Isomerization
In chemistry, the conversion of a molecule , i.e. a change in the sequence or arrangement of atoms, into another isomer with an unchanged molecular formula is called isomerization . In some molecules and under certain conditions, isomerization occurs spontaneously. Many isomers have the same or almost the same binding energy , as a result of which a relatively free conversion / interconversion takes place. If an isomerization occurs within a molecule, one speaks of a rearrangement . If the educt and the product do not differ, one speaks of automization .
Isomerization can e.g. B. be effected photochemically , thermally or catalytically .
Examples
- Photochemically induced conversion of a trans -alkene into a cis -alkene.
- Rearrangement of straight-chain to branched alkanes .
- Conversion of an enantiomer into a racemate (1: 1 mixture of two enantiomers) - ( R ) becomes ( RS ); ( S ) becomes ( RS ).
- Base catalyzed conversion of allenes to alkynes .
Web links
Individual evidence
- ↑ Ivan Ernest: Binding, Structure and Reaction Mechanisms in Organic Chemistry , Springer-Verlag, 1972, p. 329, ISBN 3-211-81060-9 .
- ^ Siegfried Hauptmann : Organic Chemistry , 2nd revised edition, VEB Deutscher Verlag für Grundstoffindustrie, Leipzig, 1985, p. 209, ISBN 3-342-00280-8 .
- ↑ Eberhard wide Maier, Günther Jung: Organic Chemistry, 7th edition, Thieme Verlag, 2012, p 286, ISBN 978-3-13-541507-9 .
- ^ Siegfried Hauptmann : Organic Chemistry , 2nd revised edition, VEB Deutscher Verlag für Grundstoffindustrie, Leipzig, 1985, p. 246, ISBN 3-342-00280-8 .