## Abstract An earlier short communication on this topic reports some incorrect ^11^B^13^C coupling parameters. The correct data are given together with some ^10^B coupling and isomer shift data.
FT-NMR investigation of 13C11B coupling
✍ Scribed by D. E. Axelson; A. J. Oliver; C. E. Holloway
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 98 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The ^13^C FT‐NMR spectrum of sodium tetraphenylboron obtained with proton decoupling has a line‐shape which suggests the operation of a magnetic‐dipole relaxation mode. Coupling constants between ^11^B and the ring carbons are reported.
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Carbon-13 NMR data of [iilmetacyclophane (la), its 8,ll-dihalosubstituted derivatives lb-ld and of some model compounds are reported and discussed. A remarkable downfield shift is observed for the aromatic carbon between the bridging carbons; this is tentatively ascribed to long-range effects of the
## Abstract Broad ^13^C resonances, as the result of partially relaxed scalar ^13^C^11^B coupling, were observed for the C‐1 and to a lesser extent C‐2 carbons of 1‐alkynyldioxaborolanes at 25°C. Measurement of the ^13^C spectra at 102°C resulted in a slower ^11^B quadrupolar relaxation rate and a
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