Palladium(II) fluoride, also known as palladium difluoride, is the
chemical compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element ...
of
palladium and
fluorine
Fluorine is a chemical element; it has Chemical symbol, symbol F and atomic number 9. It is the lightest halogen and exists at Standard temperature and pressure, standard conditions as pale yellow Diatomic molecule, diatomic gas. Fluorine is extre ...
with the
formula
In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a ''chemical formula''. The informal use of the term ''formula'' in science refers to the general construct of a relationship betwe ...
PdF
2.
Synthesis
PdF
2 is prepared by
refluxing
palladium(II,IV) fluoride, Pd
II dIVF6 with
selenium tetrafluoride, SeF
4.
:Pd
dF6+ SeF
4 → 2PdF
2 + SeF
6
Structure and paramagnetism
Like its lighter
congener nickel(II) fluoride, PdF
2 adopts a
rutile
Rutile is an oxide mineral composed of titanium dioxide (TiO2), the most common natural form of TiO2. Rarer polymorphs of TiO2 are known, including anatase, akaogiite, and brookite.
Rutile has one of the highest refractive indices at vis ...
-type
crystal structure
In crystallography, crystal structure is a description of ordered arrangement of atoms, ions, or molecules in a crystalline material. Ordered structures occur from intrinsic nature of constituent particles to form symmetric patterns that repeat ...
, containing
octahedrally coordinated palladium, which has the
electronic configuration t e. This configuration causes PdF
2 to be
paramagnetic due to two unpaired electrons, one in each e
g-symmetry
orbital of palladium.
Applications
Palladium fluoride is an
insoluble powder used in
infrared
Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the waves that are just longer than those ...
optical
sensors,
and in situations where reactivity to oxygen makes
palladium oxide unsuitable.
See also
*
Palladium fluoride
References
{{fluorides
Palladium compounds
Fluorides
Platinum group halides