The impact on the ring related vibrational frequencies of pyridine of hydrogen bonds with haloforms – a topology perspective

2019 ◽  
Vol 21 (4) ◽  
pp. 1724-1736 ◽  
Author(s):  
Enrico Benassi ◽  
Kamila Akhmetova ◽  
Haiyan Fan
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Ring Structure ◽  
Vibrational Frequencies ◽  
Bonding System ◽  
Hydrogen Bonding System ◽  
The Impact

An intermolecular ring structure is identified for the hydrogen bonding system of pyridine and haloforms.

scholarly journals The effect of hydrogen bonding on the conformations of 2-(1H-indol-3-yl)-2-oxoacetamide and 2-(1H-indol-3-yl)-N,N-dimethyl-2-oxoacetamide

2012 ◽  
Vol 68 (10) ◽  
pp. o405-o407 ◽  
Author(s):  
Vijayakumar N. Sonar ◽  
Sean Parkin ◽  
Peter A. Crooks
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Carbonyl Groups ◽  
Single Bond ◽  
Torsion Angles ◽  
Bonding System ◽  
Dimensional Network ◽  
Hydrogen Bonding System

In the title compounds, C10H8N2O2, (I), and C12H12N2O2, (II), the two carbonyl groups are oriented with torsion angles of −149.3 (3) and −88.55 (15)°, respectively. The single-bond distances linking the two carbonyl groups are 1.528 (4) and 1.5298 (17) Å, respectively. In (I), the molecules are linked by an elaborate system of N—H...O hydrogen bonds, which form adjacentR22(8) andR42(8) ring motifs to generate a ladder-like construct. Adjacent ladders are further linked by N—H...O hydrogen bonds to build a three-dimensional network. The hydrogen bonding in (II) is far simpler, consisting of helical chains of N—H...O-linked molecules that follow the 21screw of thebaxis. It is the presence of an elaborate hydrogen-bonding system in the crystal structure of (I) that leads to the different torsion angle for the orientation of the two adjacent carbonyl groups from that in (II).

scholarly journals The crystal structures of benzylammonium phenylacetate and its hydrate

2019 ◽  
Vol 75 (2) ◽  
pp. 194-201
Author(s):  
David Hess ◽  
Peter Mayer
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Phenylacetic Acid ◽  
Two Dimensional ◽  
Aromatic Rings ◽  
Crystal Water ◽  
Bonding System ◽  
Hydrogen Bonding System

The title compounds benzylammonium phenylacetate, C7H10N+·C8H7O2 − (1), and its monohydrate, C7H10N+·C8H7O2 −·H2O (2), can be obtained by evaporating methanolic solutions containing equimolar amounts of benzylamine and phenylacetic acid in the absence and presence of water, respectively. N—H...O hydrogen bonds in the crystal structure of 1 lead to the formation of hydrophilic channels running along the b-axis direction. The hydrogen-bonding system is best described by fused R 3 4(10) ring patterns, often observed in ammonium carboxylate salts. In 2, the presence of the crystal water leads to the formation of a two-dimensional hydrogen-bonding network. The benzyl moieties in 1 and 2 form hydrophobic layers in the crystal structures with the aromatic rings adopting edge-to-face arrangements.

Hexamethylenediammonium bis(saccharinate): supramolecular assembly via hydrogen bonds

2006 ◽  
Vol 62 (4) ◽  
pp. o1314-o1316
Author(s):  
Zi-Liang Wang ◽  
Lin-Heng Wei ◽  
Ming-Xue Li ◽  
Jing-Yang Niu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Supramolecular Assembly ◽  
Special Position ◽  
Bonding System ◽  
Hydrogen Bonding System ◽  
Anions And Cations

The crystal structure of the title salt, C6H18N2 2+·2C7H4NO3S−, contains two crystallographically independent hexamethylenediammonium dications and two independent saccharinate anions; each of the dications occupies a special position on an inversion centre. The extensive hydrogen-bonding system, involving all six `active' H atoms, links the anions and cations into an infinite three-dimensional supramolecular assembly.

HYDROGEN BONDING CHARACTERISTICS OF CRYSTALLINE WATER IN INORGANIC CRYSTALS

2009 ◽  
Vol 23 (31n32) ◽  
pp. 3959-3966 ◽  
Author(s):  
FANGFANG ZHANG ◽  
KEYAN LI ◽  
DONGFENG XUE
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Metal Cations ◽  
Bond Lengths ◽  
Bonding System ◽  
Crystalline Environment ◽  
Hydrogen Bonding System ◽  
Crystalline Water ◽  
Crystal Design ◽  
Average Bond

From the chemical bond viewpoint, the microscopic characterstatics of hydrogen bonds in M i— OH 2⋯ O ( M is the metal cation coordinated to water molecule and i is the number of M ) systems were comprehensively studied. It is shown that the original O — OH and H ⋯ O bond lengths of each hydrogen bonding system are evidently influenced by the crystalline environment and strongly dependent on the corresponding average bond lengths of each system, [Formula: see text] and [Formula: see text]. Furthermore, the hydrogen bonding capability of water molecules coordinated to various metal cations was properly estimated and found to be related to the ionic electronegativities of these metal cations. The current work provides a useful route to calculating hydrogen bond valences within reasonable accuracy and sheds light on the rational utilization of hydrogen bonds in crystal design.

