title: [2-(2-{Bis[2-(1H-imidazol-2-ylmethyleneamino)ethyl]amino}ethyliminomethyl)imidazolido]cobalt(III) bis(tetrafluoridoborate) monohydrate.
abstract: The title compound, [Co(C(18)H(23)N(10))](BF(4))(2) x H(2)O, is the result of complexing a Co cation (initially in a Co(II) state) with tris[2-(1H-imidazol-2-ylmethyleneamino)ethyl]amine (L), obtained by a condensation process involving imidazole-2-carbaldehyde and tris(2-aminoethyl)amine. Both the Co cation and the ligand were modified in the synthesis process, the cation via oxidation to Co(III), and the ligand via deprotonation to convert it into the 2-(2-{bis[2-(1H-imidazol-2-ylmethyleneamino)ethyl]amino}ethyliminomethyl)imidazolide anion (L(-)). The ligand chelates the metal centre in a hexadentate fashion, forming a slightly distorted octahedral CoN(6) chromophore. Packing is governed by N-H...N hydrogen bonds defining zigzag chains. A similar structure in the literature is discussed, and the wrong assignment of the oxidation state, given therein to the Co cation, is corrected.
authors.affiliation: Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile.
authors.forename: Ana María
authors.initials: AM
authors.lastname: Atria
authors.forename: Gino
authors.initials: G
authors.lastname: Corsini
authors.forename: Arlyn
authors.initials: A
authors.lastname: Talamilla
authors.forename: Maria Teresa
authors.initials: MT
authors.lastname: Garland
authors.forename: Ricardo
authors.initials: R
authors.lastname: Baggio
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D006860:Hydrogen Bonding; D008024:Ligands; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: C534142:(2-(2-(bis(2-(1H-imidazol-2-ylmethyleneamino)ethyl)amino)ethyliminomethyl)imidazolido)cobalt(III); D008024:Ligands; D009942:Organometallic Compounds; D003035:Cobalt