Halide

From Wikipedia, the free encyclopedia

You have new messages (last change).

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.

Metal halides are used in high-intensity discharge lamps called metal halide lamps, such as those used in modern street lights. These are more energy-efficient than mercury-vapor lamps, and have much better colour rendition than orange high-pressure sodium lamps. Metal halide lamps are also commonly used in greenhouses or in rainy climates to supplement natural sunlight.

A halide ion is a halogen atom bearing a negative ion, such as fluoride ion (F-) or chloride ion (Cl-). Such ions are present in all ionic halide salts.

[edit] 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.

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

[edit] Examples

Examples of halides are:

[edit] See also

Retrieved from "http://en.wikipedia.org../../../h/a/l/Halide.html"