An electron spin resonance study of (N-2-Pyridylsalicylaldiminato)copper(II) nitrate

Abstract

The magnetic susceptibility of (N-2-pyridylsalicylaldiminato)copper(II) nitrate and chloride has been measured at room temperature and 97 K. Contrary to results reported previously we find no evidence for the presence of magnetic exchange interactions in these compounds. Electron spin resonance spectral data on the ethanol-dimethylformamide solutions of the chelates show that the chelates are monomeric in the liquid phase but largely in dimeric form in frozen solution. Computer simulation of the experimental e.s.r. spectra due to the dimeric form has enabled a determination of the symmetry arrangement and structural properties of the pair system to be made.