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本文研究了除Pm和Sc以外整个稀土系列草酸盐水合物在100—400cm~(-1)范围的Fourier变换远红外光谱。应用NORVIB程序,在简正坐标分析的基础上,对振动频率作了指认。对La至Eu的含水草酸盐络合物,红外分析所采用的结构模型依据Nd_2(C_2O_4)_(?)·10H_2O的晶体结构确定,即每个稀土离子周围有九个氧原子,六个氧原子来自三个草酸根离子,其余三个氧原子由水分子提供。对Gd至Lu以及Y的含水草酸盐络合物,则依据Yb_2(C_2O_4)_3·6H_2O的晶体结构确定,即每个稀土离子周围有八个氧原子,六个氧原子来自三个草酸根离子,其余二个氧原子由水分子提供。作图示出金属-配体的振动频率及力常数随镧系原子序数的变化关系,并对此作了讨论。#原图像不清楚
In this paper, Fourier transform far-infrared spectra of the whole rare earth oxalate hydrate except Pm and Sc in the range of 100-400cm ~ (-1) were studied. Applying NORVIB program, the vibration frequency is identified on the basis of simple coordinate analysis. For the La to Eu aqueous oxalate complex, the structural model adopted for IR analysis is based on the crystal structure of Nd_2 (C_2O_4) _10H_2O, that is, there are nine oxygen atoms around each rare earth ion and six Oxygen atoms are derived from three oxalate ions and the remaining three oxygen atoms are provided by water molecules. The aqueous oxalate complex of Gd to Lu and Y is based on the crystal structure of Yb_2 (C_2O_4) _3 · 6H_2O, that is, there are eight oxygen atoms around each rare earth ion and six oxygen atoms from three oxalates Ions and the remaining two oxygen atoms are provided by water molecules. The relationship between the vibrational frequency and the force constant of the metal-ligand with the atomic number of the lanthanide series is plotted and is discussed. # The original image is not clear