In chemistry, the process or result of substituting two atoms or groups in a molecule with different atoms or groups.
From di- (two) + substitution (from Latin substituere). The -tion suffix converts the verb concept into a noun representing the action or process.
The beauty of scientific nomenclature is that 'disubstitution' tells you there are two substitutions without needing to specify which atoms—then you add specific details separately, keeping each word focused.
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