The research focuses on the synthesis and characterization of novel platinum(II) complexes with pyrimidine-functionalized N-heterocyclic carbene (NHC) ligands, aiming to merge successful systems for the activation and functionalization of methane. The study involves the preparation of platinum(II) complexes with aryl and alkyl substituents through transmetalation using corresponding silver complexes. The reactants include imidazolium salts, Ag2O, and [(COD)PtCl2], with the synthesis carried out in dichloromethane or DMSO under specific conditions. The characterization of the complexes was performed using 1H and 13C-NMR spectroscopy, elemental analysis, and X-ray single crystal structures for five compounds. The complexes were tested for catalytic activity in methane activation but showed no significant catalytic activity under the tested conditions. The detailed analyses include melting points determination, NMR spectroscopy, and X-ray crystallography, with results indicating stable complexes under strong acidic conditions but without catalytic activity in methane oxidation.
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