摘要
对下列含MoFe3S4 单元的μ2-OR或μ2 -SR桥联双类立方烷簇合物的红外光谱进行了研究:(Et4 N)3[Mo2Fe6 S8Cl6 (OMe)3 ](1),(Et4 N)3 [Mo2 Fe6 S8 (SPh)6 (OMe)3 ](2),(Bu4N)3 [Mo2Fe6S8 (SPh)6 (OMe)3 ](3),(Et4N)3 [Mo2Fe6S8 (SBut)6(OMe)3](4),(Et4N)3 [Mo2Fe6S8 (SPh)9 ](5)。通过这系列簇合物特征振动频率和结构参数及与线型Mo-Fe-S簇合物红外光谱的比较,对其νM o-μ2O(R) ,νM o-μ2S(R),νM o-S,νFe-S,νFe-SR,νFe-Cl 进行了归属。对其中两条途径的亲电诱导效应及Δν(即νM o-S-νFe-S)与Fe→Mo 电荷迁移的关系进行了探讨。最后,讨论了桥联双类立方烷与线型Mo-Fe-S簇合物红外光谱的共性和差异。
The IR spectra of μ 2 OR or μ 2 SR bridged double cubane like clusters containing MoFe 3S 4 cores(Et 4N) 3[Mo 2Fe 6S 8Cl 6(OMe) 3](1),(Et 4N) 3[Mo 2Fe 6S 8(SPh) 6(OMe) 3](2),(Bu 4N) 3[Mo 2Fe 6S 8(SPh) 6(OMe) 3](3),(Et 4N) 3[Mo 2Fe 6S 8(SBu t) 6(OMe) 3](4),(Et 4N) 3[Mo 2Fe 6S 8(SPh) 9](5) have been investigated.Their characteristic frequencies ν Mo μ 2 O(R) ,ν Mo μ 2 S(R) ,ν Mo S ,ν Fe S ,ν Fe SR ,ν Fe Cl were assigned by comparing their vibrational frequencies with their structural parameters and by comparing the IR spectra of them with that of the linear clusters.The electrophilic induced effects in different way and the relationship between Δν(i.e.ν Mo S ν Fe S )and Fe→Mo charge transfer have been discussed.Finaly,the sameness and difference between the double cubane like and linear Mo Fe S clusters were demonstrated.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1999年第5期666-669,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金
福建省自然科学基金
关键词
红外光谱
桥联
立方烷
双类立方烷
簇合物
Infrared spectra
MoFe 3S 4 core
Doulbe cubane like cluster
Fe→Mo charge transition