Abstract
Cuboidal cluster aqua complex [Mo3(PdCl)S4(H2O)9]3+ in 4M HCl causes isomerization of (HO)2P(O)(H), (HO)P(O)(H)2, PhP(O)(OH)(H), and Ph2P(O)(H) into hydroxo tautomers P(OH)3, HP(OH)2, PhP(OH)2, and Ph2P(OH) which are stabilized by P coordination to the Pd atom in the cluster. The reactions were followed by 31P NMR and UV/Vis spectroscopy. Hypophosphorous acid H2P(O)(OH) in the presence of the cluster is rapidly oxidized into phosphorous acid; the reaction can be made catalytic. Coordination of PPh3 also takes place, giving [Mo3(Pd(PPh3))S4(H2O)5Cl4]⋅0.5CH3OH⋅3H2O, whose crystal structure was determined.
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Sokolov, M.N., Chubarova, E.V., Virovets, A.V. et al. Reactivity of Mo3PdS4+ 4 Cluster: Evidence for New Ligands PhP(OH)2 and Ph2P(OH) and Structural Characterization of [Mo3(Pd(PPh3))S4(H2O)5Cl4]⋅0.5CH3OH⋅3H2O. Journal of Cluster Science 14, 227–235 (2003). https://doi.org/10.1023/B:JOCL.0000005060.12513.23
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DOI: https://doi.org/10.1023/B:JOCL.0000005060.12513.23