Hydrogen-bond forming ionophore for highly efficient transport of phosphate anions across the nitrobenzene–water interface

The Analyst ◽  
2003 ◽  
Vol 128 (6) ◽  
pp. 663-669 ◽  
Author(s):  
Seiichi Nishizawa ◽  
Tomoyuki Yokobori ◽  
Ryo Kato ◽  
Keitaro Yoshimoto ◽  
Tomoyuki Kamaishi ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Water Interface ◽  
Bond Forming ◽  
Highly Efficient ◽  
Phosphate Anions ◽  
Efficient Transport

Rietveld refinement of the cocrystal 2,4-dihydroxybenzoic acid–N′-(propan-2-ylidene)nicotinohydrazide (1/1)

2012 ◽  
Vol 68 (9) ◽  
pp. o335-o337 ◽  
Author(s):  
Saul H. Lapidus ◽  
Andreas Lemmerer ◽  
Joel Bernstein ◽  
Peter W. Stephens
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Powder Diffraction ◽  
Supramolecular Assembly ◽  
Covalent Bond ◽  
Analytical Tool ◽  
Powder Diffraction Data ◽  
Dihydroxybenzoic Acid ◽  
Bond Forming ◽  
Hydrogen Bond Interactions

A further example of using a covalent-bond-forming reaction to alter supramolecular assembly by modification of hydrogen-bonding possibilities is presented. This concept was introduced by Lemmerer, Bernstein & Kahlenberg [CrystEngComm(2011),13, 55–59]. The title structure, C9H11N3O·C7H6O4, which consists of a reacted niazid molecule,viz.N′-(propan-2-ylidene)nicotinohydrazide, and 2,4-dihydroxybenzoic acid, was solved from powder diffraction data using simulated annealing. The results further demonstrate the relevance and utility of powder diffraction as an analytical tool in the study of cocrystals and their hydrogen-bond interactions.

scholarly journals Nucleobase recognition by hydrogen bond forming ligands and its use for fluorescence detection of single-nucleotide polymorphisms

2004 ◽  
Vol 53 (5) ◽  
pp. 383-391 ◽  
Author(s):  
Seiichi NISHIZAWA ◽  
Keitaro YOSHIMOTO ◽  
Takehiro SEINO ◽  
Chun-Yan XU ◽  
Norio TERAMAE
Keyword(s):  
Hydrogen Bond ◽  
Single Nucleotide Polymorphisms ◽  
Fluorescence Detection ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Bond Forming

scholarly journals Crystal structure of 1-benzyl-4-formyl-1H-pyrrole-3-carboxamide

2016 ◽  
Vol 72 (2) ◽  
pp. 133-135
Author(s):  
Qi-Di Zhong ◽  
Sheng-Quan Hu ◽  
Hong Yan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Π Interactions ◽  
Bond Forming ◽  
Compound C ◽  
The Mean ◽  
Ring Motif

In the title compound, C13H12N2O2(I), the mean planes of the pyrrole and benzyl rings are approximately perpendicular, forming a dihedral angle of 87.07 (4) °. There is an intramolecular N—H...O hydrogen bond forming an S(7) ring motif. In the crystal, molecules are linkedviaa pair of N—H...O hydrogen bonds forming inversion dimers. C—H...O hydrogen bonds link the dimers into chains along direction [10-1]. The chains are further linked by weak C—H...π interactions forming layers parallel to theacplane.

scholarly journals 4-Chloro-5-(morpholin-4-yl)-2-[(5-phenyl-1,3,4-oxadiazol-2-yl)methyl]pyridazin-3(2H)-one

IUCrData ◽  
2017 ◽  
Vol 2 (3) ◽  
Author(s):  
Yanwen Sun ◽  
Haolei Wu ◽  
Changheng Wei ◽  
Mei Gao ◽  
Zeyi Shen ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Dihedral Angles ◽  
Bond Forming ◽  
Compound C ◽  
Pyridazine Ring ◽  
Morpholine Ring

In the title compound, C17H16ClN5O3, the phenyl and the oxadiazole rings are almost coplanar, subtending a dihedral angle of 4.34 (19)°. These rings lie almost normal to the pyridazine ring, making dihedral angles of 87.35 (16) and 89.06 (15)°, respectively. The morpholine ring has the usual chair conformation and its mean plane is inclined to the pyridazine ring by 39.45 (17)°. There is a short intramolecular C—H...Cl contact present. In the crystal, molecules are linked by bifurcated C—(H,H)...O hydrogen bonds and a C—H...N hydrogen bond, forming layers parallel to the ab plane.

scholarly journals Crystal structure of 4-bromo-2-(1H-imidazo[4,5-b]pyridin-2-yl)phenol

2015 ◽  
Vol 71 (12) ◽  
pp. o991-o992
Author(s):  
Kamel Ouari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Bond Forming ◽  
Pyridine Moiety ◽  
Compound C ◽  
Centroid Distance ◽  
Ring Motif

In the title compound, C12H8BrN3O, the 4-bromophenol ring is coplanar with the planar imidazo[4,5-b]pyridine moiety (r.m.s deviation = 0.015 Å), making a dihedral angle of 1.8 (2)°. There is an intramolecular O—H...N hydrogen bond forming anS(6) ring motif. In the crystal, molecules are linkedviaN—H...N and O—H...Br hydrogen bonds, forming undulating sheets parallel to (10-2). The sheets are linked by π–π interactions [inter-centroid distance = 3.7680 (17) Å], involving inversion-related molecules, forming a three-dimensional structure.

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