Steric Inhibition Protection

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 resonance , the p-position of (II) is not sufficiently activated fro the coupling reaction.

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).

Inhibition of hexokinase by glucose-6-phosphate is an example of allosteric inhibition. This inhibition occurs due to increase in:

The hormone which inhibits bone resorption is/are

Cyanide causes irreversible inhibition of cytochrome oxidase. It