harley,,,are you talking about general chemistry,,,just enough to pass the basic freshman college class, or are you talking about being an expert?
there are several branches of chemistry, analytical, inorganic, organic, physical, etc.
to be an expert at any one of these, yes you basically have to be a genius. a ph d would be considered an expert in whatever they did their research on to get their degree.
to get to this level, not only would you have to be of near genius level intelligence, but you would also have to spend several years ( more than 6) from where you are now, studying diligently about one specific thing to become that expert
hope this helps