Ethylenediammonium thiophene-2,5-dicarboxylate dihydrate, an acid–base complex with a three-dimensional hydrogen-bonding system

2006 ◽  
Vol 62 (7) ◽  
pp. o2951-o2952 ◽  
Author(s):  
Si-Min Wu ◽  
Ming Li ◽  
Jiang-Feng Xiang ◽  
Liang-Jie Yuan ◽  
Ju-Tang Sun
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Water Molecules ◽  
Inversion Center ◽  
Acid Base ◽  
Special Position ◽  
Compound C ◽  
Bonding System ◽  
Hydrogen Bonding System

The crystal structure of the title compound, C2H10N2 2+·C6H2O4S2−·2H2O, is built of ethylenediammonium dications, occupying a special position on an inversion center, thiophene-2,5-dicarboxylate dianions, in a special position on the twofold axis, and water molecules in general positions. All residues are involved in an extensive hydrogen-bonding system, which links them into a three-dimensional supramolecular arrangement.

Structure of Hydrated Copper(II) Colchiceine

1999 ◽  
Vol 52 (4) ◽  
pp. 333 ◽  
Author(s):  
Maureen F. Mackay ◽  
Robert W. Gable ◽  
James D. Morrison ◽  
Lothar O. Satzke
Keyword(s):  
Hydrogen Bonding ◽  
Copper Atom ◽  
Three Dimensional ◽  
Water Molecules ◽  
R Factor ◽  
Bonding System ◽  
Dimensional Network ◽  
Square Planar ◽  
Hydrogen Bonding System ◽  
C 50

Hydrated crystals of copper(II) colchiceine belong to the tetragonal space group P 432I2 with a 13·415(1), c 50·169(8) Å and Z 8. The structure has been refined to a conventional R factor of 0·077 for 4560 observed data. The tropolonic oxygens from two colchiceine molecules are coordinated to the copper atom in this bis-chelated complex to form a square planar arrangement. The sites of three of the waters are clearly defined, but the others are disordered over seven partially occupied sites. An intricate hydrogen-bonding system links the complex and water molecules into a three-dimensional network in the crystal.

Crystal Structure and Hydrogen-Bonding System in Cellulose Iβ from Synchrotron X-ray and Neutron Fiber Diffraction

2002 ◽  
Vol 124 (31) ◽  
pp. 9074-9082 ◽  
Author(s):  
Yoshiharu Nishiyama ◽  
Paul Langan ◽  
Henri Chanzy
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
X Ray ◽  
Bonding System ◽  
Fiber Diffraction ◽  
Cellulose Iβ ◽  
Hydrogen Bonding System

A correlation study between hydrogen-bonded network and gelation ability of three galactose derivatives

CrystEngComm ◽  
2015 ◽  
Vol 17 (17) ◽  
pp. 3345-3353 ◽  
Author(s):  
Somnath Mukherjee ◽  
G. Rama Krishna ◽  
Balaram Mukhopadhyay ◽  
C. Malla Reddy
Keyword(s):  
Hydrogen Bonding ◽  
Correlation Study ◽  
Bonding System ◽  
Hydrogen Bonding System ◽  
Hydrogen Bonding Network ◽  
Hydrogen Bonded

The hydrogen bonding network in the crystals of the three saccharides was correlated with their gelling ability or inability, and unexpectedly, a 2D hydrogen-bonded system was found to show efficient gelation, whereas a 1D hydrogen bonding system was a nongelator.

On the Characterization of Dynamic Supramolecular Systems: A General Mathematical Association Model for Linear Supramolecular Copolymers and Application on a Complex Two-Component Hydrogen-Bonding System

2007 ◽  
Vol 13 (34) ◽  
pp. 9617-9636 ◽  
Author(s):  
Fabrice G. J. Odille ◽  
Stefán Jónsson ◽  
Susann Stjernqvist ◽  
Tobias Rydén ◽  
Kenneth Wärnmark
Keyword(s):  
Hydrogen Bonding ◽  
Supramolecular Systems ◽  
Association Model ◽  
Mathematical Association ◽  
Bonding System ◽  
Two Component ◽  
Hydrogen Bonding System
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