Due to its high stability and its versatility as starting material in the synthesis of useful compounds, ferrocene plays a key role in many areas of research, and extensive chemistry associated with ferrocene has been published. 1 An important advantage of the ferrocene-containing complexes is that their electron-donor ability may be fine-tuned by the choice of number and nature of the substituents. 2 Thus, the synthesis of ferrocenes with tailor-made properties has been a ...