Reversible Formation of a Polynickelocene (IMAGE) University of Bristol Caption This is a reversible formation of a polynickelocene from a moderately strained nickelocene-based monomer. Credit Manners Group, University of Bristol Usage Restrictions Single use only - please do not archive 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.