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Which of the following orders is not correct regarding the -I effect of the substituents ?? (a) -I (b) -N + R 3 + R 2 (C) -N + R 2 (d) -SR + R 2 The ans is given as (a) which i think is wrong it must be (d) Pls explain

Which of the following orders is not correct regarding the -I effect of the substituents ??


(a) -I<-Cl<-Br<-F
(b) -N+R3<-O+R2


(C) -N+R2<-OR<-F


(d) -SR<-OR<-O+R2


 


The ans is given as (a) which i think is wrong


it must be (d)


Pls explain


 


 

Grade:12

2 Answers

vikas askiitian expert
509 Points
10 years ago

order of electronegativity is F>Cl>Br>I , inductive effect directly proportional to

electronegativity of atom attached so in a) after F they have written Br which is not true..

AMIT KESHARWANI
41 Points
10 years ago

the correct ans should be I<Br<Cl<F because -I effect is shown by electron withdrawing group,it means -I is directly proportional to electronegativity.and since elecronegativity decreases from F to I so the correct ans will be I<Br<Cl<F

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