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本文报道了标题簇合物的快原子轰击质谱(FAB—MS)研究,提出了标题簇合物质谱的可能断裂途径及其结构相关性。指出标题簇合物的FAB—MS与电子轰击谱(EI—MS)所表现的两种迥然不同的断裂模式。观察到单立方烷缺一个顶点和缺二个顶点的碎片离子如[WFe_2S_3(S_2CNC_4H_8)_2]~+、(MoFe_2S_3(S_2CNC_4H_8)_3]~+和[WFeS_3(S_2CNC_4H_8)_3]~+、[MoFe_3S_3(S_2CNC_4H_8)_2]~+等,而后者的簇芯(MoFe_3S_3)结构具有缺口的立方烷状构型特点,是目前合成工作者期待合成但尚未合成出的一种固氮模型物。
In this paper, we report the fast atom bombardment mass spectrometry (FAB-MS) study of the title clusters, and propose the possible rupture pathways and their structural correlations of the title cluster compounds. The two completely different modes of fragmentation exhibited by FAB-MS and EI-MS of the title clusters were pointed out. It is observed that the fragmentation ions with one vertex and one lacking two vertices in monometallurgy such as [WFe_2S_3 (S_2CNC_4H_8) _2] ~ +, [MoFe_2S_3 (S_2CNC_4H_8) _3] ~ + [WFeS_3 (S_2CNC_4H_8) _3] ~ + [MoFe_3S_3 S_2CNC_4H_8) _2] ~ + and so on, while the latter cluster structure (MoFe_3S_3) has a notched cubic alkane structure, which is a kind of nitrogen fixation model material that synthesis workers expect to synthesize but not yet synthesized.