- A chemical reaction or transformation of the general type:
I03058-1.png in which the connecting atom or group Y replaces the bond joining the parts X and Z of the reactant XZ. An example is the carbene insertion reaction:
I03058-2.png The reverse of an insertion is called an extrusion.
See also: α-addition
PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1125 (https://doi.org/10.1351/pac199466051077)
- A general term given to a reaction involving the transfer of a guest atom, ion or molecule into a host crystal lattice.
See: topochemical reaction, topotactic reaction, intercalation reaction
PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 583 (https://doi.org/10.1351/pac199466030577)