Adams' catalyst
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Adams' catalyst, also known as platinum dioxide, is usually represented as platinum(IV) oxide hydrate, PtO2•H2O. It is a catalyst for hydrogenation and hydrogenolysis in organic synthesis.[1] This dark brown powder is commercially available. The oxide itself is not an active catalyst, but it becomes active after exposure to hydrogen whereupon it converts to platinum black, which is responsible for reactions.
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Platinum(IV) oxide | |
Other names
platinum dioxide, platinic oxide | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.013.840 |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
PtO2 | |
Molar mass | 227.08 g/mol |
Appearance | black solid |
Density | 10.2 g/cm3 |
Melting point | 450 °C (842 °F; 723 K) |
insoluble | |
Solubility | insoluble in alcohol, acid, aqua regia soluble in caustic potash solution |
−37.70·10−6 cm3/mol | |
Hazards | |
GHS labelling: | |
Danger | |
H271 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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