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

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Abstract

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
JournalOrganometallics
Volume16
Issue number26
Publication statusPublished - Dec 23 1997

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Palladium
Nickel
palladium
nickel
Ligands
catalysts
X ray diffraction
Dimethylformamide
ligands
Catalysts
Carbon Monoxide
synthesis
diffraction
acetonitrile
x rays
Single crystals
analogs
Kinetics
single crystals
kinetics

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Organic Chemistry

Cite this

Synthesis and characterization of palladium and nickel complexes with positively charged triphosphine ligands and their use as electrochemical CO2-reduction catalysts. / Miedaner, Alex; Noll, Bruce C.; DuBois, Daniel L.

In: Organometallics, Vol. 16, No. 26, 23.12.1997, p. 5779-5791.

Research output: Contribution to journalArticle

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