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Reactivity of a New Aryl Cycloplatinated(II) Complex Containing Rollover 2,2´-Bipyridine N-Oxide toward a Series of Diphosphine Ligands

Abstract

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 through 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 ratio (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, dppa), a bridging (dppm, dppa, dppe, dppp, dppb, dppf) or a chelated (dppe, dppp, dppbz) ligand. These behaviors depended on the bite angle of the diphosphine ligands, flexibility or rigidity of alkyl and aromatic backbone between two phosphine groups. All diphosphine platinum complexes were characterized by NMR and the crystal structures of some complexes solved by X-ray diffraction.

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Publication details

The article was received on 10 Feb 2018, accepted on 13 Apr 2018 and first published on 13 Apr 2018


Article type: Paper
DOI: 10.1039/C8NJ00713F
Citation: New J. Chem., 2018, Accepted Manuscript
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    Reactivity of a New Aryl Cycloplatinated(II) Complex Containing Rollover 2,2´-Bipyridine N-Oxide toward a Series of Diphosphine Ligands

    H. R. Shahsavari, R. Babadi Aghakhanpour, M. Hossein-Abadi, R. Kia, M. R. Halvagar and P. R. Raithby, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ00713F

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