Isotopic Perturbation of Intramolecular Hydrogen Bonds in Rigid 1,3-Diols:  NMR Studies Reveal Unusually Large Equilibrium Isotope Effects

1996 ◽  
Vol 61 (26) ◽  
pp. 9610-9613 ◽  
Author(s):  
Bridgette N. Craig ◽  
Matthew U. Janssen ◽  
Brian M. Wickersham ◽  
David M. Rabb ◽  
Peter S. Chang ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Isotope Effects ◽  
Nmr Studies ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

Do strong intramolecular hydrogen bonds persist in aqueous solution? Variable temperature gradient 1H, 1H–13C GE-HSQC and GE-HMBC NMR studies of flavonols and flavones in organic and aqueous mixtures

Tetrahedron ◽  
2002 ◽  
Vol 58 (37) ◽  
pp. 7423-7429 ◽  
Author(s):  
Vassiliki Exarchou ◽  
Anastasios Troganis ◽  
Ioannis P Gerothanassis ◽  
Maria Tsimidou ◽  
Dimitrios Boskou
Keyword(s):  
Aqueous Solution ◽  
Temperature Gradient ◽  
Hydrogen Bonds ◽  
Variable Temperature ◽  
Aqueous Mixtures ◽  
Nmr Studies ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

Inter- and intramolecular hydrogen bonds in polyamines: variable-concentration 1 H-NMR studies

2011 ◽  
Vol 24 (11) ◽  
pp. 1067-1071 ◽  
Author(s):  
Norma Sbarbati Nudelman ◽  
Cecilia E. Silvana Alvaro
Keyword(s):  
Hydrogen Bonds ◽  
Nmr Studies ◽  
Intramolecular Hydrogen Bonds ◽  
Variable Concentration ◽  
H Nmr ◽  
Intramolecular Hydrogen

scholarly journals A hemicryptophane with a triple-stranded helical structure

2018 ◽  
Vol 14 ◽  
pp. 1885-1889 ◽  
Author(s):  
Augustin Long ◽  
Olivier Perraud ◽  
Erwann Jeanneau ◽  
Christophe Aronica ◽  
Jean-Pierre Dutasta ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bonds ◽  
Helical Structure ◽  
Aromatic Rings ◽  
Nmr Studies ◽  
Intramolecular Hydrogen Bonds ◽  
X Ray ◽  
H Nmr ◽  
Amine Groups ◽  
Intramolecular Hydrogen

A hemicryptophane cage bearing amine and amide functions in its three linkers was synthesized in five steps. The X-ray molecular structure of the cage shows a triple-stranded helical arrangement of the linkers stabilized by intramolecular hydrogen bonds between amide and amine groups. The chirality of the cyclotriveratrylene unit controls the propeller arrangement of the three aromatic rings in the opposite part of the cage. 1H NMR studies suggest that this structure is retained in solution.

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