How do you predict whether a compound will give a positive or a negative test with iron (II) chloride. Please explain

Question

anonymous · Answer

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aaronq · Answer

what do you mean a positive or negative test?

anonymous · Answer

The Iron( III) Chloride test is a common reagent used to test for the phenolic hydroxy group. Only phenolic -OH groups will give a positive reaction. We tested salicylic acid, synthesized aspirin, commercial aspirin and very old aspirin by adding 1ml Ethanol and 1 drop of 1%  Iron( III) Chloride  to each tube

aaronq · Answer

phenol has an aromatic ring, only one of those substances is aromatic

anonymous · Answer

thanks... i was confused b/c they both had an OH attached

aaronq · Answer

yep, one is not conjugated, the other is.