules form a chain through N—H...O hydrogen bonds, and these are extended by N—H...S hydrogen-bonding interactions into an infinite three-dimensional network. The crystal structure also exhibits weak C—H...π interactions.

scholarly journals Crystal structure of 4-{[(naphthalen-2-yl)sulfonylamino]methyl}cyclohexanecarboxylic acid

2015 ◽  
Vol 71 (3) ◽  
pp. o145-o145 ◽  
Author(s):  
Muhammad Danish ◽  
Muhammad Nawaz Tahir ◽  
Asif Hussain ◽  
Muhammad Ashfaq ◽  
Muhammad Nadeem Sadiq
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
Hydrogen Bonds ◽  
Tranexamic Acid ◽  
Title Compound ◽  
Π Interactions ◽  
Carboxylic Acid Groups ◽  
Compound C ◽  
Thick Layers

The title compound, C18H21NO4S, is a new sulfonamide derivative of tranexamic acid. In the crystal, molecules form inversion dimersviaO—H...O hydrogen bonds involving the carboxylic acid groups. Hydrogen bonding between the sulfonamide N—H group and the carboxylic acid O atom assembles the dimers into thick layers parallel to (100). The naphthalene groups of adjacent layers are arranged in a herring-bone motif. There are C—H...π interactions between the naphthalene rings of neighbouring layers.

8-(2-Phenylethylamino)quinoline

2000 ◽  
Vol 57 (1) ◽  
pp. o4-o5
Author(s):  
Daniel E. Lynch ◽  
Ian McClenaghan
Keyword(s):  
Hydrogen Bonding ◽  
Dihedral Angle ◽  
Title Compound ◽  
Hydrogen Bonding Interaction ◽  
Ring Systems ◽  
Compound C ◽  
Bonding Interaction

The structure of the title compound, C17H16N2, (I), comprises twisted molecules that contain a single intramolecular N—H...N hydrogen-bonding interaction. The dihedral angle between the two ring systems is 65.72 (4)°.

Synthesis and Crystal Structure of N-[(15,4R)-2-Oxo-pinanyl]-β-alanine Methylester

1998 ◽  
Vol 53 (10) ◽  
pp. 1188-1190 ◽  
Author(s):  
Barbara Albert ◽  
Martin Jansen ◽  
Jörg Jakobi ◽  
Eberhard Steckhan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Amino Acid ◽  
Title Compound ◽  
Amino Acid Derivatives ◽  
Hydrogen Bonding Interaction ◽  
Electrochemical Preparation ◽  
Synthesis And Crystal Structure ◽  
Bonding Interaction ◽  
Amine Function

AbstractThe title compound, N-[(lS,4R)-2-oxo-pinanyl]-β-alanine methylester, is an important starting material for the electrochemical preparation of chiral amidoalkylation reagents in the synthesis of chiral β-substituted β-amino acid derivatives. The investigation of its crystal structure reveals an arrangement of the carbonyl group and the amine function, which is influenced by a hydrogen bonding interaction. This conformation makes the molecule especially appropriate for further synthetical modification

4,6-Dibenzoylisophthalic acid dimethyl sulfoxide disolvate

2006 ◽  
Vol 62 (7) ◽  
pp. o2697-o2699
Author(s):  
Shan Liu ◽  
Guang-Liang Song ◽  
Jun-Mei Tang ◽  
Wen-Kai Xu ◽  
Hong-Jun Zhu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Dimethyl Sulfoxide ◽  
Title Compound ◽  
Carboxyl Groups ◽  
Compound C

In the crystal structure of the title compound, C22H14O6··2C2H6OS, 4,6-dibenzoylisophthalic acid is connected to two dimethyl sulfoxide molecules by strong O—H...O=S hydrogen bonds. Weak intermolecular C—H...O hydrogen bonds connect molecules into dimers. Intramolecular three-centred C—H...O hydrogen bonding is favoured by a syn conformation of both carboxyl groups. The two dimethyl sulfoxide molecules were found to be disordered over two equally populated sites.

scholarly journals The β-form of trans-3-(2-nitrophenyl)prop-2-enoic acid at 130 K

2006 ◽  
Vol 62 (5) ◽  
pp. o2024-o2026 ◽  
Author(s):  
Graham Smith ◽  
Urs D. Wermuth ◽  
David J. Young ◽  
Jonathan M. White
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
Title Compound ◽  
Enoic Acid ◽  
Polymorphic Modification ◽  
One Dimensional ◽  
Compound C

The crystal structure of a non-centrosymmetric polymorphic modification of the title compound, C9H7NO4, determined at 130 K, shows the presence of 21 screw-generated one-dimensional zigzag chains formed through catemeric C(4) syn–anti carboxylic acid hydrogen-bonding associations.

(1S,3R,6S,7R)-3,7-Dichloro-trans-himachalane

2007 ◽  
Vol 63 (3) ◽  
pp. o1497-o1499 ◽  
Author(s):  
Najia Ourhriss ◽  
Noureddine Mazoir ◽  
Jean-Claude Daran ◽  
Moha Berraho ◽  
Ahmed Benharref
Keyword(s):  
Hydrogen Bonding ◽  
Title Compound ◽  
Chair Conformation ◽  
Membered Ring ◽  
Hydrogen Bonding Interaction ◽  
Compound C ◽  
Bonding Interaction ◽  
A Chain

The molecule of the title compound, C15H26Cl2, is built up from two fused six-membered and seven-membered rings. The six-membered ring has a perfect chair conformation, whereas the seven-membered ring displays a twist-chair conformation. A weak C—H...Cl hydrogen-bonding interaction links the molecule into a chain parallel to the a axis.

Sign in / Sign up

Export Citation Format

Share Document