Ronald J. Gillespie is Emeritus Professor of Chemistry at McMaster University in Ontario, Canada, where be has taught inorganic chemistry and general chemistry for over thirty years. He is internationally known for his work in fluorine chemistry and superacid chemistry and has received many prizes and awards for his work. He is a Fellow of the Royal Society of Chemistry, the Royal Society of Canada, and the Royal Society of London. Dr. Gillespie has published several books on freshman chemistry and on molecular geometry and over 350 papers in research journals. He is particularly well known for his VSEPR model of molecular geometry.
Paul L.A. Popelier is Lecturer of Physical Chemistry at the University of Manchester Institute of Science and Technology, UK. He is the author of Atoms in Molecules: An Introduction (2000) and the computer program MORPHY. He is also a member of the Royal Society of Chemistry.