(μ2-Dinitrogen)-bis(bis(η5-tetramethylcyclopentadienyl)-zirconium) Structure 2-N2 Paper 40 , , J.A.Pool, E.Lobkovsky, P.J.Chirik Nature (London), Vol 427, p. 527, 2004, DOI 10.1038/nature02274 CCDC Entry 223980, CCDC Code ERIJAQ