When comparing the 1 H NMR spectra of all complexes elucidated above, a complexationdependent shift of the isolated hydrogen atoms of the pyrazine and triazole is visible, showing the power of NMR screening techniques to distinguish between coordination modes (see Figure , Supporting Information). Depending on the involvement of the quinoxaline unit in the complex, the pyrazine hydrogen atom is de-shielded or more shielded than the ligand.