Thioalcohols as bridging ligands in polynuclear PrIII/CuII and BaII/CuII complexes. Syntheses, structures and magnetic properties of Pr2Cu4(tde)3(Htde)2(hfacac) 4(μ6-O), Ba2Cu2(Htde)2(hfacac)4 and Cu4(tde) ...

Title full: Thioalcohols as bridging ligands in polynuclear Pr^III/Cu^II and Ba^II/Cu^II complexes. Syntheses, structures and magnetic properties of Pr2Cu4(tde)3(Htde)2(hfacac) ⁴(μ6-O), Ba2Cu2(Htde)2(hfacac)4 and Cu4(tde)2(hfacac)4, (H2tde = HOCH2CH2SCH2CH2OH). The syntheses of heterometallic compounds involving praseodymium, barium and copper ions by using 2,2′-thiodiethanol (H2tde) as the bridging ligand have been investigated. Three new polynuclear compounds, Pr2Cu4(tde)3(Htde)2(hfacac) 4(μ6-O) 1, Ba2Cu2(Htde)2(hfacac)4 2 and Cu4(tde)2(hfacac)4 3 have been obtained and characterized structurally. The metal atoms in 1 have an octahedral arrangement with the two Pr^III occupying two opposite vertices. In the center of the octahedron is a μ6-oxygen atom. The metal atoms in 2 have a rhombic arrangement with a long Cu ⋯ Cu separation distance (6.082 Å). The metal ions in 3 also have a rhombic arrangement with the copper atoms in close proximity to each other. The sulfur atoms of the Htde^- or tde^2- ligand are bound exclusively to copper centers in all three compounds. The Htde^- and tde^2- ligands display versatile bonding modes in the three compounds. Antiferromagnetic exchanges dominate in these compounds.