找到了第二个文献：
Yurii K. Gun ko, Ute Cristmann, Vadim G. Kessler. Synthesis and Structure of the First FeII Heterometallic Alkoxide [(THF)NaFe(OtBu)3]2 - a Possible Precursor for New Materials.
Eur. J. Inorg. Chem, 2002, 1029-1031

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Synthesis and Structure of the First FeII Heterometallic Alkoxide [(THF)NaFe(OtBu)3]2 - a Possible Precursor for New Materials

多谢楼上二位啦