Cationic gold (I) π-complexes of terminal alkynes and their conversion to dinuclear σ, π-acetylide complexes
TJ Brown, RA Widenhoefer
Index: Brown, Timothy J.; Widenhoefer, Ross A. Organometallics, 2011 , vol. 30, # 21 p. 6003 - 6009
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Citation Number: 64
Abstract
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-HC CAr)]+ 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 ...
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