Hello
I know this may sound like a silly question, but I'm still quite confused about how it is possible to know where to place the methyl group/ halogen atom etc around a compound? For example a question may be "draw the structural isomer of butan-3-ol" but I wouldn't know where to place the OH group! Could it go anywhere on the compund or does it has to be on a specific carbon atom?
*sorry if I confused you