New cobalt- and sodium-containing heteronuclear phosphonate clusters: Synthesis, structure and properties

New polynuclear heteroligand complexes [(η-HPiv)2(μ2-Hmhp)4Na6Co5(μ6,η2-O3PPh)2(μ3,η2-Piv)2(μ3-Piv)3(μ-Piv)7]·2C10H22 (1·2C10H22) and [(η-H2O)4Na12Co12(μ5,η2-O3PPh)4(μ6-O3PPh)4(μ3,η2-mhp)8(μ2-Piv)4(μ3-Piv)8]·1.25C10H22 (2·1.25C10H22), where Hmhp is 6-methyl-2-pyridone, mhp is the 6-methyl-2-piridonate, and Piv is the pivalate anion, were obtained by the self-assembly of {Co(Piv)2}n, Na2O3PPh, and Hmhp in boiling decane (174 °C). The structures of compounds 1·2C10H22 and 2·1.25C10H22 were determined by single-crystal X-ray diffraction. The magnetic properties of these compounds and their thermal decomposition were investigated. The removal of coordinated water molecules from complex 2·1.25C10H22 begins at 470 °С.

New cobalt- and sodium-containing heteronuclear phosphonate clusters [(η-HPiv)2(μ2-Hmhp)4Na6Co5(μ6,η2-O3PPh)2(μ3,η2-Piv)2(μ3-Piv)3(μ-Piv)7]·2C10H22 and [(η-H2O)4Na12Co12(μ5,η2-O3PPh)4(μ6-O3PPh)4(μ3,η2-mhp)8(μ2-Piv)4(μ3-Piv)8]·1.25C10H22 were synthesized. The thermal decomposition and magnetic properties of these polynuclear complexes were studied.Figure optionsDownload as PowerPoint slideHighlights
► Cobalt(II) pivalate polymer {Co(Piv)2}n.
► Cobalt- and sodium-containing heteronuclear phosphonate clusters.
► The structures were determined by using single-crystal X-ray diffraction.
► The thermal decomposition and magnetic properties of synthesized complexes were investigated.
► The removal of coordinated water molecules from complex 2·1.25C10H22 begins at 470 °С.