In SN2 reactions, the hybridization of carbon in moving from substart to transition state changes from:
Correct answer: C. Sp3 to sp2
- A. Sp2 to sp3
- B. Sp to sp2
- C. Sp3 to sp2
- D. Sp to sp3
Explanation
Normally, a carbon atom is sp3 hybridized. In the transition state of the SN2 mechanism, the carbon atom is sp2 hybridized due to its planar structure. At this point, carbon almost acquires 'pentavalency' with three full bonds and two 'partial' bonds, and a planar complex is formed, which is sp2 hybridized. Hence, option C is correct.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Nucleophilic Substitution
Nucleophilic substitution replaces a leaving group in an alkyl halide when an electron-rich nucleophile attacks the carbon atom. The topic compares SN1 and SN2 mechanisms, including reaction conditions, substrate structure, solvent effects, nucleophile strength, carbocation formation and stereochemical changes, and distinguishes substitution from elimination.
Practise Alkyl Halides
458 free Alkyl Halides MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Nucleophilic Substitution questions
During the course of a SN1reaction, the intermediate species formed is:
SN1 reactions are favored by which of the following reactions?
During SN1 mechanism, the nucleophile can attack on the halogen carbon _.
When n-butyl magnesium iodide is treated with water, the product is:
During SN2 reactions, configuration of the alkyl halide molecule:
The alkaline hydrolysis of bromoethane shown below gives alcohol as the product H3C―CH2―Br → H3C―CH2―OH. The reagent and the condition used in this reaction may be: