Is there a city in the United States (or, for that matter, the world) where you would recommend someone move to without a job to get a job in chemistry?*
My short answer: no, there isn't. My longer answer: If you HAD to move some place without a job in order to look for work in science/chemistry, I would choose either Boston or San Francisco, but still seems really risky. You might be able to move into the pool of temporary workers, but it seems that temp pay probably doesn't cover the high rents.
Readers, what say you?
UPDATE, 11 AM 10232019: Anon10:21AM helpfully reminds me that there's such a thing as "the oil and gas industry"; I agree entirely.
*There was a while back where driving to Williston, North Dakota seemed like a great place to get a job and earn some money, but I don't think there were very many chemists there...