Question:
How many amines with molecular formula C$_3$H$_9$N can react with benzene sulphonlyl chloride?
How many amines with molecular formula C$_3$H$_9$N can react with benzene sulphonlyl chloride?
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Primary and secondary amines react with benzene sulphonyl chloride in the Hinsberg test, while tertiary amines do not.
Updated On: Jun 4, 2025
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- 3
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The Correct Option is B
Solution and Explanation
Step 1: Understand the structure C$_3$H$_9$N. This molecular formula corresponds to primary and secondary amines with 3 carbon atoms. Possible structures include:
- CH$_3$CH$_2$CH$_2$NH$_2$ (1° amine)
- (CH$_3$)$_2$CHNH$_2$ (1° amine)
- CH$_3$CH$_2$NHCH$_3$ (2° amine)
Step 2: Reactivity with benzene sulphonyl chloride. Only primary and secondary amines react with benzene sulphonyl chloride in the Hinsberg test.
Conclusion: Among all structural isomers of C$_3$H$_9$N, 3 are reactive (2 primary and 1 secondary). Tertiary amines do not react under these conditions.
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