Attempts to prepare hexafluoroacetylacetonate (hfac) piano stool complexes of pentamethylcyclopentadienyl Cp* iridium and rhodium led to a surprising array of unexpected products. The desired complex, Cp*M(hfac)Cl, was obtained following the reaction of sodium hexafluoroacetylacetonate (hfacNa) with [Cp*MCl₂]₂ in dichloromethane. Variations of this synthetic method resulted in twelve unique crystallographically identified products, eleven of which contain the hfac ligand or a trifluoroacetylacetonate (TFA) ligand, either coordinated to the metal or as a non-coordinating anion. Five dinuclear Cp* iridium hydroxo-bridged products with various fluorinated non-coordinating anions were obtained. The most intriguing two complexes are trinuclear Cp*Ir^III hydroxo-bridged clusters that have, at their core, an Ir₃NaO₄ cubane structure. Attempts to devise rational syntheses of the hydroxo-bridged cluster compounds were not successful. Generation of the TFA moieties likely occurred following degradation of Cp*Ir(hfac)Cl. The reaction between [Cp*MCl₂]₂ and 1,1,1-trifluoroacetylacetonate (tfac) proceeded as expected to give Cp*M(tfac)Cl with no observed side product formation, indicating that the metal-coordinated tfac moiety is significantly more stable than the metal-coordinated hfac moiety.

尝试制备五甲基环戊二烯基Cp *铱和铑的六氟乙酰丙酮（hfac）钢琴凳配合物导致了一系列意想不到的产品。六氟乙酰丙酮酸钠（hfacNa）与[Cp * MCl ₂ ] ₂在二氯甲烷中反应后，得到所需的络合物Cp * M（hfac）Cl 。这种合成方法的变化产生了十二种独特的晶体学鉴定产物，其中十一种包含与金属配位或作为非配位阴离子的hfac配体或三氟乙酰丙酮（TFA）配体。获得了五种具有各种氟化非配位阴离子的双核Cp *铱羟基桥接产物。最吸引人的两个复合物是三核Cp * Ir ^III羟基桥接的簇，其核心具有Ir ₃ NaO ₄古巴结构。尝试设计羟基桥接簇化合物的合理合成方法是不成功的。在Cp * Ir（hfac）Cl降解后，可能发生了TFA部分。[Cp * MCl ₂ ] ₂与1,1,1-三氟乙酰丙酮（tfac）之间的反应按预期进行，得到Cp * M（tfac）Cl，没有观察到副产物形成，表明金属配位的tfac部分明显比金属配位的hfac部分更稳定。