The expected Markovnikov addition product of HI to 2-mothyl-2-butene is: A) 2-io

Question

The expected Markovnikov addition product of HI to 2-mothyl-2-butene is: A) 2-iodopentane B) 2-iodo-2-methylbutane C) 1-iodo-2-methylbutane D) 1-iodo-3-methylbutane E) 2-iodo-3-methylbutane Which of the structures show depicts the most stable carbocation intermediate formed in the hydrohalogenation reaction shown? A) I B) II C) III D) IV E) V The expected major product of the following reaction is: The expected major product of the following reaction is: Which of the molecules below arises from anti-Markovnikov hydrohalogenation with HBr of the alkene shown? Which of the following carbocations is (are) likely to undergo rearrangement through a methyl shift? A) I B) II C) III D) I and II E) II and III The expected major product of the following reaction is: A) I B) II C) III D) IV E) V The expected major product of the following reaction is: A) I B) II C) III D) IV E) V

Explanation / Answer

Ans 16 . B . 2-iodo-2-methylbutene

In the addition of halide group to alkene using markovnikov rule , tertiary carbon containing double bond is more preferred over secondary carbon containing double bonds.

More substituted carbon atoms are preferred for halide addition . So the second carbon gets the halide ion and third gets hydrogen atom to yield the product , 2-iodo-2-methylbutene.

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