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Explain that, unlike other amines (RNH(2...

Explain that, unlike other amines `(RNH_(2))`, guanidine, `(H_(2)N-underset("NH")underset("|| ")"C "-NH_(2))` , is a strong base.

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The cation fomed by the addition of `H^(+)` has three equivalent contributing strucutres. This greatly stabilizes the conjugate acid making it very weak and so a strong base.
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