Description : What are the positional isomers of dihydroxybenzoic acids, there should be 6 positional isomers I do not know what. Thank you very much for your help.
Last Answer : 2,3 ... 2,4 ... 2,5 ... 2,6 ... 3,4 ... 3,5 other options are already mirrored 3,6 = 2,5 4,5 = 3.4 4.6 = 2.4 5.6 = 2.3