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Catalytic Dehydrogenation of Formic Acid with Ruthenium‐PNP‐Pincer Complexes: Comparing N‐Methylated and NH‐Ligands
Author(s) -
Agapova Anastasiya,
Alberico Elisabetta,
Kammer Anja,
Junge Henrik,
Beller Matthias
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201801897
Subject(s) - dehydrogenation , formic acid , pincer movement , chemistry , catalysis , ruthenium , protonation , medicinal chemistry , inorganic chemistry , organic chemistry , ion
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.