ansa-[(η5-(C5Me4)(η5-(C5H3-t-Bu)Hf]2-(μ-(N2C2O2) Molecule (S,S)-2-C1 with a bridging N2C2O24- Note: The Cp's with t-Butyl groups are anti and the C2 axis is lost when we assign the Ns and Os (below) Note: the N's and O's were originally unable to be differentiated, thus here they are colored lime green Through Experiment it was determined that the , D.J. Knobloch, S.P. Semproni, E.Lobkovsky, P.J.Chirik J. Am. Chem. Soc. Vol 134, 2012,