basic order

Asked by  | 21st Sep, 2012, 05:32: PM

Expert Answer:

Pyrrole is a very weak base with a pKa of about -1 to -2.
                  pKa
Pyrazole       14.0
Imidazole     14.5
Thiazole       2.5
Isoxazole     -3.0
 
pyrrole         -1 to -2
 
We know smaller Pka value means Stronger acidity or weak base and vice versa. So, imidazole and pyrazole are stronger bases.

Answered by  | 8th Dec, 2012, 09:08: AM

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