Oxidation (IMAGE) Southern Methodist University Caption Upon mixing the reactants (copper + ligand + hydrogen peroxide + carbon-hydrogen substrate) the starting colorless solution turns green-blue, indicating that an oxidative process is occurring. Credit SMU Usage Restrictions Please credit 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.