Acta Crystallographica Section C
Crystal Structure Communications
Volume 58, Part 2 (February 2002)
Acta Cryst. (2002). C58, m70-m73 [doi:10.1107/S0108270101015992]
Two new [Ni(tren)2]2+ complexes: [Ni(tren)2]Cl2 and [Ni(tren)2]WS4
J. Ellermeier, R. Stähler and W. Bensch
Abstract: Both title compounds, bis[tris(2-aminoethyl)amine]nickel(II) dichloride, [Ni(tren)2]Cl2, (I), and bis[tris(2-aminoethyl)amine]nickel(II) tetrathiotungstate, [Ni(tren)2]WS4, (II), contain the [Ni(tren)2]2+ cation [tren is tris(2-aminoethyl)amine, C6H18N4]. The tren molecule acts as a tridentate ligand around the central Ni atom, with the remaining primary amine group not bound to the central atom. In (I), Ni2+ is located on a centre of inversion surrounded by one crystallographically independent tren molecule. In the [Ni(tren)2]2+ cation of (II), the Ni atom is bound to two crystallographically independent tren molecules. The Ni atoms in the [Ni(tren)2]2+ complexes are in a distorted octahedral environment consisting of six N atoms from the chelating tren molecules. The counter-ions are chloride anions in (I) and the tetrahedral [WS4]2- anion in (II). Hydrogen bonding is observed in both compounds.
Formula: [Ni(C6H18N4)2]Cl2 and [Ni(C6H18N4)2]WS4
Online 16 January 2002
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