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why can’t we write the structure of 1-chloro-2-methyl benzene as 2-chloro-1-methyl benzene?

why can’t we write the structure of 1-chloro-2-methyl benzene as 2-chloro-1-methyl benzene?

Grade:12

3 Answers

Ayush_Deep
120 Points
3 years ago
The numbers allotted to the substituent are based on alphabetical order . since , C comes first so we allot first position to chlorine
Vikas TU
14149 Points
3 years ago
Dear student 
We can write it as 
Toluene, o-chloro-; o-Chlorotoluene; o-Tolyl chloride; 1-Methyl-2-chlorobenzene; 2-Chloro-1-methylbenzene; 2-Chlorotoluene; 1-Chloro-2-methylbenzene; ortho-Chlorotoluene; Halso 99; 2-Methylchlorobenzene; NSC 8766
Yashraj
908 Points
3 years ago
if two substituent are connected to benzene then we follow alphabetical order so c comes first hence cl is alloted number 1

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