Perosmate

By contrast, dissolution of OSO4 in cold aqueous KOH produces deep-red crystals of K2[0s 04(0H)2] ( perosmate ), which is easily reduced to the purple osmate , K2[0s 02-(0H)4]. The anions in both cases are octahedral with, respectively, trans OH and trans O groups. 

Osmic acid, osmic acid anhydride, perosmic oxide. 

Pd(0). The real challenge was the reoxidation of osmium to make the process catalytic. When the osmate ester is hydrolyzed at the organic aqueous interface, an osmate(VI) dianion (as a potassium salt) is released in the aqueous phase. Oxidation of osmate(VI) by potassium ferricyanide regenerates osmium tetr-oxide via an intermediate perosmate(VIII) anion. Loss of two hydroxide groups from the perosmate(VIII) ion gives osmium tetroxide, which then migrates back to the organic phase to restart the cycle. 

OsOsN]" (p. 419). Pale-yellow crystals of KjOsOsN] are obtained when solutions of OSO4 in aqueous KOH (i.e. the perosmate) are treated with ammonia the compound has been known since 1847 and A. Werner formulated it correctly in 1901. The anion is isoelectronic with OSO4 and has a distorted tetrahedral structure (C3 ), while its infrared spectrum shows vos-N = 1023cm , consistent with an Os=N triple bond. Hydrochloric and hydrobromic acids reduce K[0s03N] to red, K2[Os NXs]. 

SYNONYMS osmic acid, osmium (VIII) oxide, perosmic acid anhydride, perosmic ox-... 

Synonyms Osmic acid Osmium (VIII) oxide Perosmic acid anhydride Perosmic oxide... 

Perone 30 EG] Perone 35] Perone 50 EG] Perone 50. See Hydrogen peroxide Peropal . See Azocyclotin Perosmic acid anhydride Perosmic oxide. See Osmium tetroxide Perovskite. See Calcium titanate PeroxClean Hydrogen Peroxide 35%] PeroxClean Hydrogen Peroxide 50%] Perox-Gard . See Hydrogen peroxide Peroxidase... 

Osmic acid, perosmic oxide, osmium(IV) oxide)... 

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