Question

Which of the following set of functional groups is meta-directing?

• A. $- NO _{2},- NH _{2},- COOH ,- COOR$
• B. $- NO _{2},- CHO ,- SO _{3} H ,- COR$
• C. $- CN, - CHO, - NHCOCH _{3},- COOR$
• D. $- CN ,- NH _{2},- NH R,- OCH _{3}$

Answer 1

Answer: (B)

The groups which direct the incoming group to meta-position are called meta-directing groups.
Some examples of meta -directing groups are $- NO _{2}$, $- CN ,- CHO ,- COR ,- COOH ,- COOR$, $- SO _{3} H$ etc.