Synthesis, structure and magnetic properties of the mixed metal oxide solids [{M(H2O)2}V2O6] (M=Co, Ni)
作者： M. Ishaque Khan , Sangita Deb , Vladimir O. Golub , Charles J. O'Connor , Robert J. Doedens
DOI: 10.1016/J.MOLSTRUC.2004.07.030
关键词: Single crystal 、 Inorganic chemistry 、 Crystallography 、 Nickel 、 Oxide 、 Orthorhombic crystal system 、 Octahedron 、 Crystal structure 、 Vanadium oxide 、 Chemistry 、 Magnetic susceptibility
摘要: Abstract Two mixed-metal oxide solids [{Co(H 2 O) }V O 6 ] ( 1 ) and [{Ni(H have been prepared characterized by infrared spectroscopy, thermogravimetric analysis, manganometric titration, variable temperature magnetic susceptibility measurements, complete single crystal X-ray structure analyses. The isomorphous structures of consist three-dimensional frameworks composed vanadium chains cross-linked {M(H 4 } (M=Co, ; M=Ni, units. are corner sharing {VO tetrahedra. compounds good thermal stability lose coordinated water molecules above 190 232 °C, respectively. effective moments for at 300 K close to the values expected non-interacting high-spin cobalt(II) nickel(II) centers in octahedral ligand fields. Crystal data: , H CoO 8 V orthorhombic space group Pnma a =5.568(2), b =10.690(6), c =11.832(5) A, =704.3(7) A 3 Z =4, ρ calc =2.762 Mg m −3 R =0.0329; NiO =5.536(1), =10.633(2), =11.762(2) A, =692.3(3) A =2.808 Mg m =0.0160.
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