Organic Chemistry Some Basic Principles And Techniques Ques 59
59. Which one of the following order is correct regarding the $-I$ effect of the substituents ?
[1998]
(a) $-NR_2<- OR >-F$
(b) $-NR_2>-OR>-F$
(c) $-NR_2<- OR <- F$
(d) $-NR_2>-OR<-F$
Show Answer
Answer:
Correct Answer: 59.(c)
Solution:
- (c) As electronegativity of $N, O$ & $F$ follow the order $N<O<F$ hence based upon electronegative character order of $-I$ effect is $-NR_2<-OR<- F$.
The atom or group which has more power to attract electrons in comparision to hydrogen is said to have $-I$ effect. Thus higher the electronegativity of atom, stronger will be the $-I$ effect.
BETA
