Jacqueline Seyden-Penne, PhD, is Emeritus Director of Research at CNRS. From 1972 to 1991, she taught postgraduate organic chemistry at Orsay University in Paris, and she served as the head of a CNRS Research Unit at Orsay from 1983 to 1991. She has published more than 200 research papers in international journals and was scientific editor of the Bulletin de la Societe; Chimique de France and the Journal of Chemical Research. Dr. Seyden-Penne is an acknowledged international authority on carbanions and selective stereochemical methods in organic synthesis.