(C4H12N2)[CoCl4]: tetrahedrally coordinated Co2+ without the orbital degeneracy.

(C4H12N2)[CoCl4]: tetrahedrally coordinated Co2+ without the orbital degeneracy.
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(C4H12N2)[CoCl4]:无轨道简并的四面体配位 Co2。

DOI:
10.1107/s2052520614024809
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发表时间:
2015
期刊:
Acta crystallographica Section B, Structural science, crystal engineering and materials
影响因子:
--
通讯作者:
Decaroli C
Decaroli C
中科院分区:
--
文献类型:
--
作者:
Decaroli C

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本文报道了一种新的四面体结构的Co ~(2+)S = {3\over 2}化合物(C_4H_(12)N_2)[CoCl_4]的合成、晶体结构和磁性。Co2+的S = {3\over 2}磁性基态,用磁化强度测量,意味着不存在自旋-轨道耦合和轨道简并。这与基于八面体甚至已知的四面体Co2+的化合物形成对比[Cotton等人(1961)。J. Am. Chem.Soc.83,4690]系统,其中测量了相当大的自旋-轨道耦合。用单晶X射线衍射、磁化率、红外光谱和紫外-可见光谱对化合物进行了表征。磁化率测量发现没有磁有序高于2K。 结果也与以前已知的单斜水合类似物进行了比较。
We report on the synthesis, crystal structure and magnetic properties of a previously unreported Co2+ S = {3\over 2} compound, (C4H12N2)[CoCl4], based upon a tetrahedral crystalline environment. The S = {3\over 2} magnetic ground state of Co2+, measured with magnetization, implies an absence of spin-orbit coupling and orbital degeneracy. This contrasts with compounds based upon an octahedral and even known tetrahedral Co2+ [Cotton et al. (1961). J. Am. Chem. Soc. 83, 4690] systems where a sizable spin-orbit coupling is measured. The compound is characterized with single-crystal X-ray diffraction, magnetic susceptibility, IR and UV–vis spectroscopy. Magnetic susceptibility measurements find no magnetic ordering above 2 K. The results are also compared with the previously known monoclinic hydrated analogue.
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发表时间: 2007-07-13
影响因子: 8.6
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