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A single-displacement reaction, also known as single replacement reaction or exchange reaction, is an archaic concept in chemistry. It describes the stoichiometry of some chemical reactions in which one element or ligand is replaced by an atom or group.
In chemistry, halogenation is a chemical reaction which introduces one or more halogens into a chemical compound. Halide-containing compounds are pervasive, making this type of transformation important, e.g. in the production of polymers, drugs. [1]
For polyhalogen anions with the same number of atoms, the more stable ones are those with a heavier halogen at the center, symmetric ions are also more stable than asymmetric ones. therefore the stability of the anions decrease in the order: [I 3] − > [IBr 2] − > [ICl 2] − > [I 2 Br] − > [Br 3] − > [BrCl 2] − > [Br 2 Cl] −
The halogens can all react with metals to form metal halides according to the following equation: 2M + nX 2 → 2MX n. where M is the metal, X is the halogen, and MX n is the metal halide. Sample of silver chloride. In practice, this type of reaction may be very exothermic, hence impractical as a preparative technique.
An experiment conducted by Meshram et al. in 2005 investigated making ketone halogenation a greener reaction, according to the principles of green chemistry. [ 5 ] [ 6 ] Meshram et al. investigated alternatives to the hazardous chemicals that are primarily used in ketone halogenation, finding that room temperature ionic liquids were a promising ...
The videos feature various experiments and demonstrations of the elements, some too dangerous to be performed in a classroom. [ 5 ] [ 8 ] Though the presenters take appropriate precautions when doing such experiments and provide adequate warnings, some scientists have criticized the dangerous experiments fearing people might try them at home ...
The experiments were performed between 1906 and 1913 by Hans Geiger and Ernest Marsden under the direction of Ernest Rutherford at the Physical Laboratories of the University of Manchester. The physical phenomenon was explained by Rutherford in a classic 1911 paper [ 1 ] that eventually led to the widespread use of scattering in particle ...
The sodium fusion test, or Lassaigne's test, is used in elemental analysis for the qualitative determination of the presence of foreign elements, namely halogens, nitrogen, and sulfur, in an organic compound. It was developed by J. L. Lassaigne. [1] The test involves heating the sample with sodium metal, "fusing" it with the sample. A variety ...