state and explain huckles rule of aromaticity
Answers
Answer:
Explanation:
In 1931, German chemist and physicist Erich Hückel proposed a theory to help determine if a planar ring molecule would have aromatic properties. His rule states that if a cyclic, planar molecule has 4n+2 π electrons, it is considered aromatic. This rule would come to be known as Hückel's Rule
The three rules of aromaticity are useful in predicting whether a particular compound is aromatic or non-aromatic.
(1) Aromatic compounds are cyclic and planar (all atoms in ring are sp^2 hybridized.)
(2) Each atom in aromatic ring has a p-orbital. The p-orbitals must be parallel so that continuous overlap is possible around the ring
(3) The cyclic molecular orbital formed by overlap of p-orbitals must contain (4n+2) p electrons, where n integer 0, 1, 2, 3, etc