Copper(I)-dioxygen reactivity in a sterically demanding tripodal tetradentate tren ligand: Formation and reactivity of a mononuclear copper(II) end-on superoxo complex

Yuki Kobayashi, Kei Ohkubo, Takashi Nomura, Minoru Kubo, Nobutaka Fujieda, Hideki Sugimoto, Shunichi Fukuzumi, Kei Goto, Takashi Ogura, Shinobu Itoh

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Abstract

Reaction of a copper(I) complex supported by a sterically demanding tripodal tetradentate ligand, HIPT3tren, and O2 gave a mononuclear copper(II) end-on superoxo complex. Spectroscopic (UV/Vis, resonance Raman, ESR, and 1H-NMR) and DFT studies have been performed. The O2-binding process as well as the reaction toward external substrates have been investigated kinetically to demonstrate the unique behavior of the copper(II) end-on superoxo complex, which may occur as a result of the existence of the hydrophobic core around the copper coordination sphere created by the HIPT3tren ligand.

Original languageEnglish
Pages (from-to)4574-4578
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number29
DOIs
StatePublished - Oct 2012

Keywords

  • Copper
  • Dioxygen activation
  • Enzyme models
  • Kinetics
  • Superoxide

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