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Which of the following should be most vo...

Which of the following should be most volatile?
`(I) CH_(3)CH_(2)CH_(2)NH" (II) "(CH_(3))_(3)N`
(III) (IV) `CH_(3)CH_(2)CH_(3)`

A

II

B

IV

C

I

D

III

Text Solution

Verified by Experts

The correct Answer is:
B
`1^(@) and 2^(@)` amines due to intermolecular hydrogen bonding have higher boiling point and hence less volatile than `3^(@)` - amines and hydrocardons of comparable molecular mass. Due to polar `C-N` bonds. `3^(@)-` amines are more polar than nonpolar hydrocarbons. Therefore, due to weak dipole - dipole interaction, `3^(@)` - amines have higher boiling points and hence less volatile than hydrocarbons. Thus, `CH_(3)CH_(2)CH_(3)` has the least boiling point and hence is most volatile.
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