Decamethylzirconocene dichloride is an organozirconium compound with the formula Cp*<sub>2</sub>ZrCl<sub>2</sub> (where Cp* is C<sub>5</sub>(CH<sub>3</sub>)<sub>5</sub>, derived from pentamethylcyclopentadiene). It is a pale yellow, moisture sensitive solid that is soluble in nonpolar organic solvents. The complex has been the subject of extensive research. It is a precursor to many other complexes, including the dinitrogen complex [Cp*<sub>2</sub>Zr]<sub>2</sub>(N<sub>2</sub>)<sub>3</sub>). It is a precatalyst for the polymerization of ethylene and propylene.