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Monday, January 27, 2020

Why benzene is reluctant to show addition reaction?

Benzene is reluctant to show addition reaction due to resonances its loses its pure double bond character rendering it partial single bond character to double bond and double bond character to single bond. This causes for reluctance of π-electrons to participate in addition reactions. Moreover addition reaction destroyes the aromaticity of the benzene molecule by affecting  π-cloud destruction.

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Sunday, January 26, 2020

Penta-1,3-diene is more stable than penta-1,4 -diene. Why?

In Penta-1,3-diene all the four carbon atoms having sp2 hybridised and in conjugation while in case of penta-1,4-diene one carbon between two double bonded carbon is sp3 hybridised hence de localisation not possible.

Related Questions:


Give an explanation for the fact that Guanidine NH=C(CH3)2 is a stronger base than most of amines?

Phenoxide ion is more stable than an alkaoxide. why?


Phenoxide ion is more stable than alkaoxide because phenoxide ion stabilised by resonance  whereas alkaoxide ion does not resonance stabilised .

Alkynes are more reactive than alkynes towards addition reaction but the opposite is true in case of catalytic hydrogenation. Why?