Search results
Results from the WOW.Com Content Network
radii of common halogen atoms (gray/black) and the corresponding halide anions (blue) In chemistry, a halide (rarely halogenide [1]) is a binary chemical compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative (or more electropositive) than the halogen, to make a fluoride, chloride, bromide, iodide, astatide, or theoretically ...
Halide minerals are those minerals with a dominant halide anion (F −, Cl −, Br − and I −). Complex halide minerals may also have polyatomic anions. [1] Halite Fluorite structure. Examples include the following: [2] [3] Atacamite Cu 2 Cl(OH) 3; Avogadrite (K,Cs)BF; Bararite (β) (NH 4) 2 SiF 6 [4] Bischofite MgCl 2 ·6H 2 O; Brüggenite ...
The silver and thallium(I) cations have a great affinity for halide anions in solution, and the metal halide quantitatively precipitates from aqueous solution. This reaction is so reliable that silver nitrate is used to test for the presence and quantity of halide anions. The reaction of silver cations with bromide anions:
With halide ions there are examples of all of these geometries along with some anions with octahedrally coordinated indium and with bridging halogen atoms, In 2 X 3− 9 with three bridging halogen atoms and In 2 X − 7 with just one. Additionally there are examples of indium with square planar geometry in the InX 5 2− ion.
In all known structures of the polyhalogen anion salts, the anions make very close contact, via halogen bridges, with the counter-cations. [4] For example, in the solid state, [IF 6 ] − is not regularly octahedral, as solid state structure of [(CH 3 ) 4 N] + [IF 6 ] − reveals loosely bound [I 2 F 11 ] 2− dimers.
Both anions contain a gallium-gallium bond where gallium has a formal oxidation state of +2. The Ga 2 Br 6 2− anion is eclipsed like the In 2 Br 6 2− anion in In 2 Br 3 whereas the Ga 2 I 6 2− anion is isostructural with Si 2 Cl 6 with a staggered conformation.
Oxohalide anions such as [VOCl 4] 2− can be seen as acid-base complexes of the oxohalide (VOCl 2) with more halide ions acting as Lewis bases. Another example is VOCl 2 which forms the trigonal bipyramidal complex VOCl 2 (N(CH 3) 3) 2 with the base trimethylamine. [4]
The Halide Class includes minerals with a halogen as the major anion: fluorine F ...