Rubidium Tetraiodothallate(III) Dihydrate Rb[TlI4]·2H2O
First published at 04:39 UTC on November 18th, 2020.
In this video I prepare a complex of thallium(III) iodide and rubidium iodide using thallium(I) iodide and elemental iodine. The reaction must be carried out in methanol; ethanol and other common organic solvents as well as water will decompose the TlI3 intermediate as well the final Rb[TlI4] product. Heat also disagrees with it, breaking it down to the starting compounds.
"... it is possible to stabilise thallium(III) with excess I− forming the TlI4− ion (isoelectronic with the tetraiodomercurate anion and with lead(IV) iodide)."
-- infogalactic.com/info/Thallium…
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Nanook
in reply to J R • •J R
in reply to Nanook • • •A few of them have some limited uses in organic chemistry.
This would be a moderately-strong oxidizing agent, and a source of iodine. But offhand, I don't know of any application where it would be preferable to plain iodine, or potassium triiodide.
Nanook
in reply to J R • •J R
in reply to Nanook • • •Yeah, I saw that one. AKA isocyanogen tetraazide. How can it even exist?
It was surprisingly stable. You can see the little specks of it melt, just before they blow a hole in whatever they're sitting on.
Jolly Rancher
in reply to J R • • •J R
in reply to Jolly Rancher • • •