A theoretical study of substituent effects on tautomerism of 2-hydroxybenzimidazoles
✍ Scribed by Cemil Öğretir; Selma Yarlıgan; Halil Berber; Taner Arslan; Seda Topal
- Publisher
- Springer-Verlag
- Year
- 2003
- Tongue
- English
- Weight
- 223 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1610-2940
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📜 SIMILAR VOLUMES
## Abstmct: The a@ sub&umts at positions 4 and 6 do not erert observable &unmic cffcts on the ting-chain tautomeric mtios of 2,4-or 2,6-aTaqbubstituted-tetmhydm-1,~~. On the other hand, the ekaivnic @ect of the Z-a~yl subs&em is mat&& in all eight seties s&die4 the equilibria CM be desctibed @ the
The electronic structure and substituent effects (SEs) in 2-bromo-5-chlorothiophene, 2-bromo-5-methylthiophene, and 2-bromo-5-nitrothiophene have been investigated by HeI photoelectron spectroscopy (PES). The observed PES bands were analyzed by combining empirical arguments and theoretical methods.