An X-ray crystallographic, 1H nuclear magnetic resonance, and MNDO SCF-MO conformational study of o-substituted N-benzylbenzothiohydroxamic acids

1984 ◽  
pp. 1511 ◽  
Author(s):  
Ana M. Lobo ◽  
Sundaresan Prabhakar ◽  
M. Amelia Santos ◽  
Henry S. Rzepa ◽  
David J. Williams
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Conformational Study ◽  
X Ray ◽  
1H Nuclear Magnetic Resonance ◽  
Nuclear Magnetic

Phenyl group as a probe in the 1H nuclear magnetic resonance study of the conformations of quaternary heteroaromatic carbapenem antibiotics. Identification of the site of quaternization in -SCH2- substituted nitrogen-containing heteroaromatic derivatives

1988 ◽  
Vol 66 (7) ◽  
pp. 1546-1551 ◽  
Author(s):  
Vanga S. Rao ◽  
Jean-Paul Daris ◽  
Marcel Menard
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Phenyl Group ◽  
Nuclear Magnetic Resonance Study ◽  
Conformational Study ◽  
Magnetic Resonance Study ◽  
Heteroaromatic Compounds ◽  
1H Nuclear Magnetic Resonance ◽  
Nuclear Magnetic

The phenyl group is shown as a useful probe in sensing the environment in the 1H nuclear magnetic resonance conformational study of a variety of quaternary heteroaromatic carbapenem derivatives. The influence of the -SCH2- substituent in determining the site of quaternization in nitrogen-containing heteroaromatic compounds is demonstrated through the acidity measurements of these methylene protons.

Iodide ion receptors: shape-persistent macrocycles of syn/anti Configurations

2021 ◽  
Author(s):  
Guang-Wei Zhang ◽  
Jia-Yin XIANG ◽  
Tao-Tao Zhong ◽  
Xin-Ru ZHI ◽  
Chuang Gao ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Single Crystal ◽  
1H Nmr ◽  
X Ray ◽  
Macrocyclic Receptors ◽  
Iodide Ion ◽  
1H Nuclear Magnetic Resonance ◽  
Ion Receptors ◽  
Nuclear Magnetic

This article reports a pair of rigid iodide ion macrocyclic receptors of syn/anti configurations. Single crystal X-ray analysis confirms the structure of the syn-isomers, 1H Nuclear Magnetic Resonance (1H NMR)...

scholarly journals 1H nuclear magnetic resonance conformational study of medium-sized rings: 3,4-dihydro-1,6-benzodiazocine-2,5-diones

1976 ◽  
Vol 54 (7) ◽  
pp. 1135-1138 ◽  
Author(s):  
José Elguero ◽  
Alain Fruchier ◽  
Georges Llouquet ◽  
Claude Marzin
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Membered Ring ◽  
Boat Conformation ◽  
Conformational Study ◽  
H Nmr ◽  
Nmr Study ◽  
1H Nuclear Magnetic Resonance ◽  
Interconversion Barrier ◽  
Nuclear Magnetic

From a 1H nmr study it has been possible to show that the eight-membered ring of the N,N′-disubstituted 3,4-dihydro-1,6-benzodiazocine-2,5-diones has a boat conformation, the interconversion barrier of which is slightly over 100 kJ/mol.

Anhydrous uranyl crown-ether complexes. 1H nuclear magnetic resonance and x-ray study

1979 ◽  
Vol 34 ◽  
pp. 87-90 ◽  
Author(s):  
Gerard Folcher ◽  
Pierrette Charpin ◽  
Rose-Marie Costes ◽  
Nelly Keller ◽  
George C.de Villardi
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Crown Ether ◽  
X Ray ◽  
1H Nuclear Magnetic Resonance ◽  
Crown Ether Complexes ◽  
Nuclear Magnetic
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