Explain meta direacting groups influencing in benzene.

1.	Explain meta direacting groups influencing in benzene.
Answer» SOLUTION :Meta directing groups: the groups which direct the incoming group to the meta position are CALLED meta directing groups. Examples: `- NO_(2), - CN, - CHO, - CO - COOH, - COOR and - SO_(3)H` let us discuss the directive influence of into group in nitrobenzene. Because of resonance EFFECT, electron density decreases at ortho and para positions in the BENZENE ring. Due to - I effect of the `NO_(2)` group also electron density of benzene ring decreases, hence, these groups are called deactivating groups. therefore, the electrophilic subsitution takes place to the comparatively electron rich meta position.

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