Abstract: | The novel complexes CpFe(CO)(COR)P(C6H5)2NR'R* with Cp = C5H5,C9H7 (indenyl); R = CH3, C2H5, CH(CH3)2, CH2C6H5;R` = H, CH3, C2H5, CH2C6H5 and R* = (S)-CH(CH3)(C6H5), have been synthesized by reaction of CpFe(CO)2R wiht P(C6H5)2NR`R* and characterized analytically as well as spectroscopically. The pairs of diastereoisomers RS/SS have been separated by preparative liquid chromatography and fractional crystallization, respectively. The optically pure complexes (+)436- und ()436-CpFe(CO)(COR)P(C6H5)2NR`R* are configurationally stable at room temperature. At higher temperatures they equilibrate with CpFe(CO)2R and epimerize with respect to the Fe configuration. |