Ruthenium(III) iodide is a chemical compound containing ruthenium and iodine with the formula . It is a black solid.
Structure Ruthenium(III) iodide adopts an extended structure with octahedral coordination geometry at ruthenium. There is some doubt about the characterisation of ruthenium(III) iodide and it may be an oxohalide or a hydroxyhalide.
Preparation Ruthenium(III) iodide can be prepared in several ways.
The reaction of ruthenium tetroxide with aqueous hydroiodic acid:
The thermal decomposition of pentaammineruthenium(III) iodide:
The salt metathesis reaction of hydrated ruthenium(III) chloride with potassium iodide in aqueous solution:
Direct combination of the elements has been reported to succeed under some conditions (350 °C) but not others (500 °C and 20 atm):
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