Metal-Organic Complexes of CU (II): Ground State and Exchange Interactions in Magnetic Subsystem

The EPR spectra of powder samples for series of metal-organic compounds of Cu2+ion have been investigated. These compounds are characterized by presence of identical chains of octahedrons of local surrounding for Cu2+ but ligand structures between chains are very different. Resonance absorption bands allow the determination of components of effective g-factor and linewidth of individual powder particles and their temperature dependence. It is established that the orbital singlet |x2−y2τ is the ground state of copper ion for all compounds. The parameters of exchange interaction had been also determined for these compounds. System with the simplest geometry of structure between chains in investigated series show the highest energy of exchange interactions.