JEE Main 2014 · 9 Apr · Shift 1 · Chemistry Q55

ChemistrySingle correct+4 / -1Question 55 of 90

Allyl phenyl ether can be prepared by heating :

\ce{C6H5Br + CH2=CH-CH2-ONa}

\ce{CH2=CH-CH2-Br + C6H5ONa}

\ce{C6H5-CH=CH-Br + CH3-ONa}

\ce{CH2=CH-Br + C6H5-CH2-ONa}

Answer and worked solution

Official answer: B

Williamson synthesis needs an alkoxide or phenoxide attacking an $S_N2$ -active halide. Allyl bromide + sodium phenoxide works.

Aryl and vinyl halides (options 1, 3, 4) do not undergo $S_N2$ .

JEE Main 2014 · 9 Apr · Shift 1, Chemistry question 55