New arylplatinum(II) complex containing di-2-pyridyl ketone (DPK) was formed through the reaction of [Pt(p-MeC6H4)2(SMe2)2] with DPK in 1:1 stoichiometry. The arylplatinum(IV) complex was synthesized during the oxidative addition reaction of [Pt(p-MeC6H4)2DPK] with MeI. In the arylplatinum(II) and (IV) complexes, DPK was coordinated to the platinum ion centers as a N,N-bidentate ligand with the two nitrogen atoms. Characterizations of these complexes were carried out using different techniques such as elemental analyses, 1H NMR, FT-IR, UV–Vis and conductometry. The Pt(II) complex structure, including N-chelating donor atoms, has been further determined by single crystal X-ray diffraction. Moreover, solvatochromism characteristics of the Pt(II) complex was studied. The conductance measurements revealed the non-electrolytic behavior of the complexes. The metal to ligand charge transfer (MLCT) band of the arylplatinum(II) complex in the visible region disappeared during the oxidative addition process due to the formation of organoplatinum(IV), and so the relevant changes in absorbance were used to determine the kinetic parameters of reaction in polar and nonpolar solvents, acetone and toluene, respectively. The oxidative addition reaction was performed under pseudo-first-order conditions. The rate constants (k2) and activation parameters were calculated. The obtained data were compared with each other in polar (with higher kinetic) and nonpolar solvents.