cis-Bis(tricyanomethanido-κN)[tris(2-aminoethyl)amineκ4N]nickel(II)

The crystal structure of the title complex, [Ni(C4N3)(2)(C6H18N4)], is made up of neutral mononuclear [Ni(tren){C(CN)(3)}(2)] units [tren = tris(2-aminoethyl)amine] which are linked through van der Waals interactions and N-H center dot center dot center dot N hydrogen bonds. The Ni atom has a distorted octahedral coordination environment, bonded to the four tren N atoms [average Ni-N = 2.096 (17) angstrom] and the two cis-positioned C(CN)(3) N atoms [Ni-N = 2.045 (4) and 2.118 (4) angstrom].