insertion

https://doi.org/10.1351/goldbook.I03058
  1. A @C01033@ or @T06446@ 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 @I03077@:
    I03058-2.png
    The reverse of an insertion is called an @E02311@.
    See also:
    α-addition
    Source:
    PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1125 [Terms] [Paper]
  2. A general term given to a reaction involving the transfer of a @G02711@ atom, ion or molecule into a host crystal lattice.
    See:
    intercalation reaction
    ,
    topochemical reaction
    Source:
    PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 583 [Terms] [Paper]