# Elimination reactions of vicinal dibromide

When a vicinal dibromide undergoes elimination reactions in vigorous basic conditions, say in ammonia with $$\ce {NaNH2}$$, is the product an alkyne or is it a conjugated diene? I would think that the answer depends on thermodynamic and kinetic factors. Considering bond energies of the $$\ce {C-C}$$ $$\pi$$ bonds, perhaps the conjugated diene would be more favourably formed?

• That reaction isn't reversible, so it's not going to dependent on thermodynamic factors. – Zhe Jan 10 '19 at 16:09