Intermediates Involved in the 2e-/2H+ Reduction of CO2 to CO by Iron(0) Porphyrin

Biswajit Mondal, Atanu Rana, Pritha Sen, Abhishek Dey

Research output: Contribution to journalArticlepeer-review

106 Scopus citations


The reduction of CO2 by an iron porphyrin complex with a hydrogen bonding distal pocket involves at least two intermediates. The resonance Raman data of intermediate I, which could only be stabilized at -95 °C, indicates that it is a Fe(II)-CO22- adduct and is followed by an another intermediate II at -80°C where the bound CO2 in intermediate I is protonated to form a Fe(II)-COOH species. While the initial protonation can be achieved using weak proton sources like MeOH and PhOH, the facile heterolytic cleavage of the C-OH bond in intermediate II requires strong acids.

Original languageEnglish
Pages (from-to)11214-11217
Number of pages4
JournalJournal of the American Chemical Society
Issue number35
StatePublished - 9 Sep 2015
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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