Alicyclic compounds

Alicyclic compounds (including alicyclic called), or cycloaliphatic compounds and cycloaliphatic , are saturated or unsaturated cyclic compounds in which the ring-forming atoms excluding carbon atoms are ring systems and the aliphatic structure have. So there are carbocyclic and therefore homo- or isocyclic compounds that, in contrast to aromatics , do not meet the aromaticity criteria ( Hückel rule ).

The term contains the terms aliphatic and cyclic and thus defines itself as the amount of those compounds that can be imagined to be formed by the cyclization of aliphatic hydrocarbons.

All cycloalkanes and derivatives, as well as cycloalkenes and cycloalkynes, are therefore alicyclic, as are compounds with bridged carbon skeletons, for example norbornane. