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The following exergonic equilibrium gives rise to the triiodide ion: . I 2 + I − ⇌ I − 3. In this reaction, iodide is viewed as a Lewis base, and the iodine is a Lewis acid.The process is analogous to the reaction of S 8 with sodium sulfide (which forms polysulfides) except that the higher polyiodides have branched structures.
Triodide may refer to: (usually lower case) a common misspelling for triiodide , the I 3 − ion in chemistry (usually capitalized) Orion Safety and Pacific Dynamics trademarked brand name for Trifluoroiodomethane
Thorium triiodide is a binary inorganic compound of thorium metal and iodine with the chemical formula ThI 3. [1] [2] [3] Synthesis.
Nitrogen triiodide is an inorganic compound with the formula N I 3. It is an extremely sensitive contact explosive : small quantities explode with a loud, sharp snap when touched even lightly, releasing a purple cloud of iodine vapor; it can even be detonated by alpha radiation .
Antimony triiodide is the chemical compound with the formula Sb I 3. This ruby-red solid is the only characterized "binary" iodide of antimony , i.e. the sole compound isolated with the formula Sb x I y .
The name "aluminium iodide" is widely assumed to describe the triiodide or its dimer. In fact, a monoiodide also enjoys a role in the Al–I system, although the compound AlI is unstable at room temperature relative to the triiodide: [7] 3 AlI → AlI 3 + 2 Al
Thallium triiodide is a chemical compound of thallium and iodine with formula TlI 3. Unlike the other thallium trihalides, which contain thallium(III), TlI 3 is a thallium(I) salt and contains the triiodide ion, I − 3. An appreciation as to why Tl + is not oxidised to Tl 3+ in the reaction: Tl 3+ + 2 I − → Tl + + I 2
Hydrolysis occurs only slowly in water forming arsenic trioxide and hydroiodic acid.The reaction proceeds via formation of arsenous acid which exists in equilibrium with hydroiodic acid.