The full catalog of Graduate-level Chemistry Course Offerings with course descriptions can be found on the official GT Catalog.

A listing of frequently offered Grad-level Chemistry Courses and the schedule by which they are offered can be found here. This schedule is unofficial and subject to change.

In addition to the list above, you can check using OSCAR for specific times/days when classes have been offered in the past. While the schedule can change in any given semester, previous class schedules can provide a rough estimate for future course schedules. Look for CHEM Courses for any semester prior to Spring 2020.