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Compound which shows positive mesomeric ...

Compound which shows positive mesomeric effect

A

`CH_(2) = CH - Cl`

B

`C_(6) H_(5) - N - Me_(3)`

C

`CH_(2) = CH - CH_(2) Cl`

D

`C_(6) H_(5) - CH = CH Cl`

Text Solution

Verified by Experts

The correct Answer is:
A, D
The groups which donate electrons to the double bond or to a conjugated system are said to have +M effect or +R effect, e.g.

This criteria is fulfilled by options (a) and (d) only.
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