chemical shift difference (A8 = 2.4-2.9 ppm) between the axial (Ha) and equatorial (He) protons of the cis-methylene group. In contrast, the corresponding chemical shift difference of the trans-methylene groxp is much smaller (A% = 1-1.4 PPm). R 4-Bromoheptane 2-Bromoheptane 2-Bromooctane
Spin trapping of radicals generated by ultrasonic decomposition of organotin compounds
โ Scribed by D. Rehorek; Edward G. Janzen
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 303 KB
- Volume
- 268
- Category
- Article
- ISSN
- 0022-328X
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## Abstract A series of substituted 4โmethylphenols **1** and **2** was oxidized with PbO~2~ in the presence of nitroso compounds **3**โ**10**. The formation of adducts of benzyl radicals with the nitroso spin traps in the reaction mixture was established, suggesting the abstraction of an Hโatom fr