Chromium (III) Acetate, Chromium (III) Acetate Hydroxide, or µ3-Oxo-esakis-(µ2-acetato-O,O') - triaqua-trichromium (III) Acetate? Determining the Structure of a Complex Compound by Analytical and Spectroscopic Methods
Chromium (III) Acetate, Chromium (III) Acetate Hydroxide, or µ3-Oxo-esakis-(µ2-acetato-O,O') - triaqua-trichromium (III) Acetate? Determining the Structure of a Complex Compound by Analytical and Spectroscopic Methods
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DOI：
10.1021/ed074p432
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发表时间：
1997-04
影响因子：
3
通讯作者：
L. Erre;G. Micera;T. Głowiak;H. Kozłowski
中科院分区：
文献类型：
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作者：
L. Erre;G. Micera;T. Głowiak;H. Kozłowski
本文报道了一个利用红外光谱和模型化合物来阐明醋酸铬（III）结构的实验。检查了具有以下常规配方的两种商业样品Cr 3（CH 3CO 2）7（OH）2和Cr（CH 3CO 2）3，并与模型化合物[Cr 3（µ2-CH 3COO）6（µ3-O）（H2O）3]DHB·2 H2O（DHB = 2，6-二羟基苯甲酸酯（1-））进行了比较。该实验可以用来说明分析和光谱数据的联合应用的优点，特别是使用对称性概念和IR-拉曼选择规则，在无机结构的归属.所有的样品都表现出独特的振动特征预测的三金属羧酸配合物与µ3-O-Cr 3笼.因此，可以得出结论，乙酸铬（III）具有三金属排列，其中六个乙酸根桥接由三价桥氧连接的三个金属离子，使得总共四个羧酸根氧围绕每个铬离子。水分子作为术语...
An experiment illustrating the use of infrared spectroscopy and model compounds to elucidate the structure of chromium (III) acetate is reported. Two commercial samples with the following conventional formulations Cr3(CH3CO2)7(OH)2 and Cr(CH3CO2)3 were examined and compared to the model compound [Cr3(µ2-CH3COO)6(µ3-O)(H2O)3]DHB·2H2O, DHB = 2,6-dihydroxybenzoate(1-). The experiment may serve to illustrate the advantage of the joint application of analytical and spectroscopic data, in particular the use of symmetry concepts and IR-Raman selection rules, in the assignment of inorganic structures.All the samples exhibit the distinctive vibrational features predicted for a trimetallic carboxylate complex with the µ3-O-Cr3 cage. Therefore, it may be concluded that chromium (III) acetates are endowed with a trimetallic arrangement where six acetates bridge three metal ions connected by a triply-bridging oxygen so that a total of four carboxylate oxygens surround each chromium ion. Water molecules act as the term...