JEE Main 2017 · 8 Apr · Shift 1 · Chemistry Q59

← JEE Main 2017 · 8 Apr · Shift 1

ChemistrySingle correct+4 / -1Question 59 of 90

The major product of the following reaction is :
$\ce{C6H5CH2-C(CH3)(Br)-CH2-CH3 ->[C2H5ONa][C2H5OH]}$

\ce{C6H5CH2-C(CH3)(OC2H5)-CH2CH3}

\ce{C6H5CH=C(CH3)-CH2CH3}

\ce{C6H5CH2-C(CH3)=CHCH3}

\ce{C6H5CH2-C(=CH2)-CH2CH3}

Answer and worked solution

Official answer: B

Ethoxide with a tertiary bromide gives E2 elimination. Of the possible alkenes, $\ce{C6H5CH=C(CH3)CH2CH3}$ is trisubstituted and conjugated with the ring, so it is the most stable (Saytzeff) product.

Topics:Elimination reactions Alkenes

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JEE Main 2017 · 8 Apr · Shift 1, Chemistry question 59