Excess of isobutane on reaction with Br2 in presence of light at 125°C gives which one of the following, as the major…
Haloalkanes & Haloarenes · Class 12 · JEE Main Previous Year Question
Excess of isobutane on reaction with in presence of light at 125°C gives which one of the following, as the major product?
- a
- b✓
- c
- d
Key Points:
- Free radical bromination: 3° >> 2° > 1° (highly selective)
- Free radical chlorination: 3° > 2° > 1° (less selective)
- Isobutane has one 3° carbon → major product is tert-butyl bromide
- Br• selectivity: 1600:80:1 (3°:2°:1°) vs Cl• selectivity: 5:4:1
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