A rearrangement reaction is a broad class of organic reactions where the carbon skeleton of a molecule is rearranged to give a structural isomer of the original molecule. Often a substituent moves from one atom to another atom in the same molecule. In the example below the substituent R moves from carbon atom C1 to C2. Organic reactions are chemical reactions between organic compounds. ... A molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. ... In chemistry, isomers are molecules with the same chemical formula and often with the same kinds of bonds between atoms, but in which the atoms are arranged differently. ... In organic chemistry, a substituent is an atom or group of atoms subsituted in place of a hydrogen atom on the parent chain of a hydrocarbon. ...
A 1,2-rearrangement or 1,2-shift or Whitmore 1,2-shift is a organic reaction where a substituent moves from one atom to another atom in a chemical compound. ... An electrocyclic reaction is a type of pericyclic rearrangement reaction where the net result is one pi bond being converted into one sigma bond. ... A Sigmatropic reaction is a pericyclic reaction where the net result is one sigma bond being changed to another sigma bond. ... Olefin metathesis or transalkylidenation (in some literature a disproportionation) is a organic reaction which involves redistribution of olefinic bonds. ...
A chemical reaction or is a reaction of two or more chemicals (reagents), yielding a chemical change and a product(s).
In a rearrangementreaction, the atoms and bonds within a moleculerearrange to form an isomer of the original compound.
In an oxidation-reduction reaction (also known as a redox reaction), one reactant loses electrons (that is, it is oxidized), and the other reactant gains electrons (it is reduced).
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