JEE Main · 2024 · 06 Apr 2024 · Shift 2 · Compounds Containing Nitrogen

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An amine ( X ) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains clear. Molar mass of the amine ( X ) formed is ______

g mol^{- 1}

.
(Given molar mass in

gmol^{- 1}

C: 12, H: 1, O: 16, N: 14 )

Answer: 287

Solution

Ammonolysis of benzyl chloride with excess ammonia can proceed past the primary and secondary amine to the tertiary amine, tribenzylamine

(PhCH_{2})_{3} N

; being tertiary, it gives no solid sulfonamide with p-toluenesulfonyl chloride and the solution stays clear (Hinsberg test). Molar mass

= 3 \times 91 + 14 = 287 g mol^{- 1}

(benzyl group

C_{7} H_{7} = 91

JEE Main · 2024 · 06 Apr 2024 · Shift 2 · Integer answer

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