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Unlike other amines (RNH(2)), guanidine,...

Unlike other amines `(RNH_(2))`, guanidine, `H_(2)overset(..)N-underset(..)underset(NH)underset(||)C-overset(..)NH_(2)`
is a strong base because the cation formed by the addition of `H^(+)` has `"________"` equivalent contributing structures.

A

three

B

four

C

two

D

five

Text Solution

Verified by Experts

The correct Answer is:
A


This greatly stabilizes the conjugate acid making it very weak and the base strong.
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