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metal-organic compounds
Colourless rhombohedral crystals of dodekakis[tris(2-aminoethyl)amine]heptacadmium(II) tetradecaperchlorate, [Cd7(tren)12](ClO4)14, form from aqueous solutions of the cellulose solvent `Cd–tren' on addition of perchloric acid. The heptanuclear cations are flat star-shaped disks and are composed of Cd(tren) moieties that are linked by further tren ligands, which exhibit the unusual μ3,κ3N,N′,N′′ mode of coordination.