In this post, everything about steric inhibition of resonance is explained. What is steric inhibition of resonance effect? SIR stands for Steric Inhibition in Resonance. As per its name, steric means size, inhibition means some kind of hindrance and resonance means delocalisation or conjugation. We know that the planarity is the main condition for resonance […]

What is sigma resonance or dancing resonance? Sigma resonance or dancing resonance is a special stability mechanism which increases stability of carbocations attached directly to the three membered rings, e.g., cyclopropylmethyl carbocation. Why it occurs? In cyclopropane, all the carbon is sp3 hybridized and the bond angle for the same should be 109°28′, but the

Phenol and phenoxide ion both are stabilized by resonance. In case of phenol, the lone pair on oxygen atom get delocalize over the benzene ring and this causes a charge separation, i.e., positive charge on oxygen atom while negative charge is on the benzene ring. This type of resonance structures have small contributions to the

Question: The order of heat of hydrogenation in the following compounds: Solution:   Read more: The correct relation between the bond lengths a and b is:

SN1 and SN2 products are same with (excluding stereoisomer): (a) In SN1 reaction, rearrangement of carbocation occurs, so it gives different product in SN1 reaction than SN2. (b) The given halide is tertiary, so here SN1 reaction is possible but SN2 is not possible due to steric hindrance. (c) Here secondary halide is given, it