Synthesis,crystal structure and magnetic properties of a new complex containing Cu(I) and radicals, [Cu(imme2py)2](ClO4)

A new complex, [Cu(imme2py)₂](ClO₄) (imme2py?=?2-(2′-(6′-methylpyridyl))-4,4,5,5-tetramethyl-1H-imidazolyl-1-oxyl) has been synthesized and structurally characterized by X-ray diffraction methods. It crystallizes in the orthorhombic crystal system, space group P ₂₁₂₁₂₁ . The structure consists of [Cu(imme2py)₂]⁺ cations and chloride anions. The coordination geometry about Cu(I) is tetrahedral with the four coordination sites being occupied by four nitrogen atoms. Magnetic measurements show intramolecular antiferromagnetic interactions between the imino nitroxides.