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Subject - General Chemistry

In substitution (from the Latin substituere) reactions

  • one atom or a group of atoms in the molecule is replaced by other atoms or group of atoms (substituents),
  • ligands at the central atom of coordination compounds are exchanged and
  • atomic nuclei are replaced by other nuclei with identical atomic numbers but different mass numbers. These exchanges are called isotope substitutions and isotope effects.

Subject - general definition

In general, substitution is used to define the exchange of

  • a concept
  • a mathematical term
  • an economic asset by other equivalent term

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