CH-2240 Lecture Notes - Lecture 15: Pi Bond, Thiophene, Cyclic Compound
27 Nov 2017
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The plan of the molecule (benzene has 3 pairs) bonds aromatic. Chemistry energies: 2 criteria theory/calculated) with a compound with delocalized electrons delocalized electrons is than it would be if all its electrons were localized, determine delocalization energy by comparing stability of compound. Chapter 15 aromaticity reactions of benzene. 15. 1 aromatic compounds are unusually stable: delocalization energy tells us how much more stable a compounds with with localized electrons (usually a hypothetical molecule (experimental real molecule). Benzene has a large d. e: aromatic compounds compounds with unusually large delocalization. 15. 3 applying the criteria for aromaticity: annulenes monocyclic hydrocarbons with alternating single and double. 15. 4 aromatic heterocyclic compounds: heterocyclic compounds one or more of the ring atoms is something other than a carbon ex. 15. 5 some chemical consequences of aromaticity the form it normally exists in. 15. 7 a molecular orbital description of aromaticity and antiaromaticity. 15. 8 the nomenclature of monosubstituted benzenes: bromo, chloro, nitro, ethyl add before (cid:498)benzene(cid:499)
