Difluoride

Difluoride

Difluoride

Index of chemical compounds with the same name

Not to be confused with Bifluoride.

Difluorides are chemical compounds with two fluorine atoms per molecule (or per formula unit).

Order and disorder in difluorides
The fluorite structure Beryllium fluoride glass

Metal difluorides are all ionic. Despite being highly ionic, the alkaline earth metal difluorides generally have extremely high lattice stability and are thus insoluble in water. The exception is beryllium difluoride. In addition, many transition metal difluorides are water-soluble.

Calcium difluoride is a notable compound. In the form of the mineral fluorite it is the major source of commercial fluorine. It also has an eponymic crystal structure, which is an end member of the spectrum starting from bixbyite and progressing through pyrochlore.

List of the difluorides

Examples of the difluorides include:

Alkaline earth metal difluorides

The alkaline earth metals all exhibit the oxidation state +2, and form difluorides. The difluoride of radium is however not well established due to the element's high radioactivity.

More information Metal, M2+ HE ...

Lanthanide difluorides

Transition metal difluorides

Compounds of the form MF2:

Post-transition metal difluorides

Nonmetal and metalloid difluorides

Noble gas difluorides

Bifluorides

The bifluorides contain the two fluorine atoms in a covalently bound HF2− polyatomic ion rather than as F− anions.

Organic difluorides

References

  1. [1]
    Wiberg, Wiberg & Holleman 2001, pp. XXXVI–XXXVII.
  2. [2]
    Wiberg, Wiberg & Holleman 2001, p. XXXVI.
  3. [3]
    Lide 2004, p. 12-23.
  4. [4]
    Wiberg, Wiberg & Holleman 2001, p. 1073.
  5. [5]
    "Samarium(II) fluoride". Pubchem.ncbi.nlm.nih.gov. Retrieved 22 February 2022.
  6. [6]
    Elements, American. "Europium(II) Fluoride". Americanelements.com. Retrieved 22 February 2022.
  7. [7]
    "EUROPIUM(II) FLUORIDE | 14077-39-5". Chemicalbook.com. Retrieved 22 February 2022.
  8. [8]
    Georg Brauer: Handbuch der Präparativen Anorganischen Chemie. 3., umgearb. Auflage. Band I. Enke, Stuttgart 1975, ISBN 3-432-02328-6, p. 255.

Bibliography

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