Gold Coordination by Tertiary Phosphane Sulfides

Max Preisenberger, Andreas Bauer, Hubert Schmidbaur

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12 Scopus citations

Abstract

Treatment of the ditertiary phosphane sulfides (CH2)n[PPh2S]2, 1a-1d, n = 1-4, with equivalent amounts of (dimethylsulfide)gold(I) chloride (Me2S)AuCl affords the dinuclear complexes 2a-2d with an AuCl unit attached to each sulfur atom. The chlorides can be converted into the bromides 3a-3c by metathesis using KBr, or by reacting Id with (tetrahydrothiophene)gold bromide. With [(Ph3P)Au]+ O3SCF3- as the aurating agent for the diphosphane disulfides, the corresponding dicationic products are obtained: {(CH2)n[SPPh2AuPPh3] 2}2+·2 O3SCF3- (4b-4d, n = 2-4). An excess of the reagents does not lead to polygold clustering at the sulfur atoms, and P-S cleavage occurs instead to give sulfonium salts {S[Au(PPh3)]3)+ X-. The reaction of Ph3PS with equimolar quantities of [(Ph3P)Au]O3SCF3 leads to the cationic 1:1 complex 5, and with an excess of the agent the P-S bond is ruptured. The structures of compounds 4b and 4d were determined by single-crystal X-ray diffraction. The dications have crystallographic centers of inversion, the coordination at the gold atoms is linear [4b: 179.03(3)°; 4d: 175.29(2)°] and the angles at the sulfur atoms are acute [4b: 97.76(4)°; 4d: 96.37(3)°], but there are no short Au-Au contacts.

Original languageEnglish
Pages (from-to)955-958
Number of pages4
JournalChemische Berichte
Volume130
Issue number7
DOIs
StatePublished - 1997
Externally publishedYes

Keywords

  • Gold(i) complexes
  • Phosphane sulfides
  • Phosphorus
  • Sulfide coordination
  • Sulfur

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