## Abstract The ^1^H, ^13^C and ^77^Se chemical shifts and the ^1^__J__[C(Me)H(Me)], ^1.2^__J__(SeC) and ^2^__J__(SeH) coupling constants in 14 __para__‐ or __meta__‐substituted selenoanisoles, RC~6~H~4~SeCH~3~, have been measured and the dependence of these parameters on the electronic effects
77Se, 13C and 1H NMR spectra of acyclic phenylselenenylalkanes and -alkenes and some of their selenoxides
✍ Scribed by Helmut Duddeck; Petra Wagner; Barbara Rys
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 602 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The ^77^Se, ^13^C and ^1^H NMR spectra of 57 mostly new compounds with phenylselenenyl groups attached to acyclic alkanes, alkenes and phenylalkanes and of 10 corresponding selenoxides are reported. Substituent effects on the chemical shifts of these nuclei were determined and are discussed in terms of the conformation and configuration. The results suggest that, in contrast to PhSeCCSePh fragments, CCCSe chains prefer a gauche conformation.
📜 SIMILAR VOLUMES
## Abstract ^77^Se and ^13^C chemical shift of 19 1,2,3‐selenadiazoles are discussed in terms of substituent effects and conforma‐tional behaviour of the molecules. It is shown that the ^77^Se chemical shifts of such compounds are suitable tools for chiral discrimination in diastereomeric compounds
## Abstract The ^13^C and ^77^Se NMR spectra of eight new unsubstituted biheterocycles containing a thiophene or selenophene ring condensed with an isothiazole or isoselenazole ring were recorded. The assignments of the ^13^C signals were made by the examination of chemical shifts, ^1^__J__(CH) cou
## Abstract The ^77^Se, ^13^C and ^1^H NMR spectra of the products of phenylselenenyl azide and chloride addition to methylenecyclohexane and cyclohexene are presented. Scalar couplings between ^77^Se and ^1^H/^13^C allowed the absolute assignment of the regioisomers in the ^1^H and ^13^C spectra.
Numerous areneselenenamides derived from ammonia, primary and secondary amines and two N,N-bis(ary1-se1eno)alkylamines have been studied. The selenenamides bearing an electron-withdrawing substituent on the aromatic moiety are stable. The 'H, 13C and 77Se chemical shifts and some coupling constants