Abstract
The title molecule, [ZrBr2(C12H14Si)], possesses a crystallographically imposed twofold rotational symmetry with the rotation axis passing through the Zr and Si atoms. The ZrIV 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 [(C5H4)2SiMe2]2− ligand contains noticeable η3-allyl and η2-olefin contributions.
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