Dinitrogen fixation and transformation by transition metals is among the most challenging issues in chemistry. Recently we reported a series of chromium and iron dinitrogen complexes bearing cyclopentadienyl-phosphine ligands. In order to complete our previous study and modification of ligand framework, we changed metal center (from Cr, Fe to Co) and linker (from aryl linker to alkyl linker) between Cp moiety and phosphine moiety. In this work, we report the synthesis and characterization of cobalt chlorides and cobalt dinitrogen complexes bearing cyclopentadienyl-phosphine ligands. Reduction of the cobalt chlorides bearing different linkers generated different cobalt bis(dinitrogen) complexes: C-P bond cleavage product (aryl linker) and ligand rearrangement product (alkyl linker).

Cobalt cyclopentadienyl-phosphine dinitrogen complexes

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