Table 2.
Isoprene Unit | Methyl Groups | δC | δH |
α | 24.2 | 1.73 | |
β to ω-3 | 24.4 | 1.67,7 methyl groups | |
ω | 26.5 | 1.66,1 methyl groups | |
ω-1, ω-2 | 17.0 | 1.60,1 methyl groups 1.57,1 methyl groups |
|
ω | 16.8 | 1.57,1 methyl groups | |
Isoprene Unit | Methylene Groups | ||
α | 63.9 | 4.443 | |
α | 33.0 | 2.08 | |
β to ω | 27.5 | 2.04 | |
β to ω-3 | 33.2 | 2.02 | |
ω-1 to ω-2 | 40.6 | 1.97 | |
Isoprene Unit | Methine Groups | ||
α | 122.5 | 5.384 | |
β to ω-3 | 125.9 | ∼5.10 | |
ω to ω-2 | 124.5 | ∼5.10 | |
Isoprene Unit | Quaternary Carbons | ||
α | 142.3 | ||
β to ω-3 | 137.3 | ||
ω to ω-2 | 136.9 |
Abbreviations: adj, adjacent in relation to a methine proton of an isoprene unit; likewise, cis and trans are used throughout to designate the configurations of various groups in relation to a methine proton of an isoprene unit, as shown above.