Preparation and crystal structure of a cationic olefin polymerization precatalyst: (1,7-bis(2,6–dichlorophenyl)-1,7-di-aza-4-oxo-heptan-1,4,7-triyl)dimethyl zirconium(IV), C<sub>18</sub>H<sub>20</sub>Cl<sub>4</sub>N<sub>2</sub>OZr
Zeitschrift für Kristallographie. New crystal structures/Zeitschrift für Kristallographie. New crystal structures