# Can a substance donate a proton without the proton getting accepted by another substance? [duplicate]

I have read that the concept of Brønsted and Lowry is based on the fact that acid-base reactions involve the transfer of $\ce{H+}$ ions from one substance to another, and that an acid is a substance that donates a proton to another substance, but:

can a substance donate a proton without the proton getting accepted by another substance? So for example: $$\ce{AH -> A- + H+}$$ without reacting with another substance?

If yes: Is this a Brønsted-Lowry acid?

• The process itself should be possible depending on the nature of A. Kind of photolysis. But in absence of media it will go reverse. Nothing in common conditions.... – Alchimista Jan 1 '18 at 15:24
• – Mithoron Jan 1 '18 at 16:32

• Yes, some bonding interaction (in this case between the protons and lone pairs on nitrogen atoms in the base) to drive the "reversed" oxidation states. But you avoid the usual localized covalent bonding, the encapsulated species may be fairly called ironically bonded $\ce{H^+}$. – Oscar Lanzi Jan 1 '18 at 14:26