Syntheses, X-ray crystal structures, and solution behavior of monomeric, cationic, two-coordinate gold(I) pi-alkene complexes.

Syntheses, X-ray crystal structures, and solution behavior of monomeric, cationic, two-coordinate gold(I) pi-alkene complexes.
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DOI:
10.1021/ja9015827
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发表时间:
2009-05-13
影响因子:
15
通讯作者:
Widenhoefer RA
Widenhoefer RA
中科院分区:
化学1区
文献类型:
--
作者:
Brown TJ;Dickens MG;Widenhoefer RA

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将(IPr)AuCl [IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidine]和AgSbF 6(1:1)的悬浮液与异丁烯在室温下处理12小时,得到[(NHC)Au(η2-H2 C <$CMe2)]+ SbF 6 −(1a),产率为98%,其特征在于光谱学和X射线晶体学。采用类似于分离1a的方法分离出了一些阳离子金π-烯烃配合物,其中两个通过X射线晶体学进行了分析。光谱学、X射线晶体学和烯烃结合研究都与金-(π-烯烃)相互作用的结果雅阁,这种相互作用主要是烯烃向金提供σ-。
Treatment of a suspension of (IPr)AuCl [IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidine] and AgSbF6(1:1) with isobutylene at room temperature for 12 h led to isolation of [(NHC)Au(η2-H2CCMe2)]+SbF6−(1a) in 98% yield, which was characterized by spectroscopy and X-ray crystallography. A number of cationic gold π-alkene complexes were isolated employing a procedure similar to that used to isolate1a, two of which were analyzed by X-ray crystallography. Spectroscopy, X-ray crystallography, and alkene binding studies were in accord with a gold−(π-alkene) interaction dominated by σ-donation from the alkene to gold.
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