precursor [Cu(MeCN)4]BF4 and the chelating DPEPhos ligand, under an argon atmosphere. After 4 hours of reaction, the solvent was removed under vacuum, and the three copper complexes were obtained as red powders. Lastly, the three mononuclear complexes formed crystals by slow diffusion of a cyclohexane layer into a concentrated dichloromethane solution, achieving high purity with reaction yields of 77% for 26a, 84% for 26b and 76% for 26c.