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- W1976523276 abstract "Treatment of OsO4 (1) with 2,2′-biimidazole (H2biim) (2) in a methanol/acetone mixture, and in the presence of nitric acid produces the novel dioxoosmium(VI) complex [OsO2(H2biim)2](NO3)2·CH3OH (3). Addition of 2 equiv. of PPh3 (4) and 1 equiv. of nitric acid to 3 affords mononuclear [Os(H2biim)2(O=PPh3)2](NO3)3 (5) by a redox reaction which involves the transfer of oxygen from osmium to PPh3. The X-ray crystal structure of 5 reveals an octahedral coordination sphere around the osmium(III) centre. This occurs as a result of the two H2biim chelating ligands in the equatorial positions and two datively bonded phosphane oxide groups O=PPh3 in the axial positions. Hydrogen bonds are responsible for the formation of a polymeric structure in the solid state. The latter complex reacts with KOH to form monocationic [Os(Hbiim)2(O=PPh3)2]NO3 (6)." @default.
- W1976523276 created "2016-06-24" @default.
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- W1976523276 date "2001-09-01" @default.
- W1976523276 modified "2023-09-23" @default.
- W1976523276 title "The Dioxoosmium(VI) Complex [OsO2(H2biim)2](NO3)2 as Oxygen-Transfer Reagent − Synthesis and Solid-State Structure of Bis(2,2′-biimidazole)bis(triphenylphosphane oxide)osmium(III) Nitrate" @default.
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- W1976523276 doi "https://doi.org/10.1002/1099-0682(200109)2001:9<2263::aid-ejic2263>3.0.co;2-z" @default.
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