title: Crystal structures of di-μ-bromido-bis{di-bromido-[η5-2-(di-methyl-amino)-inden-yl]zirconium(IV)} and di-bromido-bis-[η5-2-(di-methyl-amino)-inden-yl]zirconium(IV).
abstract: In the title compounds, [Zr2Br6(C11H12N)2], (I) and [ZrBr2(C11H12N)2], (II), the positions of the η5-binding 2-di-methyl-amino-indenyl units are fixed by intra-molecular C-H⋯Br inter-actions involving aromatic or di-methyl-amino H atoms. The binuclear mol-ecule of (I) is located on a general position, while the mononuclear mol-ecule of (II) is situated on a twofold rotation axis. Both ZrIVatoms in (I) are ligated by one cyclo-penta-dienyl (CP) ring and four Br ligands (two bridging, two terminal), while in (II) the ZrIVatom is ligated by two CP rings and two terminal Br ligands. The crystal structures of both (I) and (II) comprise of strands of π-π- and N-π-bonded mol-ecules, which in turn are linked by C-H⋯Br inter-actions.
authors.affiliation: X-ray Structural Laboratory, A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilova St. 28, GSP-1, Moscow 119991, V-334, Russian Federation.
authors.forename: Michael G
authors.initials: MG
authors.lastname: Medvedev
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, Moscow 119991, Russian Federation.
authors.forename: Ilya S
authors.initials: IS
authors.lastname: Borisov
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, Moscow 119991, Russian Federation.
authors.forename: Pavel S
authors.initials: PS
authors.lastname: Kulyabin
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, Moscow 119991, Russian Federation.
authors.forename: Vyatcheslav V
authors.initials: VV
authors.lastname: Izmer
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, Moscow 119991, Russian Federation.
authors.forename: Dmitry S
authors.initials: DS
authors.lastname: Kononovich
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, Moscow 119991, Russian Federation.
authors.forename: Dmitry V
authors.initials: DV
authors.lastname: Uborsky
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, Moscow 119991, Russian Federation.
authors.forename: Alexander Z
authors.initials: AZ
authors.lastname: Voskoboynikov
keywords: crystal structure; organozirconium compounds; zirconium