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. 2014 Jan 22;136(3):924-6.
doi: 10.1021/ja410756b. Epub 2014 Jan 10.

Direct observation of reduction of Cu(II) to Cu(I) by terminal alkynes

Guanghui Zhang  1 , Hong Yi, Guoting Zhang, Yi Deng, Ruopeng Bai, Heng Zhang, Jeffrey T Miller, Arthur J Kropf, Emilio E Bunel, Aiwen Lei
Affiliations

Direct observation of reduction of Cu(II) to Cu(I) by terminal alkynes

Guanghui Zhang et al. J Am Chem Soc. .

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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