A nearly zero methyl group rotation barrier in γ-picoline
✍ Scribed by A.E. Zweers; H.B. Brom; W.J. Huiskamp
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 108 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0375-9601
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📜 SIMILAR VOLUMES
## Abstract The resonances in the ^13^C NMR spectra of 1,2,5,6‐tetramethyl‐3,4‐dimethylenetricyclo[3.1.0.0^2,6^]hexane and the corresponding enone and dione have been assigned. The rotation energy barriers of the methyl groups have been determined from ^13^C spin‐lattice relaxation time measurement
Heat capacities and enthalpy increments between the temperatures \(T=10 \mathrm{~K}\) and \(445 \mathrm{~K}\) were determined for the six dimethylpyridines by adiabatic calorimetry. (Chemical Abstract registry numbers: 2,3-dimethylpyridine [583-61-9]; 2,4-dimethylpyridine [108-47-4]; 2,5-dimethylpyr