Question : In 1931, who recognised that an aromatic compound must have an odd number of pairs of electrons, which can mathematically be written as 4n+2 (n = 0,1,2,3 etc.)?
Option 1: Antoine Lavoisier
Option 2: Erich Hückel
Option 3: Auguste Laurent
Option 4: Jacob Berzelius
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Correct Answer: Erich Hückel
Solution : The correct option is Erich Hückel .
A theory to ascertain if an aromatic molecule would be present in a planar ring molecule was put forth by the German physicist and chemist Sir Erich Hückel in 1931. According to his criteria, an aromatic molecule is cyclic and planar and possesses 4n+2 π electrons.
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