Cationic Gold(I) π-Complexes of Terminal Alkynes and Their Conversion to Dinuclear σ,π-Acetylide Complexes
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https://figshare.com/articles/dataset/Cationic_Gold_I_Complexes_of_Terminal_Alkynes_and_Their_Conversion_to_Dinuclear_Acetylide_Complexes/2585728
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资源简介：
Treatment of a suspension of (IPr)AuCl [IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene]
and AgSbF6 with terminal arylacetylenes led to the formation
of thermally unstable gold π-alkyne complexes of the form [(IPr)Au(η2-HCCAr)]+SbF6– in ≥86 ± 5% yield, which were characterized by spectroscopy
without isolation. Warming these complexes to 0 °C led to C(sp)–H
bond cleavage and formation of dinuclear gold(I) σ,π-acetylide
complexes of the form {[(IPr)Au]2(η1,η2-CCAr)}+SbF6–, three of which
were isolated in 99% yield and one of which was characterized by X-ray
crystallography. 1H NMR analysis of the conversion of gold
π-arylacetylene complexes to σ,π-acetylide complexes
established protonation of free arylacetylene, indicating the generation
of a strong Brønsted acid under reaction conditions.
创建时间：
2016-02-22
