This collection documents George C. Pimentel's career in the field of chemistry. It includes information on his research, teaching, public service, travel and meetings, and engagement in the community of the University of California at Berkeley. Of particular interest are materials regarding his lobbying in Congress for science funding, his research on and involvement in the Mariner 6 and 7 expeditions, development of the chemical laser, research on matrix isolation, and the publication of "The Pimentel Report". Materials include: biographical information, research notes and data, correspondence, meeting records, lecture notes, drafts of publications, and article reprints.