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      Further investigations on the methylation chemistry of [Pt₂(μ-S)₂(PPh₃)₄]

      Henderson, William; Nicholson, Brian K.; Ujam, Oguejiofo Theophilus
      DOI
       10.1080/00958972.2011.606366
      Link
       www.tandfonline.com
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      Citation
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      Henderson, W., Nicholson, B.K. & Ujam, O.T. (2011). Further investigations on the methylation chemistry of [Pt₂(μ-S)₂(PPh₃)₄]. Journal of Coordination Chemistry, 64(16), 2771-2781.
      Permanent Research Commons link: https://hdl.handle.net/10289/5695
      Abstract
      The methylation product of the reaction between [Pt₂(µ-S)₂(PPh₃)₄] and MeI in diethyl ether has been reinvestigated using positive-ion electrospray mass spectrometry and found to be contaminated with the dimethylated iodide-containing complex [Pt₂(µ-SMe)₂(PPh₃)₃I]⁺, which is believed to be formed early in the reaction. New, facile routes to the monomethylated complex [Pt₂(µ-S)(µ-SMe)(PPh₃)₄]⁺ have been developed using mild methylating agents. Heating [Pt₂(µ-S)₂(PPh₃)₄] in neat dimethyl methylphosphonate results in rapid and selective conversion to [Pt₂(µ-S)(µ-SMe)(PPh₃)₄]⁺; methylation with Me₃S⁺OH⁻ in refluxing methanol also affords pure [Pt₂(µ-S)(µ-SMe)(PPh₃)₄]⁺, isolated as its hexafluorophosphate salt. The X-ray structure of the previously reported complex [Pt₂(µ-SMe)₂(PPh₃)₂I₂] has also been undertaken.
      Date
      2011
      Publisher
      Taylor & Francis
      Collections
      • Science and Engineering Papers [3084]
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