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Organic Chemistry Tutorials

Types of Rearrangement reactions in chemistry

An atom or group of atoms migrate from one position to another; such reactions are rearrangement reactions.

Post rearrangement, the molecule formed has the atoms arranged differently but has the same molecular formula as the parent. Therefore, such rearrangements create structural isomers, compounds that differ in structure but have the same molecular formula.

Related Reading - Structural Isomerism

Theories on Covalent Bond Formation

Dalton, in 1804, in his work on ‘Atomic Theory,’ proposed the law of chemical combination to explain how atoms form compounds. According to him, atoms of different elements combine in a simple whole-number ratio to give compounds.

For example, two Hydrogen and one Oxygen combine to form water (H2O), or four Hydrogens and one Carbon combine to form methane (CH4), or one Nitrogen combines with three Hydrogens to give ammonia (NH3).