The new decanuclear copper(II) cluster [Cu5(β-alaha)4Cl2]2 · 2HCl · 15H2O, its structure, spectroscopy and magnetism

The new polynuclear copper(II) cluster with β-alaninehydroxamic acid of formula [Cu5(β-alaha)4Cl2]2 · 2HCl · 15H2O, where β-alaha stands for β-alaninehydroxamate (C3H6N2O22-), was obtained. Single crystals of the complex were growing up in water solution. The cluster is composed of two pentameric subunits joined together by chloride bridges. Magnetic studies showed rather strong spin correlation within pentanuclear clusters and weaker interaction between them. Spectroscopic behavior of the single crystals of the cluster were studied at 293 and 4 K. Strong interactions of copper ions with different symmetry sites and strong electron–phonon coupling lead to broad unsplit spectra even at 4 K.

Graphical abstractStructure, spectroscopy and magnetism of new decanuclear copper(II) cluster with β-alaninehydroxamic acid of formula [Cu5(β-alaha)4Cl2]2 · 2HCl · 15H2O, where β-alaha stands for β-alaninehydroxamate (C3H6N2O22-), are reported. The complex is composed of two pentanuclear subunits bridged by four chloride anions. Magnetic studies showed predominant antiferromagnetic interactions within Cu5 core and weaker interactions between Cu(II) ions from two pentameric units connected through chloride bridges.Figure optionsDownload full-size imageDownload as PowerPoint slide