A hydrotelluride or tellanide is an ion or a chemical compound containing the [HTe]− anion which has a hydrogen atom connected to a tellurium atom. HTe is a pseudohalogen. Organic compounds containing the -TeH group are called tellurols. "Tellanide" is the proper name according to the International Union of Pure and Applied Chemistry's Red Book, but hydrogen(tellanide)(1−) is also listed. "Tellanido" as a ligand is not named in the Red Book itself, but "tellanido" and "hydrogentellurido" are listed in the contemporaneous Principles of Chemical Nomenclature:A Guide to IUPAC Recommendations. For the group -HTe or radical HTe• the term tellanyl is used.
Hydrotellurides are usually unstable at room temperature.
List formulasystemspace groupunit cell Åvolumedensitycommentreferenceammonium hydrotelluride Decomposes at room temperature over a fortnight; 116c. NH4TeHat 25 °C pressure = 22.7 mmHg, decomposing to H3N and H2Te then to Te and H2ethylmethylimidazolinium hydrotelluride[(C2H5)(CH3)C3N2H2]+TeH−N-butyl-N-methylpyrollidinium hydrotelluride[(C4H9)(CH3)C4NH8]+TeH−decompose at room temperature over a fortnight; decompose 116 °Csodium hydrotellurideNaTeHtri-n-butyl-methylphosphonium hydrotelluride[(C4H9)3(CH3)P]+TeH−red; decompose 163 °Ctetraphenylphosphonium hydrotelluridePh4PTeH[(C5H5)Co]2(μ-P(CH3)2)2(μ-TeH)•PF6red-brownNa[(CO)5Cr(TeH)][(Ph3P)2N]+[(CO)5Cr(TeH)]−[(Ph3P)2N]+[(CO)5Cr(TeH)Cr(CO)5]−[CpCr(CO)3]2(μ-TeH)[(CO)4Mn(TeH)]2Cp*=C5Me5Cp*2Zr(TeH){η1-OC(Ph)=CH2}(t-BuC5H4)2Nb(η2-Te2)Hdark orange(η-C5H4Me)Ru(PPh3)2(TeH)(CH2CH2PPh2)3PRhTeHhexagonalP63a=13.542 c=12.346 Z=2cherry red; decomposed by light(CH2CH2PPh2)3PRh(TeH)(H)CF3SO3(MeCp)2Ta(TeH)CO(MeCp)2Ta(TeH) (η2-COTe)Na[(CO)5W(TeH)]Ph4As[(CO)5W(TeH)]Ph4As[(CO)5W(TeH)W(CO)5]Cp*Re(CO)2(H)(TeH)monoclinicP21/ma=7.467 b=13.208 c=7.570 β=99.48° Z=22.287red-brown(AdArO)3N3− = tris(2-hydroxy-3-adamantyl-5-methylbenzyl)amine)[((AdArO)3N)U(CH3OC2H4OCH3)(TeH)]stable to 80 °C; U–Te bond length 3.122 Å{((AdArO)3N)U}2(μ-TeH)2
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