Reactivity of a new aryl cycloplatinated(ii) complex containing rollover 2,2′-bipyridine: N -oxide toward a series of diphosphine ligands

Shahsavari, H. R ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1039/c8nj00713f
  3. Abstract:
  4. Reaction of the electron-rich complex cis-[Pt(p-Me-C6H4)2(SMe2)2] with 2,2′-bipyridine N-oxide, O-bpy occurred by rollover cyclometalation to afford complex [Pt(O-bpy)(p-Me-C6H4)(SMe2)], 1. The obtained complex was characterized using NMR spectroscopy and its solid state structure was determined by the single crystal X-ray diffraction method. The reaction of 1 with seven diphosphine ligands, 1,1-bis(diphenylphosphino)methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe), 1,3-bis(diphenylphosphino)propane (dppp), 1,4-bis(diphenylphosphino)butane (dppb), N,N-bis(diphenylphosphino)amine (dppa), 1,2-bis(diphenylphosphino)benzene (dppbz) and 1,1′-bis(diphenylphosphino)ferrocene (dppf), in different molar ratios (1:1 or 1:0.5; 1:diphosphines) was studied. In accordance with the reaction conditions, the analogous mononuclear or binuclear diphosphine cycloplatinated complexes were yielded. The diphosphines behave as a monodentate (dppm and dppa), a bridging (dppm, dppa, dppe, dppp, dppb and dppf) or a chelated (dppe, dppp and dppbz) ligand. These behaviors depend on the bite angle of the diphosphine ligands, and the flexibility or rigidity of the alkyl and aromatic backbone between the two phosphine groups. All diphosphine platinum complexes were characterized using NMR spectroscopy and the crystal structures of some complexes were solved by X-ray diffraction. © 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique
  5. Keywords:
  6. Bipyridine derivative ; Phosphine derivative ; Chemical structure ; Nuclear magnetic resonance spectroscopy ; Priority journal ; Solid state ; Synthesis ; X ray diffraction
  7. Source: New Journal of Chemistry ; Volume 42, Issue 11 , 2018 , Pages 9159-9167 ; 11440546 (ISSN)
  8. URL: https://pubs.rsc.org/en/content/articlelanding/2018/nj/c8nj00713f/unauth#!divAbstract