{[Cu(phen)]3Cl4}2[GeMo12O40]: Synthesis, crystal structure and magnetic property of a new trinuclear copper complex based on germanomolybdate

A new trinuclear copper complex based on germanomolybdate, {[Cu(phen)]3(μ2-Cl)4}2[GeMo12O40] (1) (phen = 1,10-phenanthroline), has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectroscopy, TG analysis, X-ray powder diffraction (XRPD) and single-crystal X-ray diffraction. Single crystal X-ray analysis reveals that the structural unit of 1 consists of two coordination cations {[Cu(phen)]3(μ2-Cl)4}2+ (1a) and a saturated Keggin-type germanomolybdate polyoxoanion [GeMo12O40]4−. In 1, the most intriguing feature is that each trinuclear copper cation {[Cu(phen)]3(μ2-Cl)4}2+ is constructed from three [Cu(phen)]2+ cations bridged by four μ2-Cl atoms. Magnetic measurements indicate 1 shows the ferromagnetic exchange interactions within CuII centers.