Sodium-Centered Dodecanuclear Co(II) and Ni(II) Complexes with 2-(Phosphonomethylamino)succinic Acid: Studies of Spectroscopic, Structural, and Magnetic Properties
作者:Andriy O. Gudima、Ganna V. Shovkova、Olena K. Trunova、Fernande Grandjean、Gary J. Long、Nikolay Gerasimchuk
DOI:10.1021/ic400355u
日期:2013.7.1
an OH– anion, an anion which is disordered over the 18 sites. The PMAS4– ligand forms two five-membered and one six-membered chelation ring. Both 1 and 2 contain 24-membered metallacycles as a result of the bridging nature of the PMAS4– ligands. The resulting three-dimensional structures have one-dimensional channels with a sodium cation at the center of symmetry. The temperature dependence of the
两个新的具有2-(膦酰基甲基)氨基琥珀酸H 4 PMAS的同构钴(II)和镍(II)多核配合物,即Na [Co 12(PMAS)6(H 2 O)17(OH)]· x 2H 2 O,1 · x 2H 2 O和Na [Ni 12(PMAS)6(H 2 O)17(OH)]· x H 2 O,2 · x H 2O,是首次从水溶液中合成的,并通过单晶X射线衍射,红外和紫外可见漫反射光谱学进行了研究;TG / DTA分析;和磁化学。既1和2结晶在菱形晶体系统与ř与联合的1/6 3空间群12(PMAS)6或Ni 12(PMAS)6层在不对称单元中的部分。X射线精炼显示存在18个水位,但晶胞电荷平衡要求一个水分子必须是OH –阴离子,这是在18个位上无序的阴离子。PMAS 4 –配体形成两个五元和一个六元螯合环。既1和2含有24元metallacycles作为对PMAS的桥接性质的结果4-配体。所得的三维