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Transmission of substituent effects in 1,2,3-selenadiazole derivatives—I

✍ Scribed by G. A. Caplin

Publisher
John Wiley and Sons
Year
1973
Tongue
English
Weight
948 KB
Volume
5
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Chemical shifts are reported for the heterocyclic ring hydrogen of a series of para‐substituted 4‐aryl‐1,2,3‐selenadiazoles and substituent effects are evaluated statistically by means of the Swain‐Lupton multiple correlation analysis. A satisfactory understanding of the various substituent effects is obtained by this approach. Excellent correlations were obtained for a number of varying aliphatic solvents, no serious hindrances to correlation being encountered. An approach was also made towards an understanding of aliphatic‐ and aromatic‐induced solvent shifts, as far as these are modified by substituents.

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✍ Helmut Duddeck; Petra Wagner; Dieter Müller; Joseph Csaba Jászberényi 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 390 KB

## Abstract The ^13^C, ^15^N and ^77^Se NMR data (chemical shifts and coupling constants) of some cycloakeno‐1,2,3‐selenadiazoles are presented. Extremely large ^77^Se chemical shifts are found. ^15^N, ^77^Se coupling constants, obtained at natural abundance, are reported for the first time. Strong