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In the solid state, molecules of 1,1'-dibenzoylferrocene, [Fe(C12H9O)2], (I), are linked to form infinite chains in the [100] direction via (cyclopentadienyl)C-H...O hydrogen bonds [C...O 3.354 (4) Å]. In the structure of (4-nitrophenyl)ferrocene, [Fe(C5H5)(C11H8NO2)], (II), there are no C-H...O hydrogen bonds and molecules are separated by normal van der Waals distances. For earlier determinations see Struchkov [Dokl. Akad. Nauk SSSR (1956), 110, 67-70] for (I) and Roberts et al. [J. Chem. Soc. Dalton Trans. (1988), pp. 1549-1556] for (II).

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks global, I, II

hkl

Structure factor file (CIF format)
Contains datablock I

hkl

Structure factor file (CIF format)
Contains datablock 9759gaus

CCDC references: 129492; 129493

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