geometry. Fe–P bond distances are the same at 2.1932(8) Å in 2a and 2b, respectively. Thus, contrary to what was expected, X-ray data could not be used to quantitatively differentiate between the two phosphine ligands in 2a and 2b. Therefore, additional spectroscopic techniques such as IR and NMR were employed. Similarly, the Fe–C bond lengths of the carbonyl (Fe–CO) and acetyl (Fe–COMe) are 1.748(3) and
环戊二烯基二羰基甲基
铁[CpFe(CO)2 Me](1)在等位
膦配体P(4-FC 6 H 4)3和P(4-MeC 6 H 4)3的作用下,发生迁移性羰基插入。反应产物[CpFe(CO)(COMe)P(4-FC 6 H 4)3 ](2a)和[CpFe(CO)(COMe)P(4-MeC 6 H 4)3 ](2b)),通过X射线晶体学表征。在这两种结构中,
铁原子均采用伪八面体配位几何形状。在2a和2b中,Fe-P的键距分别为2.1932(8)Å 。因此,与预期相反,X射线数据不能用于定量区分2a和2b中的两个
膦配体。因此,采用了其他光谱技术,例如IR和NMR。同样,羰基(FE-CO)和乙酰基中的Fe-C键长(
铁来)是1.748(3)和1.955(3)在图2a,和1.744(3)和1.951(3)在图2b,分别。