Study of the configurations of 3-aryl-substituted 1,5-diphenylformazans by resonance Raman and absorption spectroscopy: steric and conjugation effects of the substituent
✍ Scribed by Hidefumi Hiura; Hiroaki Takahashi
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 611 KB
- Volume
- 212
- Category
- Article
- ISSN
- 0022-2860
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract The substituent influence on the ^1^H and ^13^C NMR chemical shifts in 2‐substituted benzimidazoles and their anions and cations has been investigated. The transmission of the electronic effects of substituents from C‐2 to C‐5 (6) is approximately 20% less effective than that in the opp
The iniluence of substituents on the 'H, "C and 15N NMR chemical shifts of 2-substituted 5(6)nitrobenzimidazoles and their analogues labelled with 15N in the nitro group was investigated. It was found that the substituent effects are transmitted to the carbon and hydrogen nuclei in positions 4-7 mai
## Abstract The ^13^C chemical shifts for 1,3‐dithiane and 9 methyl substituted derivatives are reported. Only three of the methyl‐1,3‐dithianes were conformationally anancomeric and hence the conformational equilibria must be taken into account when deriving the values of the different substituent