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(Pentamethylcyclopentadienyl)iridium‐PTA (PTA = 1,3,5‐Triaza‐7‐phosphaadamantane) Complexes and Their Application in Catalytic Water Phase Carbon Dioxide Hydrogenation
Author(s) -
Erlandsson Mikael,
Landaeta Vanessa R.,
Gonsalvi Luca,
Peruzzini Maurizio,
Phillips Andrew D.,
Dyson Paul J.,
Laurenczy Gábor
Publication year - 2008
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.200700792
Subject(s) - chemistry , iridium , catalysis , aqueous solution , medicinal chemistry , catalytic hydrogenation , hydrogen , carbonate , nuclear magnetic resonance spectroscopy , carbon dioxide , nuclear chemistry , inorganic chemistry , organic chemistry
The water‐soluble iridium(III) complexes [Cp*Ir(PTA)Cl 2 ] ( 1 ) and [Cp*Ir(PTA) 2 Cl]Cl ( 2 ) (PTA = 1,3,5‐triaza‐7‐phosphaadamantane) have been synthesised and characterised by spectroscopy and X‐ray crystallography. The complexes were evaluated as catalyst precursors for the hydrogenation of CO 2 and hydrogen carbonate in aqueous solutions, in the absence of amines or other additives, under relatively mild conditions. Complex 1 performed poorly while 2 catalyses the hydrogenation with moderate activity. The catalytically active monohydride [Cp*Ir(PTA) 2 H] + was identified by multinuclear NMR spectroscopy and its nature confirmed by independent synthesis. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)