Hydrogen bonding in complexes of heterocyclic N-oxides with halogenoacetic acids
โ Scribed by Z. Dega-Szafran; E. Grech; M.Z. Naskret-Barciszewska; M. Szafran
- Publisher
- Elsevier Science
- Year
- 1973
- Weight
- 464 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0001-8716
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๐ SIMILAR VOLUMES
The "N NMR chemical shifts of eight substituted pyridine N-oxides (B) and their complexes (AHB) with methanol and dichloroacetic and trifluoromethanesulfonic acids were measured in chloroform-d at the natural abundance level. The measured chemical shifts are strongly affected by substituents, hydrog
## Abstract The ^1^H NMR spectra of seven __N__โ(pyridyl)amides of 6โmethylpicolinic acid __N__โoxide in chloroform were obtained. The influence on the chemical shifts of the N๏ฃฟH protons of temperature, concentration and the CH~3~ substituent in the pyridine ring was studied. The N๏ฃฟH protons were f
A novel series of hydrogen-bonded solid 1 : 1 acid-base complexes of 15 N-labeled 2,4,6-trimethylpyridine (collidine) with carboxylic acids and their hydrogen bond deuterated analogs were synthesized and studied by 1 H magic angle spinning (MAS) and 15 N cross-polarization NMR with and without MAS.
## Abstract The ^1^H n.m.r. spectra of eleven anilides of 6โmethylโpicolinic acid __N__โoxide in chloroform were obtained. The influence of temperature, concentration and substituents on the chemical shifts of the N๏ฃฟH protons was investigated. The structure of the anilides is discussed.