Question

Which of the following groups will show the $+I$ effect?

• A. $-C{H}_2^{-}$
• B. $-N{F}_3^{+}$
• C. $-F$
• D. Cannot be predicted

Answer 1

The correct option is A $-C{H}_2^{-}$


The $I$ effect of $-H$ is considered to be zero. According to the figure, if a group is present towards the right side of $-H$ then it will show the $+I$ effect. And groups present towards the left of $-H$ will exhibit $-I$ effect.

Hence option (a) is correct.