Synthesis, Structure, and Magnetic Ordering of Layered (2-D) V-Based Tris(oxalato)metalates
作者:Kil Sik Min、Arnold L. Rhinegold、Joel S. Miller
DOI:10.1021/ic051373+
日期:2005.11.1
indicating an S = 1 ground state. 2 exhibits intralayer ferromagnetic coupling below 20 K, but does not magnetically order above 2 K, and 3 shows a strong antiferromagnetic interaction between V(II), S = 3/2 and Cr(III), S = 3/2 ions (theta = -116 K) within the 2-D layers. 4 and 4a magnetically order as ferrimagnets at T(c)'s, taken as the onset of magnetization, of 11 and 30 K, respectively. The 2 K
K 3 [M(III)(ox)3] .3H 2 O的反应[M = V(1),Cr; [M + H] +。ox =草酸盐],Mn(II)/ V(II)和[N(n-Bu)4] Br在水中导致分离出基于2-D V的配位聚合物[[N(n-Bu) 4] [Mn(II)V(III)(ox)3]] n(2),[[N(n-Bu)4] [V(II)Cr(III)(ox)3]] n(3 ),[[N(n-Bu)4] [V(II)V(III)(ox)3]] n(4)和形成4的中间体,[[N(n-Bu)4 ] [V(II)V(III)(ox)3(H2O)2]] n.2.5H2O(4a),而一维[V(II)(ox)(H2O)2] n(5)为通过在水中使用Na2ox和[V(OH2)6] SO4获得。1-5的结构已经通过单晶和/或粉末X射线晶体学研究。在1中,V(III)与三个草酸盐双阴离子配位,近似为D3对称的,扭曲的八面体八面体。1是顺磁性的[在300