ya.. dats rit it s necessary to mention "1" when it has diff positional isomers..
if there r unique structure fr a cmp no need fr dat..
No.. not compulsory... because u can have no other structure for phenylethanone....
ya.. dats rit it s necessary to mention "1" when it has diff positional isomers..
if there r unique structure fr a cmp no need fr dat..
Give an example...
i read that.... if nothing is mentioned then it is in no.1 C position
Priyam ...can u give an example where "1" must be mentioned....