The 13 C NMR spectra of copolymers of ethylene with 4-methyl-1-hexene and 4-methyl-1-pentene, respectively, were compared. The 4-methyl-1-hexene/ethylene copolymer, which contains an unsymmetric 2-methylbutyl branch, exhibits two distinct 13 C NMR peaks for each of the pairwise methylenes spaced one
β¦ LIBER β¦
Conformational origin of the nonequivalent carbon-13 NMR chemical shifts observed for the isopropyl methyl carbons in branched alkanes
β Scribed by Tonelli, A. E.; Schilling, F. C.; Bovey, F. A.
- Book ID
- 127137701
- Publisher
- American Chemical Society
- Year
- 1984
- Tongue
- English
- Weight
- 246 KB
- Volume
- 106
- Category
- Article
- ISSN
- 0002-7863
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## Abstract Carbonβ13 chemical shift parameters for equatorial and axial substituents in cyclohexane are reported for methyl, ethyl, isopropyl, methoxy and phthalimido substituents. The usefulness of the alkyl parameters is demonstrated by the agreement between calculated and observed ^13^C shifts
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