Infrared Spectra of Gaseous Transition‐Metal Dihalides
Infrared Spectra of Gaseous Transition‐Metal Dihalides
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气态过渡金属二卤化物的红外光谱
DOI：
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发表时间：
1962
期刊：
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通讯作者：
W. Klemperer
中科院分区：
文献类型：
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作者：
G. E. Leroi;T. C. James;J. T. Hougen;W. Klemperer
在220和4000 cm-1之间的吸收中测量了气态MnCl_2、FeCl_2、CoCl_2、NiCl_2、CuCl_2和CoBr_2的红外光谱。除MnCl_2和CuCl_2外，这些分子的发射光谱也在该区域获得。从不饱和蒸汽的排放表明，观察到的两个二卤化物，而不是氯化锰，是由于一个聚合物物种的振动之一。假设单体二卤化物分子具有D∞h对称性，则单体吸收归属于反对称伸缩振动ν3。用线性模型和简单价力场计算的M-X键伸缩力常数与相应的双原子单卤化物的M-X键伸缩力常数十分相似。这两组常数都在锰和锌之间显示出最大值。
The infrared spectra of gaseous MnCl2, FeCl2, CoCl2, NiCl2, CuCl2, and CoBr2 have been measured in absorption between 220 and 4000 cm—1. With the exceptions of MnCl2 and CuCl2, the emission spectra of these molecules have also been obtained in this region. The emission from unsaturated vapor indicates that one of the two absorptions observed for each of the dihalides, other than manganous chloride, is attributable to a vibration of a polymeric species. Assuming that the monomeric dihalide molecules have D∞h symmetry, the monomeric absorption is assigned to ν3, the antisymmetric stretching vibration. The M—X bond stretching force constants calculated using the linear model and a simple valence force field are quite similar to those of the corresponding diatomic monohalides. Both sets of constants show a maximum between manganese and zinc.