Resonance-Raman and infrared studies of cyanide-bridged dimetal complexes
Resonance-Raman and infrared studies of cyanide-bridged dimetal complexes
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氰化物桥联二金属配合物的共振拉曼和红外研究
DOI：
10.1039/dt9810000939
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
E. Nour
中科院分区：
文献类型：
--
作者：
R. Hester;E. Nour
拉曼和红外光谱测定了CN桥双金属配合物阴离子[（NC）_5FeII（CN）CoIII（CN）_5]_6 ~-和[（NC）_5FeIII（CN）CoIII（CN）_5]_5 ~-的ν（CN）区光谱。光谱显示在2 130和2 185 cm-1，分别，这是分配给桥接CN基团的伸缩模式的频带。两个短寿命反应中间体[（NC）5 FeII（CN）CoIII（edta）]5-和[（NC）5 FeIII（CN）CoIII（edta）]4-（edta =NNN′N′-乙二胺四乙酸盐）的光谱在2134和2182 cm-1处有相似的峰.终端CN伸缩模式都发生在低得多的波数。[（NC）5 FeII（CN）CoIII（CN）5]6-和[（NC）5 FeII（CN）CoIII（edta）]5-中桥连基团的ν（CN）拉曼谱带分别在395和565 nm处显示出与吸收带相关的共振增强，表明这些谱带可以归属于通过CN桥的FeII→CoIII型电荷转移跃迁。
Raman and i.r. spectra have been determined in the ν(CN) region of the CN-bridged dimetal complex anions [(NC)5FeII(CN)CoIII(CN)5]6– and [(NC)5FeIII(CN)CoIII(CN)5]5–. The spectra show bands at 2 130 and 2 185 cm–1, respectively, which are assigned to the stretching modes of the bridging CN groups. Similar modes are assigned at 2 134 and 2 182 cm–1 in the spectra of the two short-lived reaction intermediates [(NC)5FeII(CN)CoIII(edta)]5– and [(NC)5FeIII(CN)CoIII(edta)]4–, respectively (edta =NNN′N′-ethylenediaminetetra-acetate). The terminal CN stretching modes all occur at much lower wavenumbers. ν(CN) Raman bands of the bridging group in both [(NC)5FeII(CN)CoIII(CN)5]6– and [(NC)5FeII(CN)CoIII(edta)]5– show resonance enhancement associated with the absorption bands at 395 and 565 nm, respectively, indicating that these bands may be assigned to a charge-transfer transition of the type FeII→CoIII through the CN bridge.