title: 2-(4-Bromo-benzo-yl)-1-ferrocenyl-spiro-[11H-pyrrolidizine-3,11'-indeno-[1,2-b]quinoxaline].
abstract: In the title compound, [Fe(C5H5)(C33H25BrN3O)], the fused four-ring system, 11H-indeno-[1,2-b]quinoxaline is essentially planar, with a maximum deviation of 0.087 (3) Å from the least-squares plane of the attached benzene ring. The pyrrolidine rings adopt envelope conformation and make a dihedral angle of 51.76 (19)° with each other. The cyclopentadiene rings of the ferrocenyl moiety have an eclipsed conformation. The Br atom deviates by 0.0190 (9) Å from the attached benzene ring. The mol-ecular structure features an intra-molecular C-H⋯N inter-action, which generates an S(8) ring motif. The crystal packing features C-H⋯O inter-actions, which generate R 2 (2)(18) centrosymmetric dimers, as well as C-H⋯π inter-actions.
authors.affiliation: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Sivasubramanian
authors.initials: S
authors.lastname: Suhitha
authors.affiliation: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Krishnaswamy
authors.initials: K
authors.lastname: Gunasekaran
authors.affiliation: Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Adukamparai Rajukrishnan
authors.initials: AR
authors.lastname: Sureshbabu
authors.affiliation: Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Raghavachary
authors.initials: R
authors.lastname: Raghunathan
authors.affiliation: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Devadasan
authors.initials: D
authors.lastname: Velmurugan