Producción Científica Profesorado

Structural and spectroscopic characterisation of tris(2-benzimidazolylmethyl)amine coordination compounds of Zn(II), Cd(II) and Hg(II)

Tapia Benavides, Antonio Rafael


Elba Quiroz-Castro, Sylvain Bernes, Noráh Barba-Behrens, Rafael Tapia-Benavides, Rosalinda Contreras, Heinrich Nöth, Structural and Spectroscopic Characterisation of tris(2-benzymidazolyl)amine coordination compounds of Zn(II), Cd(II) and Hg(II), Polyhedron, 19, 1479-1484 (2000). DOI:


Zinc(II), cadmium(II) and mercury(II) coordination compounds derived from tris(2-benzimidazolylmethyl)amine (ntb) were characterised by 1H and 13C NMR in solution, IR and X-ray single crystal diffraction for [Zn(ntb)Cl]2[ZnCl4]4EtOH, [Cd(ntb)(?2-NO3)]NO32DMSO and [Hg(ntb)Cl]2[HgCl4]4EtOH. The complexes derived from zinc(II), cadmium(II) and mercury(II) halides form [M(ntb)X]+ cations, where the metal ions are pentacoordinated and have a distorted trigonal bipyramidal geometry, with tetrahedral anions [MX4]2?. In the [Cd(ntb)(?2-NO3)]NO32DMSO complex, by analogy with the Zn(II) and Hg(II) compounds, the NO3 ? could be considered as the fifth apical substituent in a distorted trigonal bipyramid geometry. In all complexes the ligand is coordinated to the metal through the imidazolic nitrogen atoms and has a weak coordination with the tertiary amine. The counter ion (halide or nitrate) remains bonded to the metal ion in solution and in the solid state as was evidenced by NMR and X-ray diffraction. The structures presented interactions between the coordinated counterion and the nearest C?H of the aromatic rings. All cations show an approximate C3 symmetry. The distortions found in the solid state were attributed to intermolecular hydrogen bonding and stacking between the benzimidazolic rings of neighbouring molecules.

Producto de Investigación

Artículos relacionados


Acid-base equilibrium studies of 2-(aminomethyl)benzimidazolein aqueous solution

ChemInform Abstract: Syntheses of N-Substituted 2,5-Piperazindiones.

trans-Bis[2-(aminomethyl)-1H-benzimidazole-2N2,N3]aquacopper(II) dichloride dihydrate

Synthesis and structural studies of new N-(p-toluenesulfonyl)amino acid o-phenolamides

Three-center intramolecular hydrogen bonding in oxamide derivatives. NMR and X-ray diffraction study

Crystal structure, ferromagnetostructural behavior and evidence of cooperative JahnTeller interactio...

Structural study and antioxidant activity determination of (2E)-N-[2-(morpholin-4-yl)ethyl]-cinnamid...

Do Spiroarsoranes Exhibit Polytopal Equilibrium in Solution?

Hydrogen bond studies in substituted N-(2-hydroxyphenyl)--2-[(4-methylbenzenesulfonyl)amino]acetamid...