Attachment of a Hydrogen??Bonding Carboxylate Side Chain to an [FeFe]??Hydrogenase Model Complex: Influence on the Catalytic Mechanism

…, J Sun, T Åkermark, M Li, L Eriksson…

Index: Gao, Weiming; Sun, Junliang; Akermark, Torbjoern; Li, Mingrun; Eriksson, Lars; Sun, Licheng; Akermark, Bjoern Chemistry - A European Journal, 2010 , vol. 16, # 8 p. 2537 - 2546

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Citation Number: 5

Abstract

Abstract Azapropanedithiolate (adt)-bridged model complexes of [FeFe]-hydrogenase bearing a carboxylic acid functionality have been designed with the aim of decreasing the potential for reduction of protons to hydrogen. Protonation of the bisphosphine complexes 4– 6 has been studied by in situ IR and NMR spectroscopy, which revealed that protonation with triflic acid most likely takes place first at the N-bridge for complex 4 but at the Fe [ ...