Complexes of 3d Metals with a Bulky Carbazolyl Ligand

In this contribution, the synthesis and properties of nine novel 3d metal complexes are reported. As supporting ligand scaffold, the bulky 1,8-bis(3,5-ditertbutylphenyl)-3,6-ditertbutylcarbazole (R) was employed. After deprotonation and salt metathesis reactions, a series of four complexes, the dimeric [RMn(THF)(μ-Cl)]$_{2}$ (1 a), [RFe(THF)(μ-Cl)]$_{2}$ (2 a), and [RCo(THF)(μ-Cl)]$_{2}$ (3 a) as well as a monomeric [RCr(THF)$_{2}$(Cl)] (4 a), were obtained, while the analogous Ni(II) complex remained elusive. However, incorporation of PMe$_{3}$ as stronger donor molecule in comparison sufficed to stabilise also the Ni(II) complex [RNi(PMe$_{3}$)$_{2}$(Cl)] (5 b). The series was completed by treatment of 1 a–4 a with PMe$_{3}$, which afforded the related phosphine complexes 1 b–4 b. All complexes were characterised in the solid state by single crystal structure elucidation and their magnetic moments in solution were determined by NMR experiments with the Evans method.