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Nucleophilic substitutions at the pyridine ring. Conformational preference of the products and kinetics of the reactions of 2-chloro-3-nitro- and 2-chloro-5-nitro-pyridines with arenethiolates †

✍ Scribed by Hamed, Ezzat A.; El-Bardan, Ali A.; Saad, Esmat F.; Gohar, Gamal A.; Hassan, Ghada M.


Book ID
120007571
Publisher
Royal Society of Chemistry
Year
1997
Tongue
English
Weight
139 KB
Volume
11
Category
Article
ISSN
1472-779X

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📜 SIMILAR VOLUMES


Nucleophilic substitutions at the pyridi
✍ Ezzat A. Hamed 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 148 KB 👁 2 views

The kinetics of the reactions of 2-chloro-3-nitropyridine (ortho-like) and 5-nitro ( para-like) isomer with morpholine and piperidine were studied in methanol and benzene at several amine concentrations and temperatures in the range 25 -45°C. The data show that k 3-NO 2 /k 5-NO 2 ratios are less tha

Nucleophilic substitution at the pyridin
✍ Ezzat A. Hamed 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 129 KB 👁 2 views

The reaction rates of 2-chloro-3,5-dinitropyridine 1 with a series of arylthiolates 2a-h in methanol have been measured at 25°C. The products are the corresponding 2-thioaryl-3,5-dinitropyridine 3a-h. Good Hammett correlation with value Ϫ1.19 was obtained suggesting an elimination-addition mechanism

Kinetics of the reaction of 2-chloro-3-n
✍ Ali A. El-Bardan 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 71 KB 👁 2 views

The kinetics of the reaction of 2-chloro-3-nitropyridine (ortho-like) and 2-chloro-5-nitropyridine (para-like) with a series of aryloxide ions were studied in methanol at different temperatures. Plots of DH ≠ versus DS ≠ for both reactions gave good straight lines with isokinetic temperatures of 168