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  2. Osmium tetroxide - Wikipedia

    en.wikipedia.org/wiki/Osmium_tetroxide

    OsO 4 is a widely used staining agent used in transmission electron microscopy (TEM) to provide contrast to the image. [22] This staining method may also be known in the literature as the OTO [23] [24] (osmium-thiocarbohydrazide-osmium) method, or osmium impregnation [25] technique or simply as osmium staining.

  3. Osmium compounds - Wikipedia

    en.wikipedia.org/wiki/Osmium_compounds

    Osmium tetroxide is the most notable compound of osmium, having many uses. The name "osmium" even derives from Greek " ὀσμή, osme, 'smell'" because of the smell of osmium tetroxide. [12] It also has a number of unusual properties, one being that the solid is volatile. Its volatility, along with its strong oxidizing power, is the origin of ...

  4. Osmium - Wikipedia

    en.wikipedia.org/wiki/Osmium

    4] are used in the synthesis of osmium cluster compounds. [29] [30] Osmium tetroxide (OsO 4) The most common compound exhibiting the +8 oxidation state is osmium tetroxide (OsO 4). This toxic compound is formed when powdered osmium is exposed to air. It is a very volatile, water-soluble, pale yellow, crystalline solid with a strong smell.

  5. Ruthenium compounds - Wikipedia

    en.wikipedia.org/wiki/Ruthenium_compounds

    Ruthenium can be oxidized to ruthenium(IV) oxide (RuO 2, oxidation state +4), which can, in turn, be oxidized by sodium metaperiodate to the volatile yellow tetrahedral ruthenium tetroxide, RuO 4, an aggressive, strong oxidizing agent with structure and properties analogous to osmium tetroxide. RuO 4 is mostly used as an intermediate in the ...

  6. Staining - Wikipedia

    en.wikipedia.org/wiki/Staining

    Osmium tetroxide is used in optical microscopy to stain lipids. It dissolves in fats, and is reduced by organic materials to elemental osmium, an easily visible black substance. Because it is a heavy metal that absorbs electrons, it is perhaps the most common stain used for morphology in biological electron microscopy.

  7. Osmium oxide - Wikipedia

    en.wikipedia.org/wiki/Osmium_oxide

    Osmium oxide may refer to: Osmium dioxide, OsO 2; Osmium tetroxide, OsO 4 This page was last edited on 4 March 2021 ...

  8. Dihydroxylation - Wikipedia

    en.wikipedia.org/wiki/Dihydroxylation

    Mechanism for dihydroxylation using osmium tetroxide. In the dihydroxylation mechanism, a ligand first coordinates to the metal catalyst (depicted as osmium), which dictates the chiral selectivity of the olefin. The alkene then coordinates to the metal through a (3+2) cycloaddition, and the ligand dissociates from the metal catalyst.

  9. Ruthenium tetroxide - Wikipedia

    en.wikipedia.org/wiki/Ruthenium_tetroxide

    Ruthenium tetroxide is the inorganic compound with the formula RuO 4. It is a yellow volatile solid that melts near room temperature. [3] It has the odor of ozone. [4] Samples are typically black due to impurities. The analogous OsO 4 is more widely used and better known.

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