Polynuclear cobalt(II/III) sulfites: synthesis, structure, and magnetic properties of the octanuclear cluster (NH4)11(Li subset[Co4IICo4III(SO3)16(NH3)8]).10H2O encapsulating a lithium cation.

Polynuclear cobalt(II/III) sulfites: synthesis, structure, and magnetic properties of the octanuclear cluster (NH4)11(Li subset[Co4IICo4III(SO3)16(NH3)8]).10H2O encapsulating a lithium cation.
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DOI:
10.1021/ic8004213
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发表时间:
2008-05
影响因子:
4.6
通讯作者:
G. I. Chilas;M. Stylianou;M. Kubicki;T. Vaimakis;P. Kögerler;A. Keramidas;T. Kabanos
G. I. Chilas;M. Stylianou;M. Kubicki;T. Vaimakis;P. Kögerler;A. Keramidas;T. Kabanos
中科院分区:
化学2区
文献类型:
--
作者:
G. I. Chilas;M. Stylianou;M. Kubicki;T. Vaimakis;P. Kögerler;A. Keramidas;T. Kabanos

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在(NH 4)2SO 3·H2O和LiCl存在下,在pH约5.3下,用(NH 4)6[Mo 7VIO 24]·4 H2O部分氧化CoIICl(2)·6 H2O的水溶液,导致分离八核簇(NH 4)11(Li子集[Co 4 IICo 4 III(SO 3)16(NH3)8]·10 H2O),1. 1的阴离子的结构由一个中心[Co 4 II],几乎理想的正方形平面单元,和一对与水相关的CoIII二聚体的上方和下方的Co 4 II平面接枝到四聚体上的16个桥接亚硫酸基团。[Co 8(SO 3)16(NH3)8]12-团簇包裹了位于Co 4 II正方形中心的锂阳离子。
Partial oxidation of an aqueous solution of CoIICl(2).6H2O with (NH4)6[Mo7VIO24].4H2O in the presence of (NH4)2SO3.H2O and LiCl, at pH approximately 5.3, leads to isolation of the octanuclear cluster (NH4)11(Li subset[Co4IICo4III(SO3)16(NH3)8].10H2O), 1. The structure of the anion of 1 consists of a central [Co4II], almost ideal square planar unit, and a pair of symmetry-related CoIII dimers above and below the Co4II plane grafting onto the tetramer by 16 bridging sulfite groups. The [Co8(SO3)16(NH3)8]12- cluster encapsulates a lithium cation which lies at the center of the Co4II square.