Substituent effect on ring proton chemical shifts in PMR spectra of monosubstituted pyridines
β Scribed by O. P. Shkurko; A. Yu. Denisov; V. P. Mamaev
- Publisher
- Springer US
- Year
- 1989
- Tongue
- English
- Weight
- 354 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0009-3122
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Proton N M R spectra of ]-substituted 2,4-dimethylbcnzenes (2). I-substituted 2.6dimethylbenzenes (3) and 1-substituted 2,4,6-trimethylbenzenes (4) were determined and the SCS values compared with those of monosubstituted benzenes (1). SCS of 1 are assumed to be primarily due to the effects of x-ele
Reproducible proton chemical shifts in the porphyrin series are obtained when the spectrum is measured in chloroform using the zinc (11) complex of the porphyrin in the presence of an excess of pyrrolidine. This method is specifically demonstrated for the case of 2,4-dicyanodeuteroporphyrin-M dimeth
The chemical shifts of the CI,-and C,s-hydrogens of 30 14a,l7a-bridged 20-ketopregnanes and of four 14a, 17a-bridged 17-cyanoandrostanes were correlated by means of additive substituent constants. Because the bridged D-ring of these steroids is a substituted bicyclo[2.2.l]Iieptaiie sytem, attempts w