Name a meta-orienting group.

Given an example of meta-directing group.

The nitro group is a very strong deactivating group Nitro benzene undergoes nitration at a rate only 10-4 times that of benzene. The nitro group is a meta-directing group. When nitrobenzene is nitrated with nitration mixture 93% of meta substituted product is formed. Ring deactivating groups are :

The nitro group is a very strong deactivating group Nitro benzene undergoes nitration at a rate only 10-4 times that of benzene. The nitro group is a meta-directing group. When nitrobenzene is nitrated with nitration mixture 93% of meta substituted product is formed. Ortho-para directing groups are

A third group is least likely to enter between two groups in the mta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attaching species. When a meta-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho to the meta directing group rather than para. Q.

Which of the following is not a meta-directing group in electrophilic aromatic substitution?