Hydrogen telluride

Hydrogen telluride

Chembox new
Name = Hydrogen telluride
ImageFileL1 = Hydrogen-telluride-2D-dimensions.png ImageSizeL1 = 130px
ImageNameL1 = Structural diagram of the hydrogen telluride molecule
ImageFileR1 = Hydrogen-telluride-3D-vdW.png ImageNameR1 = Space-filling model of the hydrogen telluride molecule
IUPACName = hydrogen telluride
OtherNames = hydrotelluric acid
tellurium hydride
Section1 = Chembox Identifiers
CASNo = 7783-09-7

Section2 = Chembox Properties
Formula = H2Te
MolarMass = 129.6158 g mol−1
Appearance = colourless gas
Density = 3.310 g/l, gas.
Solubility = 0.70 g/100 mL
MeltingPt = −51 °C
BoilingPt = −4 °C (unstable above 0 °C)
pKa =

Section3 = Chembox Structure
MolShape = bent
Dipole =

Section7 = Chembox Hazards
ExternalMSDS =
MainHazards = toxic
FlashPt =
RPhrases =
SPhrases =

Section8 = Chembox Related
OtherAnions = H2O
OtherCations = Na2Te

Hydrogen telluride is the chemical compound with the formula H2Te. It is the simplest hydride of tellurium.

Physical description

Most compounds with Te-H bonds are unstable with respect to loss of H2, and H2Te follows this pattern. H2Te is chemically similar to hydrogen selenide, both are reactive, acidic species with H-X-H angles approaching 90°.


H2Te is prepared by the acidification of salts of Te2−, such as Al2Te3 and Na2Te. Na2Te can be generated by the reaction of Na and Te in anhydrous ammonia.

Popular culture

The strong, unpleasant odour of H2Te was remarked upon in a scene in the "Doctor Who" serial "The Krotons" (1968/9), when it was described as "the worst smell in the world". Odour resembles rotting garlic but is even more revolting.

ee also



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