Which of the following on heating gives an ether as major products? P: C6H5CH2Br + CH3ONa Q: C6H5ONa + CH3Br R: (CH3)3C-Cl+CH3ONa S: C6H5CH = CHCl + CH3ONa

Question

Which of the following on heating gives an ether as major products? P: C6H5CH2Br + CH3ONa Q: C6H5ONa + CH3Br R: (CH3)3C-Cl+CH3ONa S: C6H5CH = CHCl + CH3ONa (A) Both R and S (B) Both P and R (C) Both Q and S (D) Both P and Q

Tardigrade Admin · Accepted Answer

Primary alkyl halides/ benzyl halides react with alkoxide/phenoxide to give ethers via S N 2 mechanism. This reaction is known as Williamson's ether synthesis. Aryl halides are the least reactive as the C-X bond has a partial double bond characteristic and hence, does not cleave easily. 3° halides do not give ethers as they undergo elimination in the presence of a strong base like alkoxides.

Q. Which of the following on heating gives an ether as major products? P: C6​H5​CH2​Br+CH3​ONa Q: C6​H5​ONa+CH3​Br R: (CH3​)3​C−Cl+CH3​ONa S: C6​H5​CH=CHCl+CH3​ONa

Both R and S

Both P and R

Both Q and S

Both P and Q

Q. Which of the following on heating gives an ether as major products?
P: $C_{6} H_{5} C H_{2} B r + C H_{3} ON a$
Q: $C_{6} H_{5} ON a + C H_{3} B r$
R: $(C H_{3})_{3} C - Cl + C H_{3} ON a$
S: $C_{6} H_{5} C H = C H Cl + C H_{3} ON a$