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Un nouveau mécanisme réactionnel en série aromatique: Addition - substitution

✍ Scribed by J.-D. Aubort

Publisher
John Wiley and Sons
Year
1968
Tongue
German
Weight
300 KB
Volume
51
Category
Article
ISSN
0018-019X

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The mechanism of activated nucleophilic substitution in the aromatic series (S. N. A. \*) can be integrated in the general scheme of S. N. synchronous mechanisms. The relative order of mobilities of the halogens in S. N. A. \* type reactions, wich varies with the nucleophilic activity of the reagent

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## Abstract The rates of reaction of 2‐, 3‐ and 4‐chloropyridine N‐oxides towards 1 M piperidine in methanol have been measured conductimetrically. Apparent unimolecular rate constants at 80°C are respectively 3,70.10^−4^, 1,04.10^−7^ and 1,02.10^−4^ sec^−1^. The reactivity sequence 2 > 4 >> 3 is d