NMR studies of barriers to rotation in N-nitrosamines
β Scribed by S.M. Glidewell
- Book ID
- 113373924
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 527 KB
- Volume
- 33
- Category
- Article
- ISSN
- 1386-1425
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π SIMILAR VOLUMES
## Abstract Natural abundance ^17^O NMR data for seven aliphatic, nine cyclic and thirteen aromatic __N__βnitrosamines, recorded at room temperature in acetonitrile, are reported. Differences in chemical shifts among and within the three groups are discussed in terms of electronic and steric effect
The barrier to the internal rotation of the dirnethylamino group in thioamides of structure R-CS-N(CH,),, R being (CH,),N-CS--, CH,O,C-or N=C--, is studied by proton magnetic resonance, using the lineshape analysis method of Nakagawa. In the solvents o-dichlorobenzene, naphthalene and nitrobenzene a
## Abstract Molecular modeling by molecular mechanics (MM2) calculations were used to predict conformational preferences of cyclic __N__βnitrosamines. The results were compared with ^1^H NMR data. The observed geminal coupling constants ^2^__J__ were considerably stronger for __syn__ than for __ant