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Q. What are the starting materials to get $2$-methylpropene as the major product?

KEAMKEAM 2012Haloalkanes and Haloarenes

Solution:

Alkoxide ions are both powerful nucleophiles and bases. Thus, when they are treated with a tert alkyl halide, they bring its dehydrohalogenation resulting in the formation of alkene. Hence, the alkyl halide taken must be tertiary.

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