The reactions of four new unsymmetrical N,O-donor ligands, {H2BBPETEN= [N-(2-hydroxybenzyl) - N,N' - bis(2 methylpyridyl) -N'-(hydroxyethyl) ethylenodiamine], H3BPETEN=[N,N'- bis(2-hydroxybenzyl) -N- (2-methylpyridyl) -N'- (hydroxyethyl) ethylenodiamine], HTPETEN=[N,N,N'- tris(2-methylpyridyl) -N'- (hydroxyethyl) ethylenodiamine] and H3BIMETEN=[N,N'-(2-hydroxybenzyl)-N-(1-methylimidazol-2-il-methyl)-N'- (hydroxyethyl)ethylenodiamine]}, with Cu(II) salts afforded the following mononuclear compounds: [CuII(HBBPETEN)]ClO4, [CuII(H2BPETEN)]ClO4 , [CuII(HTPETEN)](PF6)2 and [CuII(H2BIMETEN)]ClO4 . All were characterized by EPR, electronic spectroscopy and electrochemistry. The four copper (II) compounds showed interesting electrochemistry properties. All presented an anodic wave that can be attributed to the Cu (I) oxide formation at the electrode surface, or to a Cu0 sediment at the same surface or yet, to Cu(I) -> Cu(II) oxidation process with coupled chemistry reaction, due to their irreversibility. Two of the complexes are described as interesting synthetic models for the active site of the metalloenzyme galactose oxidase.

Reportamos neste trabalho, a síntese, a estrutura cristalina e propriedades espectroscópicas do novo complexo [OV IV(HBIMETEN)], [H3BIMETEN = N,N'-(2-hidroxibenzil)-N-(1-metilimidazol-2-il-metil)-N'-hidroxietil-etilenodiamina] como um exemplo de complexo V IV O2+ o qual contém grupos 1-metilimidazol e fenolato coordenados simultaneamente ao centro metálico. Este composto apresenta propriedades espectrais (EPR e UV-Vis) similares àquelas observadas na [OV IV(tf)].

The synthesis, X-ray crystal structure, and spectroscopic properties of the new coordination compound [OV IV(HBIMETEN)], [H3BIMETEN = N , N' - (2-hydroxybenzil) -N-(1-methylimidazole-2-yl-methyl)-N'-hydroxyethil-ethylenediamine] are reported as V IV O2+ complex example containing phenolate and 1-methylimidazole coordinated simultaneously to the metal center. The EPR and UV-Vis properties of the title compound are similar to those observed in [OV IV(tf)].