Synthesis and characterization of first hetero-nuclear molybdenum copper cluster with highly delocalized Cu(I)/Cu(II)

A novel molybdenum–copper cluster with highly delocalized mixed-valence Cu(I)/Cu(II) [MoO3Cu2(obipy)2]2O (1), has been hydrothermally synthesized and characterized by the elemental analyses, IR, XPS, TG analysis and the single crystal X-ray diffraction. The feature of 1 is that two copper atoms have different coordination configuration and valences. Variable temperature magnetic susceptibility measurements show the occurrence of a weak ferromagnetic interaction in 1.