why-cyclohepta-1-3-5-triene-is-a-stronger-acid-than-azepine-even-though-the-elec

Question

Why is indene a stronger acid than indole even though the electronegativity of nitrogen is greater than that of carbon?

Accepted Answer

Indene is a stronger acid than indole because it gains aromaticity after deprotonation.

Answer

Indene is a stronger acid than indole because of the strong inductive effect of nitrogen.

Answer

Indene is a stronger acid than indole because of a more electron-deficient carbon atom.

Answer

Indene is a stronger acid than indole because azepine loses aromaticity after deprotonation.