Structural, spectroscopic and magnetic properties of [Cu(1-meim)4]·2(PF6)

[Cu(1-meim)4]·2(PF6) (1-meim: 1-methylimidazole) complex has been synthesized and characterized by EPR, FT-IR, and XRD techniques. The Cu(II) complex crystallizes in the monoclinic system with the space group P2 1 / c . EPR spectrum of [Cu(1-meim)4]·2(PF6) powder has been studied at room temperature. The spin Hamiltonian parameters (g and hyperfine values) have been calculated. The results indicate the axial symmetry around the paramagnetic Cu2+ center. 2 2 The ground state wave function of Cu2+ ion has been constructed. The unpaired electron spends most of its time in d x 2 − y 2 orbital.