Dicationic lutetium hydride complex stabilized by a meta-cyclophane-derived (NNNC)-type macrocycle

• A new monoanionic (NNNC)-type macrocyclic ligand is introduced.
• Metalation of the phenyl group within the macrocycle is observed.
• A series of neutral rare earth metal complexes is presented.
• A dimeric cationic lutetium hydride is synthesized and characterized.

The meta-azacyclophane (Me3TAMC)H (=2,5,8-trimethyl-2,5,8-triaza-meta-cyclophane) reacted with the rare earth metal tris(trimethylsilylmethyl) complex [Ln(CH2SiMe3)3(THF)2] (Ln = Sc, Y, Lu) in THF or benzene to give a Cs-symmetric bis(trimethylsilylmethyl) complex [Ln(Me3TAMC)(CH2SiMe3)2]. The tetradentate (NNNC)-type ligand is formed by metalation of the phenyl group within the macrocycle. In the case of lutetium, abstraction of an alkyl group followed by the treatment of dihydrogen gave the dimeric cationic hydride complex [{(Me3TAMC)Lu(μ-H)(THF)}2][B(3,5-C6H3Cl2)4]2 that was characterized by single-crystal X-ray crystallography.

Dimeric cationic hydride complex [{(Me3TAMC)Lu(μ-H)(THF)}2][B(3,5-C6H3Cl2)4]2 that contain a new (NNNC)-type ligand was prepared and characterized by single-crystal X-ray crystallography.Figure optionsDownload as PowerPoint slide