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287. A substance (X) has a molecular formula C₃H₉N. This substance gives a unpleasant smell with chloroform and caustic potash. Write the structure of this organic substances (X). Write their IUPAC names also.

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288. A compound (X) having molecular formula C₃H₇NO, reacts with bromine and caustic soda to give another compound (Y). The compound (Y) reacts with HNO₂ to form alcohol and nitrogen gas. Identify the compounds (X) and (Y) and write the chemical equations of the reactions involved.

As the compound (X) is giving a positive Hoffmann bromamide reaction, the compound (X) contains the CONH₂ group. As only three carbons present, the structure of compound (X) is:
(X) → CH₃CH₂CONH₂Hoffmann bromamide reaction give 1° amine with one carbon less, therefore, the structure for compound (Y) is:
(Y) → CH₃CH₂NH₂The reaction involved are: