Crystal structure of 1,1′-bis(2-methoxycarbonyl-2-methylpropyl)ferrocene

The Fe atom in the title ferrocene derivative, [Fe(C11H15O2)2], is situated on an inversion centre. As a result of the point-group symmetry -1 of the molecule, the ferrocene moiety adopts a staggered conformation. The average Fe—C(Cp) bond length (Cp is cyclopentadienyl) is 2.045 (4) Å, in agreement with that of other disubstituted ferrocenes. The Fe—C bond length involving the substituted C atom is slightly longer [2.0521 (17) Å] than the remaining Fe—C bond lengths caused by the inductive effect of the methylene group on the Cp ring. Apart from van der Waals forces, no significant intermolecular interactions are observed in the crystal packing.

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