Synthesis of Arylbis[(triorganophosphine)gold(I)]oxoniuni Tetrafluoroborates [RO(AuPR′3)2]+BF4. Crystal Structure of (8-Quinolinyl)bis[(triphenylphosphine)gold(I)]oxonium Tetrafluoroborate

Andreas Kolb, Peter Bissinger, Hubert Schmidbaur

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Abstract

Potassium phenolate, PhOK+, was reacted with 2 equiv of a (triorganophosphine)gold(I) tetrafluoroborate, [R3PAu]+BF4, in THF to give novel oxonium salts of the type [PhO(AuPR3)2]+BF4 [R = Ph (2a), 2-MeC6H4 (2b), Et (2c)]. The compounds were obtained in good yields and have been characterized by NMR spectroscopy as well as mass spectrometry and elemental analysis. Treatment of potassium quinolin-8-olate with 2 equiv of (triphenylphosphine)gold(I) tetrafluoroborate also yields a dinuclear complex, [(C9H6N)O(AuPPh3)2]+BF4 (3). The cation of compound 3 appears to be fluxional in haloalkane solution at room temperature, with the quinolyl group interacting alternatingly with both gold atoms, but at low temperature the compound shows two inequivalent gold atoms. The unsymmetrical ground-state structure could be confirmed by a single-crystal X-ray diffraction study. Crystal data: 3·2C4H8O, triclinic P1̄ (No. 2), a = 12.721(1) Å, b = 14.381(1) Å, c = 14.730(1) Å, α = 92.69(1)°, β = 93.50(1)°, γ = 100.83(1)°, Z = 2, R (Rw) = 0.040 (0.045).

Original languageEnglish
Pages (from-to)5132-5135
Number of pages4
JournalInorganic Chemistry
Volume32
Issue number23
DOIs
StatePublished - 1993
Externally publishedYes

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