A Trinuclear Cu(II) Complex from the Use of Phenyl 2-Pyridyl Ketoxime: Structure and Magnetic Behavior

Abstract

The reaction of phenyl 2-pyridyl ketoxime (PhPyCNOH) with Cu(BF 4 ) 2 · 6H 2 O in methanol results in the trinuclear complex [Cu 3 (OH)(PhpyCNO) 3 (H 2 O)](BF 4 ) 2 (1), which has been characterized by elemental analyses, IR spectrum and single-crystal X-ray diffraction techniques. The structure of 1 exhibits a triangle of Cu(II) ions, centered by a triply bridging hydroxo ligand and with three edge-bridging oximate groups from the three PhPyCNO− ions. The Cu 3 OH units have an average Cu-O distance of 1.962(4) Å, an average Cu-Cu distance of 3.177(4) Å, and an average Cu-O-Cu angle of 108.2(2)°. Variable-temperature magnetic susceptibility studies reveal an antiferromagnetically-coupled system showing antisymmetric exchange.