Reinecke's salt
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Template:Chembox image cellTemplate:Chembox image cellTemplate:Chembox AllOtherNamesTemplate:Chembox headerbarTemplate:Chembox IndexlistTemplate:Chembox JmolTemplate:Chembox ChEMBLTemplate:Chembox ECHATemplate:Chembox E numberTemplate:Chembox IUPHAR ligandTemplate:Chembox UNIITemplate:Chembox CompToxTemplate:Chembox headerbarTemplate:Chembox SolubilityInWaterTemplate:Chembox headerbarTemplate:Chembox HazardsTemplate:Chembox headerbarTemplate:Chembox Datapage checkTemplate:Yesno| Template:Longitem | Template:Unbulleted list |
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| Template:Longitem | Template:Chem2 |
| Molar mass | 354.42 g/mol |
| Appearance | dark red solid |
| Density | 1.49 g/cm3[1] |
| Melting point | Template:Chembox CalcTemperatures |
| Boiling point | Template:Chembox CalcTemperatures |
| Template:Longitem | octahedral |
| Template:Longitem | 0 D |
| Template:Longitem | [Co(NH3)6]Cl3, KSCN, Chromium(III) chloride |
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Reinecke's salt is an inorganic compound with the formula Template:Chem2. The dark-red crystalline compound is soluble in boiling water, acetone, and ethanol.[2] It can be classified as a metal isothiocyanate complex.
Structure, preparation, reactions
The chromium atom is surrounded by six nitrogen atoms in an octahedral geometry. The Template:Chem2 ligands are mutually trans and the Template:Chem2 groups are linear. The salt crystallizes with one molecule of water.[1]
It was first reported in 1863.[3] Template:Chem2 is prepared by treatment of molten Template:Chem2 (melting point around Script error: No such module "convert".) with Template:Chem2.[4]
This salt was once widely used to precipitate primary and secondary amines as their ammonium salts. Included in the amines that effectively form crystalline precipitates are those derived from the amino acids, including proline and hydroxyproline. It also reacts with Template:Chem2 compounds, giving a red color or a red precipitate.
References
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