rac-1-(4-tert-Butyl­phen­yl)-5-ethyl-4-ferrocenyl-5-hy­droxy-1H-pyrrol-2(5H)-one

The title compound, [Fe(C(5)H(5))(C(21)H(24)NO(2))], which is produced by the oxidation of 1-(4-tert-butyl­phen­yl)-2-ethyl-3-ferrocenyl­pyrrole, crystallizes as a racemic mixture in the centrosymmetric space group P2(1)/n. The central heterocyclic pyrrole ring system subtends dihedral angles of 13.7 (2)° with respect to the attached cyclo­penta­dienyl ring and of 43.6 (7)° with the major component of the disordered phenyl group bound to the N atom. The 4-tert-butyl­phenyl group, as well as the non-substituted Cp ring are disordered with s.o.f. values of 0.589 (16) and 0.411 (16), respectively. In the crystal, mol­ecules with the same absolute configuration are linked into infinite chains along the b-axis direction by O—H⋯O hydrogen bonds between the hy­droxy substituent and the carbonyl O atom of the adjacent mol­ecule.