Imidazole Complexes of Nickel(II), Copper(II), Zinc(II), and Silver(I)

Abstract

The site of complex formation of the imidazole molecule has been determined to be the pyridine nitrogen by comparing data on the N-methylimidazole complex with the imidazole complex of Ag(I). The preparation and characterization of a dual system of imidazole and imidazolate complexes is presented for Ni(II), Cu(II), Zn(II), and Ag(I). Total heats of formation of these complexes have been determined.

Complexes of Silver with Histidine and Imidazole Investigated by the Calorimetric and Potentiometric Methods

“…(1) and (2)); the values measured calorimetrically (this work and Ref. [3]) and calculated from the results of a potentiometric experiment [7]. experimental data.…”

“…To the best of our knowledge, the complexing enthalpies have never been reported. Although the information about the complexes with imidazole might seem ample [1,2], only one set of enthalpies measured directly is available [3].…”

‘Silver bullets’ in antimicrobial chemotherapy: Synthesis, characterisation and biological screening of some new Ag(I)-containing imidazole complexes

“…3.4 Å ) and a further long interaction (2.9702(14) Å ) between the Ag(I) centre and an adjacent phenolic oxygen atom (Fig. 3) reaction mixture [16,18]. Ionisation of imH to im À changes the monodentate imH lig into the bifunctional im À ligand and X-ray powder diffraction studies [18] 6 forms from AgClO 4 and imH in water containing added perchloric acid [19] and the large cation comprises a planar (Ag + ) 6 cluster, in which three radiating pairs of Ag + ions (3.051 ( …”

Magnetic Properties of Polymorphic Cu(C3H3N2)2 Complexes

“…The transition metal (M) cations such as Co 2+ , Ni 2+ , Cu 2+ and Zn 2+ and imidazole (Im) anions (C 3 H 3 N 2 ) − form a family of organic polymers of the formula [M(C 3 H 3 N 2 ) 2 ] n [1,2,3,4]. The polymeric nature of these complexes is closely associated with the equivalence of the two nitrogen atoms in the imidazole ring, which allows the diazolate to bridge between metal centers, forming tetrahedral ... M Im Im M ... chains.…”