Synthesis and characterization of 15N-labeled tetranuclear Ir complexes via Li2C15N2†

Abstract

The synthesis of ¹⁵N-labeled organometallic complexes is challenging due to limited suitable ¹⁵N-labeled precursors. Herein, we report the preparation of a ¹⁵N-labeled tetranuclear iridium complex, ¹⁵N-1, from Li₂C¹⁵N₂, with nitrogen atoms originally from ¹⁵N₂ gas. Mono-methylation and single-electron oxidation of ¹⁵N-1 yield the corresponding ate complexes, ¹⁵N-2 and ¹⁵N-3. These complexes were characterized by ¹H, ¹³C, and ¹⁵N NMR spectroscopy and X-ray diffraction.