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cool_kaush

What is d hybridisation of N- in pyrrole?

and why?

rajat

i think it is sp3.

cool_kaush

no its not sp3 --

i thnk its sp2 but i want 2 knw y??

cool_kaush

coz if its sp2. then it vil have d unpaired electrons in a p-orbital..

khyatigupta

Ya, N will have sp2 hybridisation since it has three sigma bonds and the lonepair will be in p-z orbital.

taruntanuj007

sorry but the lone pair can be inany orbital all px py pz orbitals r degenerate so and 1more thing it cant be sp2 coz lone pair in involved in resonance so it has to be sp2 ..............

smriti.mathur

In Pyrrole, the four carbons and nitrogen are sp² hybridised.The two sp² orbitals of the adjacent ring atoms overlap to form sp² - sp²

framework. The third sp² orbital of each atom overlaps with orbital of a hydrogen to form sp² - s

bonds. Each of the four carbons has an unused p- orbital containing one electron, which lies at right angles to the plane of the pentagonal ring system. The p- orbital of nitrogen containing a lone pair of electrons also stands at right angles to the plane of the ring. The four p- orbitals of carbon and p-orbital of nitrogen overlap sidewise to form a 6 pie molecular orbital. The delocalized six pie electrons are referred to as the aromatic sextet. The stabilization of the ring system due to delocalization of the 6 pie electrons causes it to be aromatic.The resulting pie molecular orbital satisfies the Huckel's (n = 1 in 4n + 2) which shows that pyrrole is aromatic.

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