Direct Observation of Reduction of Cu(II) to Cu(I) by Terminal Alkynes
Journal of the American Chemical Society2014Vol. 136(3), pp. 924–926
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Guanghui Zhang, Hong Yi, Guoting Zhang, Yi Deng, Ruopeng Bai, Heng Zhang, Jeffrey T. Miller, A. Jeremy Kropf, Emilio E. Bunel, Aiwen Lei
Abstract
X-ray absorption spectroscopy and in situ electron paramagnetic resonance evidence were provided for the reduction of Cu(II) to Cu(I) species by alkynes in the presence of tetramethylethylenediamine (TMEDA), in which TMEDA plays dual roles as both ligand and base. The structures of the starting Cu(II) species and the obtained Cu(I) species were determined as (TMEDA)CuCl2 and [(TMEDA)CuCl]2 dimer, respectively.
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