N,N'-Butane­dioylbis(5-ferrocen­yl-3-meth­yl-1H-pyrazole)

The title compound, [Fe₂(C₅H₅)₂(C₂₂H₂₀N₄O₂)], has been synthesized by the reaction of ferrocenoylacetone and butane­dioic acid dihydrazide in ethanol. The dihedral angles between one pyrazole ring and the attached cyclopentadienyl ring and carbonyl plane are 33.5 (4) and 4.4 (8)°, respectively; for the other pyrazole ring, the corresponding angles are 29.5 (4) and 11.2 (8)°, respecively.