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Question

In the following reaction, we are likely to get:

CH3ONa+Brt-Bu

A
ether
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B
alkene
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C
alcohol
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D
none of the above
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Solution

The correct option is A alkene

Both the substitution product and the elimination product are formed by competing for SN1 and E1 mechanisms. This is for two reasons:

Sodium methoxide is a strong base and a strong nucleophile
The leaving group (Br−) leaves behind a tertiary carbocation, which is more stable than primary or secondary carbocations.
As a result, there are two major products: tert-butyl methyl ether (SN1) and 2-methylpropene (E1).

Hence, the correct option is B

1459199_246990_ans_6b9a7ef8e7c8475c8cfd14459e6fc6f7.png

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