α-elimination

https://doi.org/10.1351/goldbook.A00007
  1. A
    transformation
    of the general type:
    where the
    central atom
    Z is commonly carbon. The reverse reaction is called
    α-addition
    .
    Source:
    PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1088 [Terms] [Paper]
  2. General term applied to a reaction by which a group attached to the alpha carbon of an excited
    chromophore
    is expelled either as an odd electron species or as an ionic species.
    Note:
    This reaction should be distinguished from an
    alpha-(α-)cleavage
    .
    Source:
    PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 302 [Terms] [Paper]