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Isotopic exchange in heterocyclic quaternary salts. II. (1) Hydrogen-deuterium exchange ln active c-methyl groups

✍ Scribed by Margareta Bologa; A. Barabás; Viorica I. Dénes; F. Chiraleu

Publisher: John Wiley and Sons
Year: 1977
Tongue: French
Weight: 464 KB
Volume: 13
Category: Article
ISSN: 0022-2135
DOI: 10.1002/jlcr.2580130102

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✦ Synopsis

The non-catalysed H-D exchange i n h e t e r o c y c l i c quaternary ammonium s a l t s (&-a)w a s studied by 'H-nmr.

📜 SIMILAR VOLUMES

Isotopic exchange of active methyl hydro

Isotopic exchange of active methyl hydrogens. V. (1) Reactivity of α- and γ-methyl groups and β-hydrogens in pyrylium salts

✍ Eugenia Gǎrd; Alice Vasilescu; G. D. Mateescu; A. T. Balaban 📂 Article 📅 1967 🏛 John Wiley and Sons 🌐 French ⚖ 366 KB

The deuteration and dedeuteration of 2,4,6-trimethylpyrylium perchlorate in water (D20 and HzO, respectively) was studied by nuclear magnetic resonance using as a quantitative standard for protons tetramethylammonium bromide. y-Methyl groups exchange faster than u-methyl groups; P-standing hydrogens