# Why does BCF (boron carbofluoride) not exist?

$$\ce{BCF}$$ (boron carbofluoride, or carbon borofluoride, not to be confused with another so-called BCF molecule that has nothing to do with it) should exist as a vapor molecule with the bonds $$\ce{B≡C-F}$$, it's simple; but it doesn't seem to exist, or I can't find any information (I just found a heavy thesis where the $$\ce{H2··FCB}$$ theoretical molecule —with Van Der Waals forces— is computationally studied, but it turns to be quite unstable even with the help of $$\ce{H2}$$). Instead, other molecules like $$\ce{C2O}$$, $$\ce{FBO}$$, $$\ce{NCF}$$, vapor $$\ce{BN}$$, etc, do exist.

Why not $$\ce{BCF}$$ or $$\ce{BCCl}$$?

New contributor
Victor Graus is a new contributor to this site. Take care in asking for clarification, commenting, and answering. Check out our Code of Conduct.
• Even C=B-F would be much more viable. – Mithoron May 22 at 14:44
• @Mithoron You are right about C=B-F, now I've read a few papers which state that computationally it is 100 - 200 kJ/mol more favorable than BCF. Anyway even C=B-F seems to be quite unstable. So in your opinion, as a thought experiment, if we could engineer to obtain BCF, we would just get C=B-F? It's a sound idea. – Victor Graus May 23 at 19:16
• FCB molecule wouldn't survive perhaps even single collision with another FCB, and probably even H2 - instant addition on first occasion. Your FCB would be absurdly strong Lewis acid. – Mithoron May 23 at 19:34