Chemical reaction (IMAGE) University of Münster Caption So-called nitrogen radical precursors (left) and carbon-carbon double bonds react with the help of light energy to form unsymmetrical diamines (right). Credit University of Münster - Glorius group Usage Restrictions The use of the image is only permitted in connection with this press release and with reference to the source. License Original 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.