Co-ordination chemistry of higher oxidation states. Part 29. Cobalt(III) complexes of bi- and tetra-thioethers: synthesis, properties, and cobalt-59 nuclear magnetic resonance data

Abstract

Open-chain tetrathioether complexes of cobalt(III)[CoLX₂] BPh₄[L = MeS(CH₂)_nS(CH₂)_mS(CH₂)_nSMe, n=m= 2; n= 3, m= 2; X = Cl, Br, or I] and unstable [Co(MeSCH₂CH₂SMe)₂X₂]BPh₄(X = Cl or Br) are formed by air oxidation of CoX₂ and the ligand in nitromethane. The CoS₆³⁺ complex [CoL¹(MeSCH₂CH₂SMe)][BF₄]₃[L¹= [graphic omitted]H₂)₃] is also described. Cobalt-59 n.m.r. data for these and [CoL¹X₂]⁺ are reported and discussed.