Synthesis and characterization of palladium and nickel complexes with positively charged triphosphine ligands and their use as electrochemical CO2-reduction catalysts

Alex Miedaner, Bruce C. Noll, Daniel L DuBois

Research output: Contribution to journalArticle

29 Citations (Scopus)


The synthesis and characterization of [M(Bu3P+etpE)Br](BF4)2 (where M = Ni or Pd and Bu3P+etpE = [(Bu3PCH2CH2)P(CH2CH 2PEt2)2]+) and [M(etpPBu3 +)Br]Br(BF4)4 (where M = Ni or Pd and etpPBu3 + = {PhP[CH2CH2P(CH2CH2PBu 3)2]2}4+) are described. The structure of [Ni(etpPBu3 +)Br]Br(BF4)4 has been determined by X-ray diffraction. Treatment of [Pd-(Bu3P+etpE)Br](BF4)2 with AgBF4 in acetonitrile produced [Pd(Bu3P+etpE)(CH3CN)](BF4) 3. The latter compound has also been characterized by single-crystal X-ray diffraction methods. Electrochemical studies indicate that this compound and its closely related methyl analog, [Pd(Me3P+etpE)(CH3CN)](BF4) 3, are catalysts for the electrochemical reduction of CO2 to CO in acidic dimethylformamide solutions. Kinetic and mechanistic studies of this catalytic reaction are reported.

Original languageEnglish
Pages (from-to)5779-5791
Number of pages13
Issue number26
Publication statusPublished - Dec 23 1997


ASJC Scopus subject areas

  • Inorganic Chemistry
  • Organic Chemistry

Cite this