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1,1-Difluoroethylene

1.122 g/mL (liquid, −84 °C)

1,1-Difluoroethylene, also known as vinylidene fluoride, is a hydrofluoroolefin. This colorless, flammable gas is a difluorinated derivative of ethylene. Global production in 1999 was approximately 33,000 metric tons. It is primarily used in the production of fluoropolymers such as polyvinylidene fluoride and FKM.

Preparation

1,1-Difluoroethylene can be prepared by elimination reaction from a 1,1,1-trihaloethane compound, for example, loss of hydrogen chloride from 1-chloro-1,1-difluoroethane:

:[[File:Preparation of 1,1-difluoroethylene from 1-chloro-1,1-difluoroethane.png|250px|Preparation of 1,1-difluoroethylene from 1-chloro-1,1-difluoroethane]]

or loss of hydrogen fluoride from 1,1,1-trifluoroethane:

:[[File:Preparation of 1,1-difluoroethylene from 1,1,1-trifluoroethane.png|250px|Preparation of 1,1-difluoroethylene from 1,1,1-trifluoroethane]]

References

References

  1. "Difluoro-1,1-ethylene". [[Air Liquide]].
  2. {{GESTIS
  3. "1,1'-Difluoroethylene (VDF, VF2)". [[International Programme on Chemical Safety]].
  4. {{PGCH. 0662
  5. (1994). "Kirk-Othmer Encyclopedia of Chemical Technology". John Wiley and Sons.
  6. (2000). "Ullmann's Encyclopedia of Industrial Chemistry".
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fluoroalkenes vinylidene-compounds hydrofluoroolefins
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