“…The P‐ and N‐atoms‐bearing heterocycle can be combined with various metals in distinct oxidation states [3] . Research activities have particularly focused on cheap and abundant metals such as Mo, [4] Ni [2a,d,5] or Fe [2d,6] while also complexes with Mn, [2d] Co, [7] Cu, [8] V, [9] Cr, [10] W, [11] Pd, [4a] Au, [12] Ru, [13] Rh [14] or Pt [5a,15] were reported. Respective complexes have served as functional models for metalloenzymes, [5c,16] e. g., hydrogenases, [6a] or were used for the oxidation of alcohols [5d] or ammonia, [17] alkyne hydrofunctionalization, [6b] carbon dioxide activation [14] and dinitrogen reduction [10a] or as blue light emitters [8] .…”