Barriers to internal rotation in 1,3,5-trineopentylbenzenes: V—conformational studies by carbon-13 magnetic resonance
✍ Scribed by Bertil Nilsson; Torbjörn Drakenberg
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- English
- Weight
- 494 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The temperature dependence of the carbon‐13 NMR signals in three completely substituted 1,3,5‐trineopentylbenzenes has been studied by the Fourier transform technique. The assignment of all peaks was based on studies of 1,3,5‐trineopentylbenzene and some of its mono‐ and disubstituted derivatives. Nearly all carbon signals showed a splitting into several peaks at low temperature, which gave information about the existing rotamers in the completely substituted compounds. Spectra for one compound were studied in a narrow temperature interval in order to test the reliability of rate constants obtained from ^13^C FT spectra. Good agreement was found between previously reported values obtained from ^1^H NMR and those obtained in this investigation.