Complex sentence: In 1993, Deripaska graduated with honors in physics from Moscow State University; however, the collapse of the Soviet Union greatly eliminated academic funding and made it impossible for him to continue his studies as a theoretical physicist.
Split into simpler sentences: In 1993, Deripaska graduated with honors in physics from Moscow State University. After graduation from Moscow State University, the collapse of the Soviet Union eliminated academic funding and made it impossible for Deripaska continue to his studies as a theoretical physicist.