title: 3'-Ferrocenylcarbon-yl-1'-methyl-4'-phenyl-spiro-[indeno-[2,3-b]quinoxaline-11,2'-pyrrolidine].
abstract: In the title compound, [Fe(C(5)H(5))(C(31)H(24)N(3)O)], the pyrrolidine ring makes a dihedral angle of 86.3 (3)° with the mean plane [r.m.s deviation = 0.074 (2) Å] of the indeno-quinoxaline ring system. The central pyrrolidine ring adopts a twist conformation and the two cyclopentadienyl rings adopt an eclipsed conformation. In the crystal, mol-ecules are linked by weak C-H⋯N and C-H⋯π inter-actions, propagating along the c and a axes, respectively.
authors.affiliation: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Maraimalai (Guindy) Campus, Chennai 600 025,  India.
authors.forename: B
authors.initials: B
authors.lastname: Vijayakumar
authors.forename: D
authors.initials: D
authors.lastname: Gavaskar
authors.forename: T
authors.initials: T
authors.lastname: Srinivasan
authors.forename: R
authors.initials: R
authors.lastname: Raghunathan
authors.forename: D
authors.initials: D
authors.lastname: Velmurugan