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Hydrogen telluride is the inorganic compound with the formula H 2 Te.A hydrogen chalcogenide and the simplest hydride of tellurium, it is a colorless gas.Although unstable in ambient air, the gas can exist long enough to be readily detected by the odour of rotting garlic at extremely low concentrations; or by the revolting odour of rotting leeks at somewhat higher concentrations.
The telluride ion is the anion Te 2− and its derivatives. It is analogous to the other chalcogenide anions, the lighter O 2−, S 2−, and Se 2−, and the heavier Po 2−. [1] In principle, Te 2− is formed by the two-e − reduction of tellurium. The redox potential is −1.14 V. [2] Te(s) + 2 e − ↔ Te 2−
TeO 2 + H 2 O 2 + 2 H 2 O → Te(OH) 6. Crystallization of telluric acid solutions below 10 °C gives telluric acid tetrahydrate Te(OH) 6 ·4H 2 O. [3] It is an oxidising agent, as shown by the electrode potential for the reaction below, although it is kinetically slow in its oxidations. [4] Te(OH) 6 + 2 H + + 2 e − ⇌ TeO 2 + 4 H 2 O, E o ...
Na 2 Te, like many related compounds with the formula M 2 X, adopts the antifluorite structure. Thus, in solid Na 2 Te each Te 2− ion is surrounded by eight Na + ions and each Na + ion is surrounded by four Te 2− ions. [3] Simple salts of the type M 2 X, where X is a monatomic anion, are not typically soluble in any solvent because they ...
In contrast to the analogous compound selenous acid, tellurous acid is only metastable. Most tellurite salts contain the TeO 2− 3 ion. Oxidation of its aqueous solution with hydrogen peroxide gives the tellurate ion. It is usually prepared as an aqueous solution where it acts as a weak acid. [1] [3] H 2 TeO 3 + H 2 O ⇌ H 3 O + + HTeO − 3 ...
2. [10] Tellurium also exhibits mixed-valence oxides, Te 2 O 5 and Te 4 O 9. [10] The tellurium oxides and hydrated oxides form a series of acids, including tellurous acid (H 2 TeO 3), orthotelluric acid (Te(OH) 6) and metatelluric acid ((H 2 TeO 4) n). [9] The two forms of telluric acid form tellurate salts containing the TeO 2– 4 and TeO 6 ...
3 O 2− 10 and pentasulfate S 5 O 2− 16 ions all contain 4-coordinate sulfur and are built from corner-shared {SO 4} tetrahedra. [14] Selenate compounds include many examples of four coordinate selenium, principally the tetrahedral SeO 2− 4 ion and the pyroselenate ion, Se 2 O 2− 7 which has a similar structure to the pyrosulfate ion. [15]
Compounds that contain the anions follow basic nomenclature rules, the cation is named first, followed by the anion. [2] As individual ions current IUPAC naming conventions dictate that compounds containing what was conventionally known as the tellurite ion, [TeO 3 ] 2- , be named as tellurate (IV) compounds, while other tellurates are labeled ...