Halide

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A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound. Many salts are halides. All Group 1 metals form halides with the halogens and they are white solids.

A halide ion is a halogen atom bearing a negative charge. The halide anions are fluoride (F⁻), chloride (Cl⁻), bromide (Br⁻), iodide (I⁻) and astatide (At⁻). Such ions are present in all ionic halide salts.

1 Halides in organic chemistry
2 Test for Halide ions
3 Halides in lighting
4 Halide compounds
5 See also
6 References

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Halides in organic chemistry

In organic chemistry halides represent a functional group. Any organic compound that contains a halogen atom can be considered a halide. Alkyl halides are organic compounds of the type R-X, containing an alkyl group R covalently bonded to a halogen X.

Pseudohalides resemble halides in their charge and reactivity; common examples are azides NNN-, isocyanate -NCO, Isocyanide, CN-, etc.<ref>Template:GoldBookRef</ref> (See also: pseudohalogen.)

A chemical test for the detection of halogen in chemical substances is the Carius halogen method.

Dihalides are commonly used in the synthesis of cyclic alkanes.

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Test for Halide ions

Halide compounds such as KCl, KBr and KI can be tested with silver nitrate solution, AgNO₃. The halogen will react with Ag⁺ and form a precipitate, with colour as follow:
AgF - Yellowish Brown
AgCl - White
AgBr - Creamy (Pale Yellow)
AgI - Yellow

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