Synergistic Cu₂ Catalysts for Formic Acid Dehydrogenation
2019
Nakajima, Takayuki | Kamiryo, Yoshia | Kishimoto, Masayo | Imai, Kaho | Nakamae, Kanako | Ura, Yasuyuki | Tanase, Tomoaki
Hexanuclear copper hydride complexes, [Cu₆(μ₃-H)₂(meso-L⁴)₃(RNC)₄](PF₆)₄ (R = ᵗBu (6a), Cy (6b)), were prepared by using a new linear tetraphosphine, meso-Ph₂PCH₂P(Ph)(CH₂)₄P(Ph)CH₂PPh₂ (meso-L⁴), and were converted into active catalysts of [Cu₂(μ-O₂CH)(meso-L⁴)(RNC)₂]⁺ under the reaction conditions of formic acid dehydrogenation, where unsymmetric dinuclear copper sites supported by the tetradentate phosphine and isocyanide ligands were essential to demonstrate effective catalytic activity.
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