Answer: sp 3 hybridised.
- A sp hybridised
- B sp<sup>3</sup> hybridised
- C sp<sup>2</sup> hybridised
- D sp<sup>3</sup>d hybridised
Correct answer: B. sp<sup>3</sup> hybridised
Explanation: In a haloalkane the halogen is joined to a tetrahedral, sp<sup>3</sup> hybridised carbon.
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.