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Steric Inhibition Protection...

Steric Inhibition Protection

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Steric Inhibition of Resonance

Which of the following compound will not show steric inhibition of resonance?

Maximum extent of steric inhibition of resonance can be expected in

Assertion: Salicyclic acid is much strogest than its m-p -isomers and benzoic acid itself. Reason: It is due to steric inhibitation to resonance, as -OH group forces -COOH out of the plane of ring.

Assertion (A) : Ph overset (o+)(N_2) Br^(Θ) couples with N, N -dimethyl aniline (I) but not with 2,6, -dimethyl- N,N -dimethuyl aniline (II) Reason (R ): Due to steric inhibition of resonce , the p-potion of (II) is not sufficiently activated fro the coupling reation. Due to steric inhibition of resonamne, the p-position of (II) is not sufficiently activated for the coupling reaction.

Steric inhibition is not applicable in :

Assertion (A): 2,6-Dimethyl-4-nitrophenol (I) is more acidic than 3,5-dimethyl-4-nitrophenol (II). Reason (R ): It is due to the steric inhibition of the resonance of (-NO_(2)) group with two (Me) groups in (II).

Define inhibition.

Allosteric inhibition involves