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Question

Which of the following can be a conjugate system ?

A

π,πConjugation

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B

Positive charge,πConjugation

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C

Negative charge,πConjugation

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D

Lone pair,πcConjugation

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Solution

The correct option is D

Lone pair,πcConjugation


What do you mean by conjunction or conjugate position?

When can a system can be considered to be in a conjunction?

Alternate position of the molecule having π bond, positive charge, negative charge,odd electron or lone pair of electrons are known as conjugative positions.

Note: Compound having at least two conjugate positions is known as conjugated compound.

Type of conjugates

(|) π,πconjugation:If all conjugate position have π bomds,then conjugation is known as π,πconjugation

CH21=CHC3H=CH2

CH3CH2C1HCH=CHC5H=CH2

All of the above compounds have π,πconjugation.

(||) Positive charge ,πconjugation : In this case all conjugation positions have π bonds and only one conjugation position has positive charge. If this is the case,then conjugation is known as positive charge,πconjugation.


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