Structure and magnetic properties of a new binuclear copper(II) complex of a tripodal oxime

Perchlorate salt of a new binuclear [Cu2] cationic complex (1) with tris(1-propan-2-onyl oxime)amine acting as a ligand is introduced. In each complex cation two Cu2+ cations are linked by oxime groups from two ligands, whereas two remaining oxime groups per ligand remain non-deprotonated and participate in bifurcated O–H⋯O hydrogen bonds. Cu2+ ions are strongly antiferromagnetically coupled with singlet–triplet energy gap of about 2J = −750 cm−1, giving rise to interesting EPR properties.