Formic Acid Dehydrogenation Catalysed by Tris(TPPTS) Ruthenium Species: Mechanism of the Initial "Fast" Cycle

Water-soluble ruthenium m-triphenylphosphinetrisulfonate (TPPTS) complexes are excellent catalysts for formic acid dehydrogenation. Interestingly, the choice of metal catalyst precursor has a direct influence on initial activities. The reaction with hexaaquaruthenium(II) tosylate directly yields bisphosphine complexes in the presence of TPPTS and formic acid, whereas trisphosphine adducts are involved if the reaction starts with ruthenium(III) chloride. We present the results of a series of manometric and spectroscopic experiments that reveal the true nature of these highly active species, and subsequently propose a rational "fast" cycle mechanism explaining this peculiar activity profile.


Published in:
Chemcatchem, 6, 11, 3146-3152
Year:
2014
Publisher:
Weinheim, Wiley-V C H Verlag Gmbh
ISSN:
1867-3880
Keywords:
Laboratories:




 Record created 2014-12-30, last modified 2018-09-13


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