Crystal Structureof(2,2′-Bipyridine-N, N′)(2,2′,2″-Triaminotriethylamine-N, N′, N″, N″′)nickel(II) Diperchlorate

An X-ray structure determination shows that the Ni(II) ion is a distorted six-coordinated octahedron by four nitrogen atoms of the tetradentate tren ligand constituting the equatorial square base, and by two nitrogen atoms of the bidentate bpy ligand in a cis position. The two six-membered rings of bpy are coplanar and almost pararell. The tetradentate ligand consists of three five-membered chelate rings in gauche coformations. The Ni–N(tren) bond lengths of this complex are almost equivalent to the reported values.