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

Intramolecular hydrogen bonds and the orientation of amino groupsin o-phenylenediamines

1967 ◽  
Vol 45 (19) ◽  
pp. 2135-2141 ◽  
Author(s):  
P. J. Krueger
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Infrared Absorption ◽  
Substituent Effect ◽  
Proton Donor ◽  
Proton Acceptor ◽  
Amino Groups ◽  
Intramolecular Hydrogen Bonds ◽  
Infrared Absorption Spectra ◽  
Intramolecular Hydrogen

The infrared absorption spectra of partially deuterated o-phenylenediamine and 4,5-di-methyl-, 4-methyl-, and 4-chloro-o-phenylenediamine in dilute CCl4 solution show double intramolecular [Formula: see text] hydrogen bonds in which the two NHD groups are equivalent and each group acts as both a proton donor and a proton acceptor. The ring substituent effect on this interaction in these compounds is small. In 4-methoxy-o-phenylenediamine, the amino groups are not equivalent, but double intramolecular hydrogen bonds are still present. In 4-nitro-o-phenylenediamine, only one intramolecular [Formula: see text] hydrogen bond appears to exist. The effect of N-substitution on some of these observations is discussed.

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.

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

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

Theoretical study of the intramolecular hydrogen bonds of aromatic peroxy radicals from OH–toluene reactions

2006 ◽  
Vol 774 (1-3) ◽  
pp. 1-6 ◽  
Author(s):  
Mingqiang Huang ◽  
Weijun Zhang ◽  
Yong yang ◽  
Zhenya Wang ◽  
Liqing Hao ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Theoretical Study ◽  
Peroxy Radicals ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen
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