Structural and magnetic studies on a new mixed-valence Cu(I)–Cu(II) octanuclear cluster with a dithiocarbamate derivative

A new mixed-valence Cu(I)–Cu(II) octanuclear cluster, [CuICuII(n-Pr2dtc)Cl2]2[Cu2II(n-Pr2dtc)2Cl2]2 (1) (n-Pr2dtc− = di-n-propyl-dithiocarbamate) with a dithiocarbamate derivative has been synthesized and structurally characterized. Complex 1 consists of a mixed-valence Cu(I)–Cu(II) tetranuclear unit and two chloride-bridged Cu(II) dinuclear units. The octanuclear cluster forms an infinite one-dimensional assembly by weak Cu⋯Cl and Cu⋯S coordination bonds between the chloride bridged dinuclear units. The magnetic study indicates the existence of a strong antiferromagnetic interaction (J = −35.6 cm−1) between the copper ions of the chloride-bridged Cu(II) dinuclear unit, Cu2II(n-Pr2dtc)2Cl2.

Graphical abstractA new mixed-valence Cu(I)–Cu(II) octanuclear cluster, [CuICuII(n-Pr2dtc)Cl2]2[Cu2II(n-Pr2dtc)2Cl2]2 (1), was synthesized with a dithiocarbamate derivative (n-Pr2dtc− = di-n-propyl-dithiocarbamate), and was structurally and magnetically characterized. Complex 1 has infinite one-dimensional assembly structure consists of a mixed-valence Cu(I)–Cu(II) tetranuclear unit and two chloride-bridged Cu(II) dinuclear units. The magnetic study indicates the existence of a strong antiferromagnetic interaction (J = −35.6 cm−1).Figure optionsDownload full-size imageDownload as PowerPoint slide