The Chain Polymers (Imidazole)(N-salicylideneglycinato)copper(II) and (2-Ethylimidazole)(N-salicylideneglycinato)copper(II)

The title compounds, (imidazole-N³)(N-salicylideneglycinato-O,N,O')copper(II), [Cu(C₉H₇NO₃)(C₃H₄N₂)], (I), and (2-ethylimidazole-N³)(N-salicylideneglycinato-O,N,O')copper(II), [Cu(C₉H₇NO₃)(C₅H₈N₂)], (II), adopt square-pyramidal Cu^II coordination with the tridentate N-salicylideneglycinato Schiff base dianion and the imidazole ligand bound in the basal plane. In both structures the apex of the distorted pyramid is occupied by a carboxylic O atom from the neighbouring chelate at an apical distance of 2.563 (2) and 2.683 (2) Å, in (I) and (II), respectively, thus building infinite zigzag chains. According to the electron paramagnetic resonance patterns, in compound (I) the Cu^II complexes are arranged in two and in compound (II) in four magnetically inequivalent orientations.

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