Complex sentence: It was first prepared in 1901 by Frédéric Swarts (the Belgian chemist who was the first to prepare CFCs in 1892) using the reaction of zinc with 1,1-difluoro-2-bromoethane.
Split into simpler sentences: It was first prepared in 1901 by Frédéric Swarts, the Belgian chemist who was the first to prepare CFCs in 1892. Swarts used the reaction of zinc with 1,1-difluoro-2-bromoethane.