Tetrapropylammonium perruthenate

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What Wikipedia says

Tetrapropylammonium perruthenate (TPAP or TPAPR) is the chemical compound described by the formula N(C3H7)4RuO4. Sometimes known as the Ley–Griffith reagent, this ruthenium compound is used as a reagent in organic synthesis. This salt consists of the tetrapropylammonium cation and the perruthenate anion, RuO−4.

Excerpt from the Wikipedia article “Tetrapropylammonium perruthenate”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Leiem, CC BY-SA 4.0, via Wikimedia Commons.