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      N-Heterocyclic carbene gold(I) and silver(I) adducts of [Pt₂(μ-S)₂(PPh₃)₄]

      Henderson, William; Oliver, Allen G.
      DOI
       10.1016/j.ica.2011.08.032
      Link
       www.sciencedirect.com
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      Henderson, W. & Oliver, A.G. (2011). N-Heterocyclic carbene gold(I) and silver(I) adducts of [Pt₂(μ-S)₂(PPh₃)₄]. Inorganica Chimica Acta, 378(1), 121-126.
      Permanent Research Commons link: https://hdl.handle.net/10289/6038
      Abstract
      Reaction of the metalloligand [Pt₂(μ-S)₂(PPh₃)₄] with the N-heterocyclic carbene (NHC) complexes IPrAuCl, IMesAuCl and IMesAgCl in methanol gave the first examples of metal adducts of [Pt₂(μ-S)₂(PPh₃)₄] that contain NHC ligands, namely [Pt₂(μ-S) ₂ (PPh₃)₄AuL]⁺ (L = IPr, IMes) and [Pt₂(μ-S)₂(PPh₃)₄AgIMes]⁺. The complexes were isolated as hexafluorophosphate salts. Reaction of [Pt₂(μ-S)₂(PPh₃)₄] with excess IPrAuCl in refluxing methanol yielded only the mono-adduct, in contrast to the behaviour with the gold(I) phosphine complex Ph₃PAuCl, which undergoes double addition giving [Pt₂(μ-SAuPPh₃)₂(PPh₃)₄]²⁺. The X-ray structure of [Pt₂(μ-S) ₂(PPh₃)₄AuIPr]PF₆ was determined and reveals that the ‘free’ sulfide is substantially sterically protected by the IPr ligand, accounting for the low reactivity towards addition of a second AgIPr⁺ moiety.
      Date
      2011-11-30
      Type
      Journal Article
      Publisher
      Elsevier
      Collections
      • Science and Engineering Papers [3019]
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