Solvent Influence on UV, 59Co, and 13C NMR of [Co(CN)6]3− and Its Solvation Site
Solvent Influence on UV, 59Co, and 13C NMR of [Co(CN)6]3− and Its Solvation Site
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溶剂对 [Co(CN)6]3− 及其溶剂化位点的 UV、59Co 和 13C NMR 的影响
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
T. Taura
中科院分区：
文献类型：
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作者：
T. Taura
在水和各种有机溶剂中测量了六氰钴酸钾K3[Co（CN）6]的电子吸收（UV）光谱、59 Co和13 C NMR：乙二醇、甲醇、甲酰胺、乙醇、氯仿、硝基甲烷、二氯甲烷、二甲基亚砜、乙腈、N，N-二甲基甲酰胺、苯甲腈和硝基苯。用大双环聚醚穴醚222将络合盐溶解在有机溶剂中。结果发现，光谱的影响，溶剂，并根据亲电能力（古特曼受体数）的溶剂。特别是，13 C NMR化学位移的协调氰基碳（八隅体）已移至低场作为受体数变得更大。这意味着溶剂的影响是由配体CN-和作为电子受体的溶剂分子之间的直接相互作用引起的。研究了溶剂对第一d-d跃迁带峰位的影响与溶剂对化学发光峰位的影响之间的线性关系。
The electronic absorption (UV) spectrum, 59Co, and 13C NMR of potassium hexacyanocobaltate(III), K3[Co(CN)6], were measured in water and a variety of organic solvents: ethylene glycol, methanol, formamide, ethanol, chloroform, nitromethane, dichloromethane, dimethyl sulfoxide, acetonitrile, N,N-dimethylformamide, benzonitrile, and nitrobenzene. The complex salt was dissolved in organic solvents by macrobicyclic polyether, cryptand 222. It was found that the spectra are influenced by the solvent, and vary according to the electrophilic ability (Gutmann’s acceptor number) of solvents. Especially, the 13C NMR chemical shifts of coordinated cyano carbons (octet) have shifted downfield as the acceptor number becomes larger. This means that the solvent influence is caused by direct interaction between the ligand CN− and solvent molecules as electron acceptors. The result concerning the linear correlation between the solvent influence on the peak position (nm) of the first d–d transition band and on the chemical...