Question

Identify the most acidic hydrogen. Which hydrogen would be abstracted first upon addition of a base?

a) H-A
b) H-B
c) H-C
d) H-D

Answer 1

Option (d) H-D would be abstracted first upon addition of a base as it has a more stable conjugate base, making it the most acidic hydrogen.

Step-by-step explanation:

The most acidic hydrogen is the one that would be abstracted first upon addition of a base. In this case, the answer would be option (d) H-D. This is because the hydrogen in option D is more acidic compared to the other options. To determine acidity, we look at the stability of the conjugate base. The more stable the conjugate base, the more acidic the hydrogen. Since option D has a more stable conjugate base, its hydrogen would be abstracted first upon addition of a base.