1H NMR Detection of Immobilized Water Molecules within a Strong Distal Hydrogen-Bonding Network of Substrate-Bound Human Heme Oxygenase-1

2002 ◽  
Vol 124 (48) ◽  
pp. 14296-14297 ◽  
Author(s):  
Ray T. Syvitski ◽  
Yiming Li ◽  
Karine Auclair ◽  
Paul R. Ortiz de Montellano ◽  
Gerd N. La Mar
Keyword(s):  
Hydrogen Bonding ◽  
1H Nmr ◽  
Heme Oxygenase ◽  
Heme Oxygenase 1 ◽  
Water Molecules ◽  
Hydrogen Bonding Network

scholarly journals Alteration of the Regiospecificity of Human Heme Oxygenase-1 by Unseating of the Heme but Not Disruption of the Distal Hydrogen Bonding Network†

Biochemistry ◽  
2006 ◽  
Vol 45 (1) ◽  
pp. 61-73 ◽  
Author(s):  
Jinling Wang ◽  
John P. Evans ◽  
Hiroshi Ogura ◽  
Gerd N. La Mar ◽  
Paul R. Ortiz de Montellano
Keyword(s):  
Hydrogen Bonding ◽  
Heme Oxygenase ◽  
Heme Oxygenase 1 ◽  
Hydrogen Bonding Network

A 16-connected three-dimensional hydrogen-bonding network in tetrakis(4-aminopyridinium) perylene-3,4,9,10-tetracarboxylate octahydrate

2014 ◽  
Vol 70 (7) ◽  
pp. 668-671 ◽  
Author(s):  
Zhi-Hui Zhang ◽  
Jin-Long Wang ◽  
Ning Gao ◽  
Ming-Yang He
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Linear Chain ◽  
Three Dimensional ◽  
Organic Salt ◽  
Water Molecules ◽  
The Novel ◽  
One Dimensional ◽  
Connected Node ◽  
Hydrogen Bonding Network

The novel title organic salt, 4C5H7N2+·C24H8O84−·8H2O, was obtained from the reaction of perylene-3,4,9,10-tetracarboxylic acid (H4ptca) with 4-aminopyridine (4-ap). The asymmetric unit contains half a perylene-3,4,9,10-tetracarboxylate (ptca4−) anion with twofold symmetry, two 4-aminopyridinium (4-Hap+) cations and four water molecules. Strong N—H...O hydrogen bonds connect each ptca4−anion with four 4-Hap+cations to form a one-dimensional linear chain along the [010] direction, decorated by additional 4-Hap+cations attached by weak N—H...O hydrogen bonds to the ptca4−anions. Intermolecular O—H...O interactions of water molecules with ptca4−and 4-Hap+ions complete the three-dimensional hydrogen-bonding network. From the viewpoint of topology, each ptca4−anion acts as a 16-connected node by hydrogen bonding to six 4-Hap+cations and ten water molecules to yield a highly connected hydrogen-bonding framework. π–π interactions between 4-Hap+cations, and between 4-Hap+cations and ptca4−anions, further stabilize the three-dimensional hydrogen-bonding network.

scholarly journals Two-dimensional interlocked pentagonal bilayer ice: how do water molecules form a hydrogen bonding network?

2016 ◽  
Vol 18 (21) ◽  
pp. 14216-14221 ◽  
Author(s):  
Weiduo Zhu ◽  
Wen-Hui Zhao ◽  
Lu Wang ◽  
Di Yin ◽  
Min Jia ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Water Molecules ◽  
Two Dimensional ◽  
Rich Phase ◽  
Nanoconfined Water ◽  
Hydrogen Bonding Network ◽  
The Rich ◽  
Phase Behaviors

The tradeoff between the conditions of an ideal hydrogen bonding network can serve as a generic guidance to understand the rich phase behaviors of nanoconfined water.

Octaammonium diaquahexa-μ2-oxalato-dioxalatotetracopper(II) tetrahydrate

2006 ◽  
Vol 62 (5) ◽  
pp. m1139-m1141 ◽  
Author(s):  
Karim Kadir ◽  
Trifa Mohammad Ahmed ◽  
Dag Noreús ◽  
Lars Eriksson
Keyword(s):  
Hydrogen Bonding ◽  
Water Molecule ◽  
Title Compound ◽  
Water Molecules ◽  
Ammonium Ions ◽  
Solvent Water ◽  
Oxalate Ligand ◽  
Hydrogen Bonding Network

In the structure of the title compound, (NH4)8[Cu4(C2O4)8(H2O)2]·4H2O, isolated tetramers of [Cu(ox)2]2+ (ox is oxalate) are present. Each CuII ion coordinates to four O atoms in two oxalate ligands and to two more distant O atoms in a neighbouring oxalate ligand or a water molecule. An extensive hydrogen-bonding network connects the tetramers to two unique solvent water molecules and four ammonium ions.

A dense hydrogen-bonding network and an unusually large packing index in triaquatris(2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylato)neodymium(III) trihydrate

2013 ◽  
Vol 69 (11) ◽  
pp. 1378-1382
Author(s):  
Ana María Atria ◽  
Maria Teresa Garland ◽  
Ricardo Baggio
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Polyhedron ◽  
Complex Molecule ◽  
Mononuclear Complex ◽  
Water Molecules ◽  
Neutral Complex ◽  
Carboxylate Ligands ◽  
Solvent Water ◽  
Hydrogen Bonding Network

The title mononuclear complex, [Nd(C5H3N2O3)3(H2O)3]·3H2O, consists of an NdIIIcation, three 2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate ligands and three aqua ligands forming the neutral complex molecule, and three solvent water molecules. The pyrimidinecarboxylate ligands act in a chelating manner,viacarboxylate and keto O atoms. The NdO9coordination polyhedron is in the form of a distorted monocapped square antiprism. The availability of numerous hydrogen-bonding donors and acceptors results in a very dense hydrogen-bonding network, the immediate effect of which is an unusually large packing index.

Bis(adeninium) chloranilate dihydrate

2007 ◽  
Vol 63 (11) ◽  
pp. o4433-o4433 ◽  
Author(s):  
Kazuma Gotoh ◽  
Rie Ishikawa ◽  
Hiroyuki Ishida
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Three Dimensional ◽  
Water Molecules ◽  
Hydrogen Bonding Network

In the crystal structure of the title compound, 2C5H6N5 +·C6Cl2O4 2−·2H2O, two adeninium cations, one chloranilate dianion and two water molecules are held together by O—H...O, N—H...O, O—H...Cl and C—H...O hydrogen bonds, forming a centrosymmetric unit. The chloranilate dianion resides on an inversion centre. The anion and two cations are approximately coplanar, the dihedral angle between the planes of the adeninium cation and the chloranilate dianion being 3.25 (3)°. The crystal structure is stabilized by inter-unit N—H...N, N—H...O, N—H...Cl and O—H...N hydrogen bonds, forming a three-dimensional hydrogen-bonding network.

1H NMR studies on the hydrogen-bonding network in mono-altro-β-cyclodextrin and its complex with adamantane-1-carboxylic acid

2005 ◽  
Vol 340 (8) ◽  
pp. 1539-1545 ◽  
Author(s):  
Birgit Hakkarainen ◽  
Kahee Fujita ◽  
Stefan Immel ◽  
Lennart Kenne ◽  
Corine Sandström
Keyword(s):  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
1H Nmr ◽  
Nmr Studies ◽  
Hydrogen Bonding Network
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