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Question

Propene is allowed to react with B2 D6 and the product is treated with acetic acid. The final product obtained is:

A
1-deuteriopropane
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B
2-deuteriopropane
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C
1-deuteriopropene
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D
2-deuteriopropene
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Solution

The correct option is D 2-deuteriopropane
this is an example of hydroboration reaction (followed by hydrolysis) in which diborane is isotopically labeled.
A molecule of HD is added across the double bond of propene to form 2-deuteriopropane.
CH2CHCH3B2D6−−−−−−CH3COOHCH3CHDCH3

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