Catalytic Dehydrogenation of Formic Acid with Ruthenium-PNP-Pincer Complexes: Comparing N-Methylated and NH-Ligands

Anastasiya Agapova, Elisabetta Alberico, Anja Kammer, Henrik Junge, Matthias Beller

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Complexes Ru(H)(Cl)(CO)(HN{CH 2 CH 2 P(iPr) 2 } 2 ) 7 and Ru(H)(Cl)(CO)(CH 3 N{CH 2 CH 2 P(iPr) 2 } 2 ) 8 were compared for the selective dehydrogenation (DH) of formic acid (FA) at different pH values. Remarkably, highest activities were observed in acidic environment (pH 4.5). Under all investigated conditions, the N-methylated complex 8 showed improved performance compared to 7. These observations can be mechanistically explained with protonation of 4H/3Me being the key step in formic acid DH for both complexes.

Original languageEnglish
Pages (from-to)1910-1914
Number of pages5
JournalChemCatChem
Volume11
Issue number7
DOIs
StatePublished - 4 Apr 2019
Externally publishedYes

Keywords

  • N−Me
  • dehydrogenation
  • formic acid
  • homogeneous catalysis
  • ruthenium pincer

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