[2-(2-{Bis[2-(1H-imidazol-2-ylmethyleneamino)ethyl]amino}ethyliminomethyl)imidazolido]cobalt(III) bis(tetrafluoridoborate) monohydrate.
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.
Atria
Ana María
AM
Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile.
Corsini
Gino
G
Talamilla
Arlyn
A
Garland
Maria Teresa
MT
Baggio
Ricardo
R
D003035:Cobalt / Q000737:chemistry*; D006860:Hydrogen Bonding; D008024:Ligands; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*
C534142:(2-(2-(bis(2-(1H-imidazol-2-ylmethyleneamino)ethyl)amino)ethyliminomethyl)imidazolido)cobalt(III); D008024:Ligands; D009942:Organometallic Compounds; D003035:Cobalt