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Synthesis and Characterization of New Water-Soluble Hydrides of RuII: A Step towards Dinitrogen Activation?

✍ Scribed by Maxime Loy; Gábor Laurenczy

Book ID
102260124
Publisher
John Wiley and Sons
Year
2005
Tongue
German
Weight
191 KB
Volume
88
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The basic aqueous coordination chemistry of Ru^II^ has been studied using the catalytically important TPPTS phosphine (TPPTS=trisodium salt of 3,3′,3″‐phosphinetriylbenzenesulfonic acid) and small gas molecules (H~2~, CO, N~2~) as ligands. As a result, new water‐soluble ruthenium mixed hydride complexes, presumably key species in many industrial catalytic processes, have been formed and identified. The Ru^II^ mixed hydrides were synthesized, and their formation was followed in situ by multinuclear NMR spectroscopy, pressurizing aqueous Ru^II^TPPTS systems with H~2~ and CO gas in sapphire NMR tubes. The formation equilibrium of these complexes is highly dependant on the temperature and the gas pressures. Under 50 atm of N~2~, the unique [RuH(CO)(N~2~)(TPPTS)~2~(H~2~O)]^+^ complex has been identified, which could be the first step toward dinitrogen activation.

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