Crystal structure of 9-hydroxyphenalenone: a very short intramolecular hydrogen bond system

1979 ◽  
Vol 101 (19) ◽  
pp. 5759-5764 ◽  
Author(s):  
C. Svensson ◽  
S. C. Abrahams ◽  
J. L. Bernstein ◽  
R. C. Haddon
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Intramolecular Hydrogen Bond ◽  
Hydrogen Bond System ◽  
Bond System ◽  
Intramolecular Hydrogen

1-{[5-Fluoro-2-(trifluoromethyl)phenyl]iminomethyl}-2-naphthol

2007 ◽  
Vol 63 (3) ◽  
pp. o1407-o1408
Author(s):  
Yun-Fa Zheng ◽  
Liang-Gui Wang ◽  
Guo-Bing Yan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Schiff Base ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Stacking Interactions ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Compound C ◽  
Intramolecular Hydrogen

The title compound, C18H11F4NO, a Schiff base, has been structurally characterized. One intramolecular hydrogen bond influences the conformation of the molecule. The crystal structure is extended into a one-dimensional chain along the c axis via π–π stacking interactions.

Regioselective N-Acetylation of 4-(2-Hydroxyphenyl)-2-phenyl-2,3- dihydro-1H-1,5-benzodiazepine Using Protection by an Intramolecular Hydrogen Bond

2009 ◽  
Vol 64 (8) ◽  
pp. 969-972 ◽  
Author(s):  
Carlos A. Escobar ◽  
Jorge Orellana-Vera ◽  
Andrés Vega ◽  
Dieter Sicker ◽  
Joachim Sieler
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Acetic Anhydride ◽  
Ambient Temperature ◽  
Intramolecular Hydrogen Bond ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Hydroxyl Groups ◽  
Acetyl Group ◽  
Intramolecular Hydrogen

Since the amino and the hydroxyl groups of 4-(2-hydroxyphenyl)-2-phenyl-2,3-dihydro-1H-1,5- benzodiazepine can both act as nucleophiles, the introduction of both an N-acetyl and an O-acetyl group is expected when the compound is allowed to react with an excess of an electrophile such as acetic anhydride. An intramolecular hydrogen bond between OH and N-5 of the benzodiazepine has been used to obtain differentiation between the two possible sites of acetylation. Thus, this feature offers a preparatively utilizable protecting effect for the OH group and allows for a regioselective N-acetylation at ambient temperature. Both mono- and diacetylated compounds were prepared and characterized by crystal structure analysis

scholarly journals Nickel alendronate

2012 ◽  
Vol 68 (6) ◽  
pp. m820-m821 ◽  
Author(s):  
Małgorzata Sikorska ◽  
Maria Gazda ◽  
Jaroslaw Chojnacki
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Intermolecular Hydrogen Bond ◽  
Hydrothermal Conditions ◽  
Complex Molecules ◽  
Hydrogen Bond System ◽  
Bond System

The title compound {systematic name: bis(μ2-dihydrogen 4-azaniumyl-1-hydroxybutane-1,1-diphosphonato)bis[aqua(dihydrogen 4-azaniumyl-1-hydroxybutane-1,1-diphosphonato)nickel(II)] dihydrate}, [Ni2(C4H12NO7P2)4(H2O)2]·2H2O, was synthesiized under hydrothermal conditions. Its structure is isotypic with the CoII analogue. The crystal structure is built up from centrosymmetric dinuclear complex molecules and the structure is reinforced by a net of intermolecular O—H...O and N—H...O hydrogen bonds. One water molecule is bound to the NiII atom in the octahedral coordination sphere, while the second is part of the intermolecular hydrogen-bond system.

scholarly journals Crystal structure of N-(diphenylphosphoryl)-2-methoxybenzamide

2019 ◽  
Vol 75 (7) ◽  
pp. 939-941
Author(s):  
Victor A. Trush ◽  
Nataliia S. Kariaka ◽  
Viktoriya V. Dyakonenko ◽  
Svitlana V. Shishkina ◽  
Vladimir M. Amirkhanov
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Metal Ions ◽  
Intermolecular Interactions ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Π Interactions ◽  
Compound C ◽  
Bidentate Chelate ◽  
Intramolecular Hydrogen

In the title compound, C20H18NO3P, the C=O and P=O groups of the carbacylamidophosphate (CAPh) fragments are located in a synclinal position relative to each other and are pre-organized for bidentate chelate coordination of metal ions. The N—H group is involved in the formation of an intramolecular hydrogen bond. In the crystal, molecules do not form strong intermolecular interactions but the molecules are linked via weak C—H...π interactions, forming chains along [001].

Ethyl 1-[5-amino-1-tert-butyl-3-(methylsulfanyl)-1H-pyrazole-4-carbonyl]-5-methyl-3-(methylsulfanyl)-1H-pyrazole-4-carboxylate

2006 ◽  
Vol 62 (5) ◽  
pp. o1679-o1681
Author(s):  
Jun-Fei Li ◽  
Hai-Bin Song ◽  
You-Quan Zhu ◽  
Hua-Zheng Yang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bond ◽  
Membered Ring ◽  
Intermolecular Hydrogen Bonds ◽  
Tert Butyl ◽  
The Family ◽  
Title Molecule ◽  
Intramolecular Hydrogen

The title molecule, C17H25N5O3S2, belongs to the family of bis-heterocycles. In the crystal structure, there are one intra- and two intermolecular hydrogen bonds. One of the two pyrazole rings and the six-membered ring formed by the intramolecular hydrogen bond are approximately coplanar.

Poly[μ-aqua-aqua-μ-3-carboxypyrazine-2-carboxylato-sodium(I)]

2006 ◽  
Vol 62 (5) ◽  
pp. m945-m947 ◽  
Author(s):  
Mustafa Tombul ◽  
Kutalmış Güven ◽  
Nazım Alkış
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Coordination Number ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Carboxyl Groups ◽  
Water Molecules ◽  
Dimeric Unit ◽  
Carboxylate Groups ◽  
Intramolecular Hydrogen

The crystal structure of the title compound, [Na(C6H3N2O4)(H2O)2] n , consists of molecular ribbons containing octahedral NaO5N units. Two adjacent Na atoms are bridged by two water molecules to give a centrosymmetric dimeric unit. Each Na centre is coordinated by two carboxylate groups. The ligand also uses one N atom to coordinate to Na. In addition, each Na atom is coordinated by one water O atom, raising the coordination number to six. One of the carboxyl groups retains its H atom, which takes part in an O—H...O [O...O = 2.563 (1) Å] intramolecular hydrogen bond.

Sign in / Sign up

Export Citation Format

Share Document