𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Comportement de 1-(3,4-Diméthyl-5-Isoxazolyl)-3-Aryltriazenes et de Diaryl-1,3Triazenes Sous L'Impact Electronique

✍ Scribed by A. Maquestiau; Y. van Haverbeke; R. Flammang; M. Willame; G. Vernin; C. Siv; J. Metzger

Publisher
Wiley (John Wiley & Sons)
Year
2010
Weight
325 KB
Volume
88
Category
Article
ISSN
0037-9646

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The mass spectra of 1‐(3,4‐dimethyl‐5‐isoxazolyl)‐3‐aryltriazenes may be interpreted on the predominance, in the vapor phase, of the structure A in which the azo group is conjugated with the heterocyclic moiety. This tautomer generates an isoxazolyl diazonium ion b wich rearranged before the loss of nitrogen. Para substituents on the aromatic ring have a weak influence on the displacement of this tautomeric equilibrium.

Similarly, the mass spectra of 3‐aryl‐1‐p‐tolyl‐triazenes show that the equilibrium is only weakly influenced by the position and the nature of the substituent on the aromatic ring.

📜 SIMILAR VOLUMES

Structure cristalline et moléculaire de
Structure cristalline et moléculaire de la cyano-5 triméthyl-4,4,6 nitrométhylène-2 oxo-3 tetrahydro-1,2,3,4 pyridine et de l'(acétoxy-1 nitro-2 vinyl)-5 dicyano-3,5 diméthyl-4,4 pyrazoline-2-(z)
✍ J. P. Declercq; G. Germain; M. van Meerssche; M. Hajek; A. Kurfürst 📂 Article 📅 2010 🏛 Wiley (John Wiley & Sons) ⚖ 264 KB 👁 1 views

## Abstract The crystal structure of 5‐cyano‐4,4,6‐trimethyl‐2‐nitromethylene‐3‐oxo‐1,2,3,4‐tetrahydropyridine (compound I) and (Z)‐5‐(1‐acetoxy‐2‐nitroviny1)‐3,5‐dicyano‐4,4‐dimethyl‐2‐pyrazoline (compound II) has been determined by X‐ray diffraction analysis. The direct solution of the structures

Réactions de Friedel et Crafts de dérivé
Réactions de Friedel et Crafts de dérivés aromatiques sur les composés dioxo-1,4,2,3-non saturés. IV. Réactions des hydroxy-5-ouchloro-5-diméthyl-3,5- ou diméthyl-4,5-dihydro-2,5-furannones-2
✍ Jean-Claude Canévet; Yves Graff 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 German ⚖ 454 KB

**__Friedel‐Crafts__** **reactions of aromatic derivatives with 1,4‐dicarbonyls 2,3‐éthylenic compounds. Part IV. Reactions of 5‐hydroxy or 5‐chloro 3,5‐dimethyl or 4,5‐dimethyl 2 (5 H) furanones** We studied the __Friedel‐Crafts__ reactions of 2‐(5__H__)‐furanones. In the presence of sulfuric acid