title: Systematic assembly of the double molecular boxes: [Cs subset [CpCo(CN)(3)](4)[Cp*Ru](3)] as a tridentate ligand.
abstract: Cubic cage compounds composed of Co-CN-Ru linkages have been prepared which illustrate the following features: (i) new motifs for alkali metal ion complexation (i.e., cationic receptors for cations), (ii) a new family of triaza-metalloligands, and (iii) a double box-like cage. The cages are synthesized by the condensation of [CpCo(CN)(3)](-) and [Cp*Ru(NCMe)(3)](+) (cyclopentadienyl, Cp; pentamethylcyclopentadienyl, Cp*) the presence of Cs(+). The species [Cs subset[[CpCo(CN)(3)](4)[Cp*Ru](4)](+) and [Cs subset[[CpCo(CN)(3)](4)[Cp*Ru](3)[Cp*Rh]](2+) illustrate the box-completion reaction Cs subset Co(4)Ru(3) + M (M = Cp*Rh(2+), Cp*Ru(+)). With the naked ion precursors [Na(NCMe)(6)](+) and [Fe(NCMe)(6)](2+), the box-completion reactions afforded [Na[Cs subset[CpCo(CN)(3)](4)[Cp*Ru](3)]](2)](+) and [Fe[Cs subset [CpCo(CN)(3)](4)[Cp*Ru](3)]](2)](2+). These cages provide the first examples, to our knowledge, of the double-box motif.
authors.affiliation: Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Contakes
authors.forename: Matthew L
authors.initials: ML
authors.lastname: Kuhlman
authors.forename: Maya
authors.initials: M
authors.lastname: Ramesh
authors.forename: Scott R
authors.initials: SR
authors.lastname: Wilson
authors.forename: Thomas B
authors.initials: TB
authors.lastname: Rauchfuss
mesh_terms: D001952:Bridged-Ring Compounds / Q000737:chemistry*; D002412:Cations; D002586:Cesium / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003517:Cyclopentanes / Q000737:chemistry*; D008024:Ligands; D046911:Macromolecular Substances; D008956:Models, Chemical; D009942:Organometallic Compounds / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
chemical_list: C456274:(cesium subset(tricyanocyclopentadienylcobalt)4(pentamethylcyclopentadienylruthenium)3); D001952:Bridged-Ring Compounds; D002412:Cations; D003517:Cyclopentanes; D008024:Ligands; D046911:Macromolecular Substances; D009942:Organometallic Compounds; D002586:Cesium; D003035:Cobalt; D012428:Ruthenium