Intramolecular hydrogen bonds in derivatives of nucleosides

1963 ◽  
Vol 28 (6) ◽  
pp. 1622-1625 ◽  
Author(s):  
J. Piťha ◽  
S. Chládek ◽  
J. Smrt
Keyword(s):  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen ◽  
Derivatives Of

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.

Intramolecular hydrogen bonds in the sulfonamide derivatives of oxamide, dithiooxamide, and biuret. FT-IR and DFT study, AIM and NBO analysis

Tetrahedron ◽  
2010 ◽  
Vol 66 (44) ◽  
pp. 8551-8556 ◽  
Author(s):  
B.A. Shainyan ◽  
N.N. Chipanina ◽  
T.N. Aksamentova ◽  
L.P. Oznobikhina ◽  
G.N. Rosentsveig ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Nbo Analysis ◽  
Dft Study ◽  
Intramolecular Hydrogen Bonds ◽  
Ft Ir ◽  
Intramolecular Hydrogen ◽  
Derivatives Of ◽  
Aim And Nbo

Intramolecular hydrogen bonds involving organic fluorine in the derivatives of hydrazides: an NMR investigation substantiated by DFT based theoretical calculations

2015 ◽  
Vol 17 (23) ◽  
pp. 15226-15235 ◽  
Author(s):  
Sandeep Kumar Mishra ◽  
N. Suryaprakash
Keyword(s):  
Hydrogen Bonds ◽  
Theoretical Calculations ◽  
Two Dimensional ◽  
Dimensional Solution ◽  
Intramolecular Hydrogen Bonds ◽  
Solution State ◽  
Nmr Techniques ◽  
Intramolecular Hydrogen ◽  
Derivatives Of ◽  
Organic Fluorine

The rare examples of intramolecular hydrogen bonds (HB) of the type the N–H⋯F–C, detected in a low polarity solvent in the derivatives of hydrazides, by utilizing one and two-dimensional solution state multinuclear NMR techniques, are reported.

scholarly journals Intramolecular hydrogen bond directed distribution of conformational populations in the derivatives of N′-benzylidenebenzohydrazide

2019 ◽  
Vol 43 (33) ◽  
pp. 13134-13142 ◽  
Author(s):  
Neeru Arya ◽  
Sandeep Kumar Mishra ◽  
N. Suryaprakash
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bond ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen ◽  
Derivatives Of

The extensive NMR investigations reveal the presence of E-isomers in the derivative of N′-benzylidenebenzohydrazide. The different conformer populations are controlled by the strength of intramolecular hydrogen bonds.

Organic fluorine involved intramolecular hydrogen bonds in the derivatives of imides: NMR evidence corroborated by DFT based theoretical calculations

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86013-86022 ◽  
Author(s):  
Sandeep Kumar Mishra ◽  
N. Suryaprakash
Keyword(s):  
Hydrogen Bonds ◽  
Theoretical Calculations ◽  
Rare Occurrence ◽  
Intramolecular Hydrogen Bonds ◽  
Multinuclear Nmr ◽  
Intramolecular Hydrogen ◽  
Derivatives Of ◽  
Organic Fluorine

The rare occurrence of intramolecular hydrogen bonds (HBs) of the type N–H⋯F–C is detected in the derivatives of imides in a low polarity solvent by using multi-dimensional and multinuclear NMR experiments.

scholarly journals Influence of intramolecular hydrogen bonds on the binding potential of methylated β-cyclodextrin derivatives

2012 ◽  
Vol 8 ◽  
pp. 1890-1895 ◽  
Author(s):  
Gerhard Wenz
Keyword(s):  
Hydrogen Bonds ◽  
Binding Potential ◽  
Free Energies ◽  
Intramolecular Hydrogen Bonds ◽  
Isothermal Titration Microcalorimetry ◽  
Titration Microcalorimetry ◽  
Intramolecular Hydrogen ◽  
Hydroxy Groups ◽  
Derivatives Of ◽  
Binding Free Energies

Various heptasubstituted derivatives of β-cyclodextrin (β-CD) bearing 1, 2 and 3 methyl substituents per glucose unit were synthesized by regioselective methods. Binding free energies and binding enthalpies of these hosts towards 4-tert-butylbenzoate and adamantane-1-carboxylate were determined by isothermal titration microcalorimetry (ITC). It was found that methyl substituents at the secondary positions of β-CD lead to a tremendous reduction of the binding potential, while methylation at the primary positions significantly improved binding. Stabilizing intramolecular hydrogen bonds between the glucose units were made responsible for the high binding potentials of those β-CD derivatives that possess secondary hydroxy groups.

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