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That's how I proceeded with the question. However the answer is tert-butylbenzene. I can't figure out why do I have an extra carbon atom.

SOURCE
- JEE Advanced 1994

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    $\begingroup$ Yes, your mechanism seems quite correct. I believe it must be a printing error $\endgroup$ – YUSUF HASAN Jan 18 at 13:07
  • $\begingroup$ I agree. No way can you get t-Bu Benzene from this sytem. $\endgroup$ – Waylander Jan 18 at 13:39
  • $\begingroup$ I feel like dehydration of the alcohol is going to be much more likely under the forcing conditions whereby you might actually generate that primary cation... $\endgroup$ – Zhe Jan 18 at 16:39
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    $\begingroup$ Benzene, the nucleophile, attacks the alcohol - as the cation - which is the electrophile. ;) $\endgroup$ – user55119 Jan 22 at 23:42
  • $\begingroup$ The original question doesn't have an extra carbon. $\endgroup$ – PolarBear Feb 18 at 8:06

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