Investigating a Redox Active Samarium Complex in Catalytic Reactions

Herein the synthesis of a new ethynyl ferrocenyl amidinate ligand [Fc−C≡C-{C(Ndipp)$_{2}$H}] (Fc=ferrocenyl; dipp=diisopropylphenyl) and the subsequent formation of the corresponding samarium amido complex [Sm{Fc−C≡C-[C(Ndipp)$_{2}$$_{2}$]}$_{2}${N(SiMe$_{3}$3)$_{2}$}] is reported. [Fc−C≡C-{C(Ndipp)2H}] and [Sm{Fc−C≡C-[C(Ndipp)$_{2}$]}$_{2}${N(SiMe$_{3}$)$_{2}$}] were fully characterized including the study of the complex’ redox properties by cyclovoltammetry. Furthermore, we investigated the catalytic properties of the samarium complex in the intramolecular hydroamination reaction and intermolecular dehydrocoupling of pinacol borane with various amines