If you are trying to register for a section of my CHEM 232 or CHEM 233 course but can't get it, keep trying especially during the first week. In both courses, several students drop during the first week. Once they've dropped that spot will be immediately open. There are no waiting lists; registration is first-come-first-serve. While you won't be able to attend a discussion section or lab section until you're registered, you're more than welcome to attend the lecture for CHEM 232 while you're trying to register.
I do not have any control over class enrollment numbers and neither I nor the chemistry department can override enrollments for CHEM 232 or CHEM 233. These are strictly controlled by the timetable office based on the number of seats available in the discussion section classrooms and laboratories.