Departement für Chemie und Biochemie, Universtät Bern, Freiestrasse 3, CH-3012, Bern, Switzerland.
Dalton Trans. 2010 May 28;39(20):4937-50. doi: 10.1039/b927522c. Epub 2010 Apr 20.
We report here two series of coordination polymer chains: the first being M(II)(ox)(bnz)(2) (M = Mn 1, Fe 2, Co 3, Ni 4, Cu 5 and Zn 6; ox = oxalate C(2)O(4)(2-); bnz = benzimidazole) and the second M(II)(ox)(btz)(2) (M = Mn 7, Fe 8, Co 9, Ni 10, Cu 11 and Zn 12; btz = benzotriazole). The first series displays an unusual homometallic -M(i)-M(ii)-M(ii)- chain topology and the second series is isostructural to Fe(II)(ox)(btz)(2), originally reported by Jia et al. (Collect. Czech. Chem. Commun., 2002, 67, 1609-1615). These two series allow us to make comparisons between the spin state of each metal and the magnetic coupling interaction within an isostructural series spanning the full range of spin states available in 3d metals and to investigate which models are the best to use in each case. Compound 8 is a single-chain magnet, the behaviour through spin-canting arising from a Dzyaloshinskii-Moriya interaction. Additionally, we have synthesised a two-dimensional coordination polymer {[Zn(II)(bnz)(4)][Zn(II)(2)(ox)(3)]}(n) (13), in which distorted hexagonal Zn(II)(2)(ox)(3)(2n-) layers are hydrogen bonded by Zn(II)(bnz)(4) cations to give an interlayer separation of 12.001(2) Å.
第一个是M(II)(ox)(bnz)(2)（M = Mn 1, Fe 2, Co 3, Ni 4, Cu 5 和 Zn 6；ox = 草酸根 C(2)O(4)(2-)；bnz = 苯并咪唑），第二个是M(II)(ox)(btz)(2)（M = Mn 7, Fe 8, Co 9, Ni 10, Cu 11 和 Zn 12；btz = 苯并三唑）。第一个系列显示出不寻常的同金属-M(i)-M(ii)-M(ii)-链拓扑结构，第二个系列与 Jia 等人最初报道的Fe(II)(ox)(btz)(2)同构。Fe(II)(ox)(btz)(2)，（收集。捷克化学通讯，2002，67，1609-1615）。这两个系列使我们能够比较每个金属的自旋态和同构系列内的磁耦合相互作用，该系列跨越了 3d 金属中可用的所有自旋态，并研究在每种情况下使用哪种模型最好。化合物 8 是一种单链磁体，其行为通过自旋倾斜产生于 Dzyaloshinskii-Moriya 相互作用。此外，我们还合成了二维配位聚合物{[Zn(II)(bnz)(4)][Zn(II)(2)(ox)(3)]}(n)（13），其中扭曲的六边形Zn(II)(2)(ox)(3)(2n-)层通过Zn(II)(bnz)(4)阳离子氢键连接，层间距离为 12.001(2)Å。
