Question

Define hyper conjucation effect

Answer 1

In the formalism that separates bonds into σ and π types, hyperconjugation is the interaction of σ-bonds (e.g. C-H, C-C, etc.) with a π network.

This interaction is customarily illustrated by contributing structures, e.g. for toluene (below), sometimes said to be an example of "heterovalent" or "sacrificial hyperconjugation", so named because the contributing structure contains one two-electron bond less than the normal Lewis formula for toluene.

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Answer 2

Answer:

In organic chemistry, hyperconjugation (or σ-conjugation) refers to the delocalization of electrons with the participation of bonds of primarily σ-character. ... Increased electron delocalization associated with hyperconjugation increases the stability of the system.