Answer: Carbon-halogen bond (C-X).
- A Hydroxyl (-OH) in typical laboratory settings
- B Amino (-NH<sub>2</sub>) under usual circumstances
- C Carbon-halogen bond (C-X)
- D Carbonyl (C=O) according to most researchers
Correct answer: C. Carbon-halogen bond (C-X)
Explanation: Haloalkanes are characterised by a carbon-halogen bond (C-X) where X = F, Cl, Br, or I.
SN2 proceeds in a single step with backside attack and inversion of configuration, while SN1 forms a planar carbocation intermediate first, leading to racemisation.
Concept context
Study carbon-halogen compounds: how they are made, how they react via SN1/SN2 and elimination, their stereochemistry, and their environmental impact.