Back when chemistry was just getting started and scientists were still trying to figure out the structures of molecules, benzene was a tough issue, probably bec

Back when chemistry was just getting started and scientists were still trying to figure out the structures of molecules, benzene was a tough issue, probably because folks could not make yet the mental leap to non-linear structures (closed loops). And then one night Kekule dreamed up the benzene ring, and the rest is history.