The numbers in this series are sometimes called “huckel numbers”. We can generate a series of numbers (2, 6, 10, 14) with this formula (4n+2) by using values of n. This integer must have a positive value, including zero. Huckel’s rule explains that the number of pi electrons in all planar aromatic compounds must be (4n+2), where n is not a property of a molecule and is an integer (n = 0, 1, 2, 3, 4,…). Pi number of electrons should be (4n+2) in all the aromatic compounds.Ī cyclic conjugated molecule must contain the correct number of pi electrons. Every atom in the ring must be capable of conjugation with each other.In other words, the organic compound should be flat. All atoms in the molecule should lie in the same plane, i.e., the molecule is planar.Cyclic structures are always found in aromatic compounds. Rules of Aromaticityįollowing are the rules for the aromaticity of chemical compounds: Examples of aromatic rings/aromatic compounds are double ringed bases (Purine) in DNA and RNA, Benzene and Benzene Reactions, Naphthalene, anthracene, furan, pyrrole etc. Non-benzene types of aromatic compounds also exist, but the most common are derivatives of benzene. The stability of aromatic compounds is impressive they are very hard to break, and their reactivity toward other substances is very good. It is a property of cyclic, planar molecular structures with resonating pi bonds. AromaticityĪromaticity is the property of aromatic compounds that give increased stability to the molecule because the electrons in the π orbitals can delocalize. Read on to know more about its definition, examples, criteria, importance, and much more. In this article, we will discuss the aromaticity of chemical compounds in organic chemistry.
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