Synthesis and crystal structure of the first d–f heterodinuclear Dy(iii)–Cu(ii) cryptate

The heterodinuclear cryptate [DyCuL(DMF)](ClO4)2· MeCN [where L denotes the deprotonated anionic cryptand obtained by condensation of tris(2-aminoethyl)amine with 2,6-diformyl-4-chlorophenol] has been obtained by a stepwise method; the presence of copper(II) and dysprosium(III) in the cavity of the cryptand was evidenced by X-ray structure analysis and ESMS spectroscopy.