Crystal Structure and Magnetic Properties of Cobalt Complex with Electron Transfer from Metal to Imino Nitroxide Radical Ligand
A new nitronyl nitroxide radical-transition metal complex[Co(imOH-2Py)(imO--2Py)(N3)2](CH3OH)(H2O) (imOH-2Py=2-(2'-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl) was synthesized.The structure and properties of the complex were characterized by elemental analysis,single crystal X-ray diffraction,and variable temperature magnetic susceptibility measurements.The results showed that the complex belongs to the triclinic system,space group P1,with the sure cell parameter.X-ray diffraction analysis showed that the complex consists of one[Co(imOH-2Py)(imO--2Py)(N3)2]u-nit one methanol molecule and one water molecule,in which the Co(Ⅲ) ion was six-coordinated in a dis-torted octahedral coordination geometry.Each Co(Ⅲ) ion was coordinated by two imOH-2Py radicals and two linear azide anions.Magnetic susceptibility studies revealed that the complex was diamagnetic.
nitroxide radical complexdiamagnetic metal Co(Ⅲ)crystal structuremagnetic properties