When 2-methyl butane-1-ol is dehydrated to give an alkene, the preferred product is

Options

A. 2-methyl but-1-ene
B. but-1-ene
C. 2-methyl but-2-ene
D. but-2-ene

Answer

A

Explanation

Where the structure of the alkyl group permits, rearrangement takes place:
`CH_(3)-CH_(2)overset(CH_(3))overset(|)(CH)-CH_(2)overset(..)(O)H+H^(o+) rarr underset((("more stable than"),(2^(@) "carbocation")))underset("2-methyl but-2-ene")(CH_(3)-CH_(2)=overset(CH_(3))overset(|)(C)-CH_(3))`