Targeted Synthesis of End-On Dinitrogen-Bridged Lanthanide Metallocenes and Their Reactivity as Divalent Synthons.

ABSTRACT: High-yield syntheses of the lanthanide dinitrogen complexes [(Cp₂^tttM)₂(μ-1,2-N₂)] (1_M, M = Gd, Tb, Dy; Cp^ttt = 1,2,4-C₅^tBu₃H₂), in which the [N₂]^2- ligands solely adopt the rare end-on or 1,2-bridging mode, are reported. The bulk of the tert-butyl substituents and the smaller radii of gadolinium, terbium, and dysprosium preclude formation of the side-on dinitrogen bonding mode on steric grounds. Elongation of the nitrogen-nitrogen bond relative to N₂ is observed in 1_M, and their Raman spectra show a major absorption consistent with N═N double bonds. Computational analysis of 1_Gd identifies th

SUBMITTER: Mondal A 

PROVIDER: S-EPMC10510326 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature