Hydrothermal synthesis, structures and magnetic properties of two new holmium(III) oxalato complexes

作者：Zhang Yingjie; Karatchevtseva Inna; Kong Linggen; Price Jason R; Scales Nicholas; Deen Stephen; Zheng Rongkun

来源：Journal of Coordination Chemistry, 2017, 70(12): 2040-2051.

DOI：10.1080/00958972.2017.1320709

• Holmium
• oxalato
• magnetic susceptibility
• X-ray crystallography

Two new holmium (Ho) oxalato complexes have been synthesized under hydrothermal conditions and structurally characterized. [Ho(OH)(2)](2)(C2O4) (1) has a 3-D structure with Ho-((3)-OH) hydroxide layers connected by (4)-bridging oxalate ligands forming a unique hybrid structure. Sr(H2O)(4)[Ho(C2O4)(2)(H2O)](2)2H(2)O (2) has a 3-D structure built through (2)-bridging oxalate ligands connecting hexagonal Ho oxalate layers with hydrated Sr2+ ions in the channels. Different oxalate ligand arrangements around the metal ions control the structural alterations among the lanthanoid double oxalates even with similar formulas. Both structures have been discussed and compared to the existing lanthanoid oxalato complexes. In addition, their vibration modes, thermal stabilities, electronic structures, and magnetic properties have been further investigated and reported. Both 1 and 2 show the deviation of the magnetic behaviors from the Curie-Weiss law due to the crystal field effects.
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• 出版日期2017