- A

- B

- C

- D

View written solutionFree
Correct answer: B, C, D
The question asks which reaction(s) give tert-butyl benzene as the major product, but the actual reaction schemes for options A, B, C, D are missing from the prompt.
Since this is an organic chemistry reaction-identification question, the answer depends entirely on the specific reagents/conditions in each option. Without the structures/reaction conditions, it is not possible to independently derive which options produce tert-butyl benzene.
What would normally be checked
To determine whether tert-butyl benzene is formed as the major product, we would examine whether the reaction generates a tert-butyl electrophile/radical or whether rearrangement leads to the tert-butyl-substituted aromatic product. Typical relevant cases include:
- Friedel–Crafts alkylation using a tert-butyl halide/alcohol/alkene in the presence of a Lewis or Brønsted acid.
- Rearrangement-prone carbocation conditions where a less stable carbocation rearranges to a tert-butyl cation before electrophilic substitution.
- Reactions involving isobutylene + acid with benzene.
- Conditions where polyalkylation or rearrangement affect the major product.
Limitation
Because the actual option details are absent, I cannot verify A/B/C/D rigorously.
Comparison with stored answer
The stored correct answer is B, C, D, but since the reaction schemes are not provided, I cannot honestly confirm or refute that from first principles.
Please provide the reaction schemes/options A–D (image or text), and I can solve it step-by-step properly.
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