Therefore, the excess electron pyrrole ring, while the nitrogen atom electron deficiency occurs the

Heterocyclic compounds with six members of the most common action dimension is pyridine. action dimension Pyridine has the same structure with benzene, in the form of a flat ring with five carbon atoms and one nitrogen atom. Every atom in the ring are sp 2 hybridized. Therefore pyridine having one nitrogen atom which is electronegative, the pyridine action dimension compounds are polar, action dimension whereas nonpolar action dimension benzene.
Pyridine can not be alkylated or acylated as in benzene by Friedel-crafts reaction. Pyridine can be substituted by bromine only at high temperature in the vapor phase so that the suspected reaction proceeds through formation of free radicals. Substitution reaction occurs at carbon position number 3.
Kuinolina is a heterocyclic ring which has a similar structure integrated naphthalene, but distinguished presence of the nitrogen atom at position 1 in the ring. The isokuinolina are positional isomers of kuinolina that have a nitrogen atom in the position-2. action dimension
Pyrrole, furan, action dimension and thiophene has 5 members in the ring and are aromatic. This is due to the nature of the aromatic ring of the five members in donating two electrons form a pi bond, as in benzene. Although pyrrole containing nitrogen atoms in the ring, but not alkaline as pyridine or other amines. action dimension This is due to the lone pair on the nitrogen atom has been donated to the ring to form a pi bond.
Therefore, the excess electron pyrrole ring, while the nitrogen atom electron deficiency occurs then the pyrrole partial polarization charge. Consequently, pyrrole is polar. Just as in benzene, aromatic compound which has five members can react through action dimension substitution reactions. Example:
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