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Synthesis and Characterization of New Bis(N-heterocyclic) Carbene Platinum (II) Complexes: Study of Stability and Reactivity in C-H Activation

Hoseinmardi, Sussan | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45409 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Jamali, Sirous
  7. Abstract:
  8. Preparation of two new Bis-N-heterocyclic carbene (Bis-NHC) platinum (ІІ) complexes have been described. The reaction of the Bis-NHC complex [PtMe2(Bis-NHC)], 1, in which Bis-NHC = 1,1’-methylene-3,3’-di(tert-Bu)imidazole ylidene, with two equivalent trifluoroacetic acid give the new Bis-NHC platinum [Pt(Bis-NHC)(CF3COO)2], 2. Complex 2 has been characterized by multinuclear NMR spectroscopy in solution and its solid state structure determined using X-ray crystallography. The mono-methyl Bis-NHC platinum(ІІ) complex, {PtMe(Bis-NHC)[OHB(C6F5)3]}, 3, has been prepared by the reaction of one equivalent B(C6F5)3 with [PtMe2(Bis-NHC)], 1. The mono-methyl complex 1 has a labile ligand OHB(C6F5)3 and characterized by NMR spectroscopy in solution. Stability and reactivity of 3 in intramolecular C-H activation and C-H activation in benzene molecule have been investigated and reactions have been monitored using 1H NMR spectroscopy in an inert atmosphere at 50 °C
  9. Keywords:
  10. Platinum ; N-Heterocyclic Carbene ; Protonation

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