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本文对若干线型Mo—Fe—S簇合物[Cl_2FeS_2MoS_2FeCl_2]~(2-)(1)、[S_2MoS_2FeCl_2]~(2-)(2)、[S_2MoS_2Fe(SPh)_2]~(2-)(3)、[S_2MoS_2FeS_2Fe(SPh)_2]~(3-)(4)、[S_2MoS_2FeS_2MoS_2]~(3-)(5)、[Cl_2FeS_2FeCl_2]~(2-)(6)、[(PhS)_2FeS_2Fe(SPh)_2]~(2-)(7)的红外光谱进行了研究.通过比较它们的特征频率、结构参数和金属原子的氧化态,对ν_(Mo-St)、ν_(Mo-Sb)、ν_(Fe-Sb)、ν_(Fe-SPh)、ν_(Fe-Cl)进行了归属.并对δ_(S-Mo-s)的归属作了初步探讨.文中讨论了MoS_2Fe单元中Mo原子对ν_(Fe-Sb)的影响.通过振动频率与结构关系的研究揭示其内在联系及规律性.对两条途径的亲电诱导效应进行了讨论.并提出一个能定性标志Fe→Mo电荷迁移大小的有用参数△ν值.
In this paper, some linear Mo-Fe-S clusters [Cl_2FeS_2MoS_2FeCl_2] ~ (2 -) (1), [S_2MoS_2FeCl_2] ~ (2 -), [S_2MoS_2Fe (SPh) (2) (6), [(PhS) 2FeS_2Fe (SPh) 2], [S_2MoS_2FeS_2Fe (SPh) 2] ~ (3-4), [S_2MoS_2FeS_2MoS_2] (Mo-St), ν_ (Mo-Sb), ν_ (Mo-Sb), and ν_ (Mo_3) were studied by comparing their characteristic frequencies, (Fe-Sb), ν_ (Fe-SPh) and ν_ (Fe-Cl) were also studied. The assignment of δ_ (S-Mo-s) (Fe-Sb) .The relationship between the vibrational frequency and the structure is revealed and its intrinsic relationship and regularity are discussed.The electrophilic induction effect of the two pathways is discussed.And a qualitative and quantitative identification of Fe → Mo charge transfer Useful parameter △ ν value.