Amines

Amines

Question

A compound with molecular mass 180 is acylated with CH3COCl to get a compound with molecular mass 390. The number of amino groups presents per molecule of the former compound is 

  • 2

  • 5

  • 4

  • 6

Answer

B.

5


Since,each-COCH3  group displaces one H atom in the reaction of one mole of CH3COCl with the one-NH2 group, the molecular mass increases with 42 units.
Since, the mass increases by (390-180) = 210, hence the number of -NH2
the group is 210/42 =5

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