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
tellane
tellurium hydride
Section1 = Chembox Identifiers
CASNo = 7783-09-7
RTECS =
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
H₂S
H₂Se
H₂Po
OtherCations = Na₂Te
Ag₂Te

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°.

ynthesis

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

*Dimethyltelluride

References