X-ray diffraction study of aqueous zinc(II)(2,2′,2″-triaminotriethylamine) chloride

Abstract

The structure of the major zinc-containing species in an aqueous solution of 2.20 mol dm^–3 ZnCl₂+ 2,2′,2″-triaminotriethylamine (tren)(1 : 1) has been investigated by X-ray diffraction. The data have been analysed in terms of six models containing four-, five- or six-coordinate zinc. The preferred model involves the cation [Zn(tren)Cl]⁺, in which the disposition around the Zn is approximately trigonal-bipyramidal and similar to that reported in two single-crystal determinations on zinc(tren) complexes. The average Zn–N distance is 2.09(2)Å and the Zn—Cl distance 2.37(3)Å.