[(IPr)Cu(HBPh3)] (IPr=1,3‐bis(2,6‐diisopropylphenyl)imidazol‐2‐ylidene) with good thermal stability. Although this compound displays a contact ion‐pair structure, CuIH‐like catalytic activity was envisaged in carbonyl hydrosilylation. Sufficient moisture stability allowed the catalysis in aqueous/organic media. Mechanistic study further showed that a phenyl group on the borate anion is abstracted by [(IPr)Cu]+
氧化还原不稳定的氢化三苯
硼酸亚
铜被分离为具有良好热稳定性的N-杂环卡宾加合物[(IPr)Cu(HBPh 3)](IPr = 1,3-双(2,6-二异丙基苯基)
咪唑-2-亚基)。尽管该化合物显示出接触离子对结构,但在羰基氢化
硅烷化中仍可看到类似Cu I H的催化活性。足够的
水分稳定性允许在
水/有机介质中催化。机理研究进一步表明,[(IPr)Cu] +提取
硼酸根阴离子上的苯基,得到阳离子
有机铜络合物[(IPr)2 Cu 2(μ-Ph)] [BPh 4 ]。