Stability of following alkenes decrease as (1)-(4) Compound can't copy (a) 1>3>4>2 (b) 1>2>3>4 (

step 1 Question is stability of the following alkenes decreases as so we are going to discuss which wha

Stability of following alkenes decrease as (1)-(4) Compound...

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Key Concepts

Alkene Stability

Alkene stability is largely determined by the degree of substitution at the double bond. Generally, alkenes with more alkyl substituents on the double-bonded carbons are more stable, because alkyl groups donate electron density, thereby stabilizing the ?-bond.

Substituent Effects

The substituents attached to the double bond influence overall stability. More substituted alkenes benefit from both electron-donating effects and hyperconjugation, which help disperse charge and lower the energy of the molecule.

Hyperconjugation

Hyperconjugation is the stabilization that results when electrons in a sigma bond adjacent to a p-orbital or pi orbital delocalize into that orbital system. This effect increases with the number of adjacent alkyl groups, thus contributing to greater alkene stability.

Steric Hindrance

While additional substituents generally stabilize alkenes through hyperconjugation, steric hindrance can partially counteract this effect if bulky groups are positioned too closely. However, in most cases of simple alkene comparisons, the stabilization from increased substitution outweighs the destabilizing steric interactions.

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