The major product formed in the following reation is
`CH_(3)-underset(H)underset(|)overset(CH_(3))overset(|)C-CH_(2)-Br underset(CH_(3)OH)overset(CH_(3)ONa)rarr` .

Options

A. `CH_(3)-overset(CH_(3))overset("| ")underset("H ")underset("| ")("C ")-CH_(2)OCH_(3)`
B. `CH_(3)-underset(OCH_(3))underset("| ")("C ")H-CH_(2)CH_(3)`
C. `CH_(3)-overset(CH_(3))overset("| ")("C ")=CH_(2)`
D. `CH_(3)-overset(CH_(3))overset("| ")underset(OCH_(3))underset("| ")("C ")-CH_(3)`

Answer

C

Explanation

In case of alkyl fluorides, the orientation of elimination is not governed by the stability of the alkene being formed (Saytzeff rule) but is governed by the acidity of the `beta`-hydrogen to be eliminated (Hofmann rule). Consequently, the major product is formed by elimination of the more acidic `beta`-hydrogen. For example in 2 fluro butane (I) due to + I effect of the `CH_(3)` group, the `beta`- hydrogen on C-1. Therefore, the `beta`-hydrogen from C-1 being more acidic is lost more easily and hence the major product is but-1-ene.