Baithak

So, I asked about Benzene ring story. And heres the answer for you - thats if you didn’t googled it (which I doubt) or you already knew about it (are you my sister?).

The empirical formula for benzene was long known, but its highly polyunsaturated
structure was challenging to determine. In 1865 the German chemist Friedrich
August Kekulé
published a paper in French (for he was then teaching in Francophone Belgium)
suggesting that the structure contained a six-membered ring of carbon atoms with alternating single
and double bonds. The new understanding of benzene, and hence of all aromatic
compounds, proved to be so important for both pure and applied chemistry that in
1890 the German Chemical Society organized an elaborate appreciation in Kekulé’s honor, celebrating
the twenty-fifth anniversary of his first benzene paper. Here Kekulé spoke of the
creation of the theory. He said that he had discovered the ring shape of the
benzene molecule after having a reverie or day-dream of a snake seizing its own
tail (this is a common symbol in many ancient cultures known as the Ouroboros). This vision, he
said, came to him after years of studying the nature of carbon-carbon bonds.

Benzen ring,

The ouroboros sign,

More: continued here
By Baithak.Net