Comparison (IMAGE) Osaka University Caption This is a comparison of the present Ni catalysis and previous Cu catalysis in the alkylation of butadiene: wavy lines indicate newly formed C-C bonds. Credit Osaka University 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.