Which of the following is meta directing group for benzene?

In the electrophilic substituion of benzene ring, the second substituent is directed by the group already present. Electron releasing groups (+I and +M) are ortho-para-directing and activating, whreas the electron withdrawing groups (-I and -M) are meta-directing and deactivating.

Why benzoic acid and benzaldehyde are meta directing groups?

In the case of Benzoic acid, since the -COOH group is an electron withdrawing group, because of resonance(-M effect), the carbon atoms at the ortho and para positions get a positive charge. Thus, the incoming electrophile is directed towards the meta positions.

Is carboxylic acid meta directing?

Meta directors have little electron density at the point of contact with the benzene ring. For example, a carboxylic acid is a meta director because it experiences resonance, a delocalization of electrons.

Is nh3 meta directing?

Although nh3 group is an ortho para directing yet the nitration of aniline gives meta nitro product in substantial amount meritnation.

Why is benzaldehyde a meta director?

Answer:With the exception of halogens, meta directors deactivate a benzene ring. In other words, they make the benzene ring less reactive, especially in an electrophilic aromatic substitution (EAS) reaction. …

Which of the following is meta directing group?

NO2 group is the electron withdrawing group due to which electron density in the ring decreases. Therefore meta positions are preferred over ortho / para positions.

Why carboxylic acids are meta directing?

Why is methyl group ortho directing?

Answer: (a) In toluene, methyl group is activating and ortho-para directing because it increases electron density at ortho and para positions.

Why is Anilinium ion meta directing?

The NH2 group in aniline is ortho and para guiding group because due to resonance, they will release electrons to the ring and at the same time remove the electrons towards themselves due to +1 impact from the aromatic ring. The substituent is called a meta directing group if the opposite is observed.