Highly Electron-Deficient (IMAGE) Université de Genève Caption Highly electron-deficient, dark blue holes appear on the surface of sulfur atoms in the SF2 molecule, and on one of the best of the 'sulfurous' catalysts created by Professor Matile's group. Credit ©UNIGE Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.