Hydrogen telluride

  • hydrogen telluride
    structural diagram of the hydrogen telluride molecule
    space-filling model of the hydrogen telluride molecule
    names
    iupac name
    hydrogen telluride
    other names
    hydrotelluric acid
    tellane
    tellurium hydride
    identifiers
    cas number
    • 7783-09-7 ☑y
    3d model (jsmol)
    • interactive image
    chebi
    • chebi:30452 ☒n
    chemspider
    • 20455 ☒n
    echa infocard 100.029.073
    ec number
    • 236-813-4
    pubchem cid
    • 21765
    unii
    • 7f4735942k ☒n
    comptox dashboard (epa)
    • dtxsid20228446 edit this at wikidata
    properties
    chemical formula
    h2te
    molar mass 129.6158 g mol−1
    appearance colourless gas
    density 3.310 g/l, gas
    2.57 g/cm3 (−20 °c, liquid)
    melting point −49 °c (−56 °f; 224 k)[1]
    boiling point −2.2 °c (28.0 °f; 270.9 k) (unstable above −2 °c)
    solubility in water
    0.70 g/100 ml
    acidity (pka) 2.6
    conjugate acid telluronium
    conjugate base telluride
    structure
    molecular shape
    bent
    thermochemistry
    std enthalpy of
    formation
    fh298)
    0.7684 kj/g
    hazards
    main hazards toxic
    nfpa 704 (fire diamond)
    nfpa 704 four-colored diamond
    4
    4
    1
    related compounds
    other anions
    h2o
    h2s
    h2se
    h2po
    other cations
    na2te
    ag2te
    te
    rb2te
    te
    related compounds
    telluric acid
    tellurous acid
    except where otherwise noted, data are given for materials in their standard state (at 25 °c [77 °f], 100 kpa).
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    infobox references

    hydrogen telluride (tellane) is the inorganic compound with the formula h2te. a hydrogen chalcogenide and the simplest hydride of tellurium, it is a colorless gas. although unstable in ambient air, the gas can exist at very low concentrations 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. most compounds with te–h bonds (tellurols) are unstable with respect to loss of h2. h2te is chemically and structurally similar to hydrogen selenide, both are acidic. the h–te–h angle is about 90°. volatile tellurium compounds often have unpleasant odours, reminiscent of decayed leeks or garlic.[2]

  • synthesis
  • properties
  • see also
  • references

Hydrogen telluride
Structural diagram of the hydrogen telluride molecule
Space-filling model of the hydrogen telluride molecule
Names
IUPAC name
hydrogen telluride
Other names
hydrotelluric acid
tellane
tellurium hydride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.073
EC Number
  • 236-813-4
UNII
Properties
H2Te
Molar mass 129.6158 g mol−1
Appearance colourless gas
Density 3.310 g/L, gas
2.57 g/cm3 (−20 °C, liquid)
Melting point −49 °C (−56 °F; 224 K)[1]
Boiling point −2.2 °C (28.0 °F; 270.9 K) (unstable above −2 °C)
0.70 g/100 mL
Acidity (pKa) 2.6
Conjugate acid Telluronium
Conjugate base Telluride
Structure
bent
Thermochemistry
0.7684 kJ/g
Hazards
Main hazards toxic
NFPA 704 (fire diamond)
Flammability code 4: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily. Flash point below 23 °C (73 °F). E.g. propaneHealth code 4: Very short exposure could cause death or major residual injury. E.g. VX gasReactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no codeNFPA 704 four-colored diamond
4
4
1
Related compounds
Other anions
H2O
H2S
H2Se
H2Po
Other cations
Na2Te
Ag2Te
Te
Rb2Te
Te
Related compounds
telluric acid
tellurous acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is ☑Y☒N ?)
Infobox references

Hydrogen telluride (tellane) is the inorganic compound with the formula H2Te. A hydrogen chalcogenide and the simplest hydride of tellurium, it is a colorless gas. Although unstable in ambient air, the gas can exist at very low concentrations 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. Most compounds with Te–H bonds (tellurols) are unstable with respect to loss of H2. H2Te is chemically and structurally similar to hydrogen selenide, both are acidic. The H–Te–H angle is about 90°. Volatile tellurium compounds often have unpleasant odours, reminiscent of decayed leeks or garlic.[2]