SELECT * FROM question_mgmt as q WHERE id=3089 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=9 AND chapterId=54 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 11th chemistry Hydrocarbons why is benzene extra ordinarily stable though it c

Question:

Why is benzene extra ordinarily stable though it contains three doublebonds?

Answer:

Benzene is a hybrid of resonating structures given as:

Benzene is a hybrid of resonating structures. All six carbon atoms in benzene are sp2 hybridized. The two sp2 hybrid orbitals of each carbon atom overlap with the sp2 hybrid orbitals of adjacent carbon atoms to form six sigma bonds in hexagonal plane. Left sp2 hybrid orbital on each carbon atom overlaps with the s-orbital of hydrogen to form six sigma C-H bonds. Left unhybridized p-orbital of carbon atoms has the possibility of forming three π bonds by the lateral overlap of  C1 - C2,  C3- C4,  C5 - C6, or  C2 - C3,  C4-C5, C6-C1.

The six π's are delocalized and can move freely about the six carbon nuclei. Even after the presence of three double bonds, these delocalized π-electrons stabilize benzene.


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