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- W2060697970 abstract "A new organodiplatinum(II) complex cis,cis-[Me2Pt(μ-NN)(μ-dppm)PtMe2] (1), in which NN = phthalazine and dppm = bis(diphenylphosphino)methane, is synthesized by the reaction of cis,cis-[Me2Pt(μ-SMe2)(μ-dppm)PtMe2] with 1 equiv of NN. Complex 1 has a 5dπ(Pt) → π*(imine) metal-to-ligand charge-transfer band in the visible region, which was used to easily follow the kinetics of its reaction with MeI. Meanwhile, the complex contains a robust bridging dppm ligand that holds the binuclear integrity during the reaction. A double MeI oxidative addition was observed, as shown by spectrophotometry and confirmed by a low-temperature 31P NMR study. The classical SN2 mechanism was suggested for both steps, and the involved intermediates were suggested. Consistent with the proposed mechanism, the rates of the reactions at different temperatures were slower in benzene than in acetone and large negative ΔS⧧ values were found in each step. However, some abnormalities were observed in the related rate constants and ΔS⧧ values, which were demonstrated to be due to the associative involvement of the polar acetone molecules in the reactions. The rates are almost 6 times slower in the second step as compared to the first step because of the electronic effects transmitted through the ligands and the steric effects." @default.
- W2060697970 created "2016-06-24" @default.
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- W2060697970 date "2005-10-06" @default.
- W2060697970 modified "2023-09-23" @default.
- W2060697970 title "Oxidative Addition of Methyl Iodide to a New Type of Binuclear Platinum(II) Complex: a Kinetic Study" @default.
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- W2060697970 doi "https://doi.org/10.1021/ic0511064" @default.
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