Flipping of the coordinated triazine moiety in Cu(i)–L2and the small electronic factor, κel, for direct outer-sphere cross reactions: syntheses, crystal structures and redox behaviour of copper(ii)/(i)–L2complexes (L = 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine)

Flipping of the triazine ring of the coordinated pdt ligand was observed, and the non-adiabaticity factorκelfor direct cross reactions was estimated asca.10−7.