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The title mol­ecule, [ZrBr 2 (C 12 H 14 Si)], possesses a crystallographically imposed twofold rotational symmetry with the rotation axis passing through the Zr and Si atoms. The Zr IV  centre is in a distorted tetra­hedral environment defined by two Cp rings of chelating organic ligands and two Br anions. Two five-membered rings form a dihedral angle of 59.7 (2)°. Unequal Zr—C bonds [2.471 (3)–2.556 (3) Å] in the mol­ecule indicate that the inter­action of the central metal with the [(C 5 H 4 ) 2 SiMe 2 ] 2−  ligand contains noticeable η 3 -allyl and η 2 -olefin contributions.

Dibromido[bis(η5-cyclopentadienyl)dimethylsilane]zirconium(IV)

Dibromido[bis(η⁵-cyclopentadienyl)dimethylsilane]zirconium(IV)