Reactivity of tricine in the presence of Cu(ClO₄)₂.6H₂O and 2,2'-bipyridine: Synthesis, characterization and magnetic property of the complexes

Abstract

1035-1042Three complexes, [Cu(bpy)(μ-OH)]2·2ClO4 (1) [Cu(H4TRI)(bpy)]ClO4 (2) and [Cu3(bpy)5(μ-O)(NO3)]2·6ClO4 (3) {H4TRI= tricine, bpy= 2,2'-bipyridine} have been synthesized and characterized using their IR, UV-vis and ESR spectroscopic data , elemental analysis and single crystal X-ray diffraction studies. The π-π interaction along the a-axis in complex (1) provides a channel- type structure while similar interaction in complex (2) generates a channel with floating ClO4- anions. Complex (3) comprises a pair of Cu(II) centers connected via (μ2-O) oxo bridges. These are further linked to Cu3 and Cu3#1 centers via oxygen atoms of the nitrate anion. The assembled structure of this complex along the c- axis displays a zig-zag chain formation. The variable temperature magnetic measurement of a representative complex (3), [Cu3(bpy)5(μ-O)(NO3)]2·6ClO4, shows that two of the Cu(II) centers couple ferromagnetically