Dinuclear copper(II) chloro complex of the ligand 2,3,5,6-tetra(2-pyridyl)pyrazine

Crystallographic and magnetic studies have been performed on the complex, [{CuCl}2(μ-tppz)][PF6]2, where tppz is 2,3,5,6-tetra-2-pyridinylpyrazine. The crystal structure revealed an infinite, ionic chain. The temperature-dependent magnetic susceptibilitity could be satisfactorily fitted by using a modified Bleaney-Bowers expression (for H = −JSa · SbJ = −5.6 cm−1 and g = 2.16) where the exchange interaction is suggested to involve the orbitals of the tppz ligand.