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
Solution
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
the group is 210/42 =5
