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MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Organic ChemistryHydrocarbonsPreparation of Alkenes

What are the products of dehydrohalogenation of 2- iodopentane ?

A.2-Pentene (major), 1-Pentene (minor)✓ Correct

B.1-Pentene (major), 2-Pentene (minor)

C.2-Pentene (50%), 1-Pentene (50%)

D.None of these.

Explanation

As per shown reaction, 2- pentene is more alkylated product than 1- pentene. Therefore, according to Saytzeff rule more alkylated alkene is more stable due to the presence of more alpha- hydrogens. Therefore, 2- pentene is the major product. 3 2 2 3 3 2 3 2 2 2 3 HI CH CHI CH CH CH CH CH CH CH CH CH CH CH CH CH ->

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