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  4. An alkane C7H16 is produced by the reaction of lithium dipentyl cuparate with ethyl bromide. The structural formula of the product is:

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Q. An alkane $ {{C}_{7}}{{H}_{16}} $ is produced by the reaction of lithium dipentyl cuparate with ethyl bromide. The structural formula of the product is:

KEAMKEAM 2000

Solution:

When lithium dipentyl cuparate reacts with ethyl bromide, it will give n-heptane. This reaction is called Corey-House reaction. $ {{(C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}})}_{2}}CuLi+C{{H}_{3}}C{{H}_{2}}Br $ $ \xrightarrow[{}]{dryether}\underset{n-heptane}{\mathop{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}}}\, $ $ +C{{H}_{3}}C{{H}_{2}}Cu+LiBr $