1. Tardigrade
  2. Question
  3. Chemistry
  4. Guanidine, ( NH 2)2 C = NH, is said to be the strongest nitrogen containing organic base because:

Q. Guanidine, $\left( NH _{2}\right)_{2} C = NH$, is said to be the strongest nitrogen containing organic base because:

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Solution:

On the basis of hybridisation, $N \left(s p^{3}\right)$ of $NH _{2}$ with less $s$ character should be more basic than $N \left(s p^{2}\right)$ of the aimino $(= NH )$ group. However, $N$ of imino group is more basic and it is this nitrogen which is protonated because its conjugate acid is resonance hybrid of three equivalent structure which accounts its unusual stability.

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4. Which one of the following isomeric amines has the highest boiling point?

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5. The amine that reacts will Hinsberg's reagent to give an alkali insoluble product is :

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