is pyrrole aeromatic?

Answer 1

Simply aromaticity can be defined as ' a cyclic compound that obeys Huckel's rule (4n + 2) pi rule' or aromaticity is related to the presence of a closed loop of electrons, the aromatic sextet(aromatic compounds are thus examples of delocalised bonding)

In the case of Pyrrole, it is a five membered ring which has two double bonds. The fifth atom (heterogeneous atom - other than carbon, here nitrogen) possesses an unshared pair of electrons, which in conjution with the double bond makes pyrrole an aromatic compound. 4n + 2 pi rule is satisfied here. since the total no. of electrons present in the ring is 6 (4 from the two double bonds and 2 from the lone pair of the heterogeneous atom- nitrogen)

Answer 2

Yes, pyrrole is aromatic. It is a heterocyclic aromatic compound because of the nitrogen, but the free electron pair that the nitrogen has are able to delocalize within the empty p-orbitals of the four carbon atoms in the ring.

Answer 3

For a molecule to be aromatic, the following are the characteristics:
1. has to be a ring
2. has to have (4n+2)pi electrons, where n is the number of rings.
3. has to be planar.
4. has to have resonance structures.

So, pyrrole, having a ring structure, 6pi electrons, resonance canonical forms and a planar structure, is AROMATIC.

It's not necessary that the compound has to look exactly like benzene - there's an aromatic substance called "FERROCENE", which looks like a sandwich - 2 cyclopentadienyl rings above and below a Fe2+ ion.

Thanks.

Answer 4

Look at the structure. Any time you seee a benzene ring, 6 carbons in a ring with 3 single bonds and 3 double bonds, also represented as a circle within a hexagon, it is aromatic.

Answer 5

no,it is not aeromatic.it is a colourless liquid heterocyclic compuond ,b.p103 c,found in coal tar.