SYNTHESIS AND CRYSTAL-STRUCTURE OF THE DIMERIC COMPOUND DI-MU-AZIDE-BIS(2,2'-6',2''-TERPYRIDINE) DICOPPER(II) HEXAFLUOROPHOSPHATE

The title compound of formula [Cu(terpy)(N3)]2(PF6)2 (with terpy = 2,2':6',2''-terpyridine) has been synthesized and its crystal structure solved at room temperature by X-ray diffraction methods. The structure consists of [Cu2(terpy)2(N3)2]2+ dimeric cations and non-coordinated hexafluorophosphate anions. The copper(II) ions are five-coordinate linked to three nitrogen atoms of the tridentate terpy ligand and two nitrogen atoms of the azide groups. The geometry of the coordination polyhedron is near to regular square pyramidal. Within the binuclear unit, the copper(II) ions are bridged by two azide groups in an end-on fashion. The Cu-Cu separation is 3.313(2) angstrom, and the Cu-N-Cu bridging angle is 96.3(3)-degrees.