Abstract
AbstractThe basic aqueous coordination chemistry of RuII has been studied using the catalytically important TPPTS phosphine (TPPTS=trisodium salt of 3,3′,3″‐phosphinetriylbenzenesulfonic acid) and small gas molecules (H2, CO, N2) 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 RuII mixed hydrides were synthesized, and their formation was followed in situ by multinuclear NMR spectroscopy, pressurizing aqueous RuIITPPTS systems with H2 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 N2, the unique [RuH(CO)(N2)(TPPTS)2(H2O)]+ complex has been identified, which could be the first step toward dinitrogen activation.
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