scholarly journals A structural, spectroscopic and theoretical study of an o-vanillin Schiff base derivative involved in enol-imine and keto-amine tautomerism

2016 ◽  
Vol 40 (3) ◽  
pp. 2730-2740 ◽  
Author(s):  
Reinaldo Pis-Diez ◽  
Gustavo A. Echeverría ◽  
Oscar E. Piro ◽  
Jorge L. Jios ◽  
Beatriz S. Parajón-Costa
Keyword(s):  
Schiff Base ◽  
Hydrogen Bonds ◽  
Potassium Salt ◽  
Theoretical Study ◽  
Intramolecular Hydrogen Bonds ◽  
Tautomeric Forms ◽  
Base Derivative ◽  
Intramolecular Hydrogen

The potassium salt of the Schiff base derived from o-vanillin and taurine is involved in enol-imine (I) and keto-amine (II) tautomerism. Both tautomeric forms coexist in the crystal and they are stabilized by strong O–H⋯N and O⋯H–N intramolecular hydrogen bonds.

Hydrogen bonds in derivatives of N-substituted N’-benzoyl- and N’-(2-chlorobenzoyl)thiourea

1991 ◽  
Vol 56 (4) ◽  
pp. 880-885 ◽  
Author(s):  
Oľga Hritzová ◽  
Dušan Koščík
Keyword(s):  
Hydrogen Bonds ◽  
Spectral Studies ◽  
Intramolecular Hydrogen Bonds ◽  
Tautomeric Forms ◽  
Intramolecular Hydrogen ◽  
Derivatives Of

Intramolecular hydrogen bonds of the N-H···O=C type have been detected in the derivatives of N-substituted N’-benzoyl- and N’-(2-chlorobenzoyl)thiourea on the basis of IR spectral studies. The title compounds can exist in two tautomeric forms.

Theoretical study of the substituent effect on the intramolecular hydrogen bonds in di(4-hydroxycoumarin) derivatives

2006 ◽  
Vol 106 (6) ◽  
pp. 1304-1315 ◽  
Author(s):  
Tzvetan Mihaylov ◽  
Ivelina Georgieva ◽  
Günther Bauer ◽  
Irena Kostova ◽  
Ilia Manolov ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Substituent Effect ◽  
Theoretical Study ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

A Schiff-base porphyrin complex with double intramolecular hydrogen bonds

2011 ◽  
Vol 64 (12) ◽  
pp. 2101-2109 ◽  
Author(s):  
Wei Huang ◽  
Jiaxun Jiang ◽  
Zhiqiang Feng ◽  
Xiaoxu Kai ◽  
Chuanjiang Hu ◽  
...  
Keyword(s):  
Schiff Base ◽  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bonds ◽  
Porphyrin Complex ◽  
Intramolecular Hydrogen

Theoretical Study of the Competition between Intramolecular Hydrogen Bonds and Solvation in the Cys-Asn-Ser Tripeptide

2010 ◽  
Vol 114 (27) ◽  
pp. 8961-8970 ◽  
Author(s):  
Catalina Soriano-Correa ◽  
Francisco J. Olivares del Valle ◽  
Aurora Muñoz-Losa ◽  
Ignacio Fdez. Galván ◽  
M. Elena Martín ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Theoretical Study ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

scholarly journals 1-[(E)-(3-Hydroxy-4-methoxybenzylidene)amino]-3-methylthiourea

IUCrData ◽  
2016 ◽  
Vol 1 (10) ◽  
Author(s):  
Md. Azharul Arafath ◽  
Farook Adam ◽  
Mohd. R. Razali
Keyword(s):  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Intramolecular Hydrogen Bonds ◽  
Compound C ◽  
Schiff Base Compound ◽  
Intramolecular Hydrogen ◽  
Dimeric Aggregates ◽  
Base Compound

In the title thiosemicarbazone Schiff base compound, C10H13N3O2S, the dihedral angle between the benzene ring and methyl carbothioamide side arm was found to be 17.4 (4)°. The presence of two intramolecular hydrogen bonds is noted, namely hydroxy-O—H...O(methoxy) and amine-N—H...N(imine). In the crystal, pairwise amine-N—H...S hydrogen bonds give rise to centrosymmetric {...HNCS}2 synthons, which lead to dimeric aggregates.

Intramolecular hydrogen bonds in fluorinated, methoxylated, or unsubstituted 2-(anilino)-1,4-naphthoquinones. A theoretical study

2013 ◽  
Vol 145 ◽  
pp. 58-62 ◽  
Author(s):  
Sarai Vega-Rodríguez ◽  
Rogelio Jiménez-Cataño ◽  
Elisa Leyva ◽  
Silvia Elena Loredo-Carrillo
Keyword(s):  
Hydrogen Bonds ◽  
Theoretical Study ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen
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