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Transfer Hydrogenation Catalysis by a N‐Heterocyclic Carbene Iridium Complex on a Polyoxometalate Platform
Author(s) -
Modugno Gloria,
Monney Angele,
Bonchio Marcella,
Albrecht Martin,
Carraro Mauro
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402020
Subject(s) - polyoxometalate , chemistry , iridium , transfer hydrogenation , carbene , catalysis , cyclic voltammetry , organometallic chemistry , photochemistry , spectroscopy , infrared spectroscopy , turnover number , combinatorial chemistry , polymer chemistry , organic chemistry , ruthenium , electrochemistry , physics , electrode , quantum mechanics
A divacant Keggin polyanion has been decorated with a N‐heterocyclic carbene (NHC) iridium(I) organometallic complex to provide a molecular model of an Ir‐based supported catalyst. The characterization of the hybrid compound has been performed by multinuclear NMR spectroscopy, infrared spectroscopy, cyclic voltammetry, and mass spectroscopy, and the results are in agreement with a bisfunctionalization of the polyoxometalate scaffold. The resulting supported homogeneous complex has been successfully used to catalyze the transfer hydrogenation from i PrOH to benzophenone [with a turnover number (TON) of 680 and a turnover frequency (TOF) of up to 540 h –1 ].