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Issue 44, 2016
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Iridium(III) hydrido complexes for the catalytic dehydrogenation of hydrazine borane

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Abstract

The synthesis of 3,5-disubstituted cyclometalated iridium(III) hydrido complexes of the type [3,5-R2(POCOP)IrHX] (3,5-R2(POCOP) = κ3-C5HR2-2,6-(OPtBu2)2 with R = t-Bu, COOMe; X = Cl, H) is described. All complexes were investigated in the catalytic dehydrogenation of hydrazine borane and compared with the unsubstituted compounds [(POCOP)IrHX] (X = Cl, H). All catalysts are highly active and recyclable, clearly maintaining hydrogen production activity. The dehydrogenation products were structurally characterised by solid state NMR and FTIR spectroscopy. Experimental observations were complemented by a dispersion-corrected DFT study to rationalise the mechanism of hydrazine borane dehydrogenation.

Graphical abstract: Iridium(iii) hydrido complexes for the catalytic dehydrogenation of hydrazine borane

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Publication details

The article was received on 02 Aug 2016, accepted on 11 Oct 2016 and first published on 11 Oct 2016


Article type: Paper
DOI: 10.1039/C6DT03068H
Citation: Dalton Trans., 2016,45, 17697-17704
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    Iridium(III) hydrido complexes for the catalytic dehydrogenation of hydrazine borane

    D. Han, M. Joksch, M. Klahn, A. Spannenberg, H.-J. Drexler, W. Baumann, H. Jiao, R. Knitsch, M. R. Hansen, H. Eckert and T. Beweries, Dalton Trans., 2016, 45, 17697
    DOI: 10.1039/C6DT03068H

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