question_answer

The major product obtained on treatment of \[C{{H}_{3}}C{{H}_{2}}CH(F)C{{H}_{3}}\] with \[C{{H}_{3}}{{O}^{-}}/C{{H}_{3}}OH\]is

A) \[C{{H}_{3}}C{{H}_{2}}CH(OC{{H}_{3}})C{{H}_{3}}\]

B) \[C{{H}_{3}}CH=CHC{{H}_{3}}\]

C) \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\]

D) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OC{{H}_{3}}\]

Correct Answer: B

Solution :

According   to   Saytzeff   rule   during dehydrohalogenation of an alkyl halide H-atom is removed from that C-atom which has lesser number of hydrogen atoms (f. e., to form) more alkylated alkene. \[C{{H}_{3}}C{{H}_{2}}CH(F)C{{H}_{3}}\xrightarrow[C{{H}_{3}}OH]{C{{H}_{3}}ONa\,(base)}\]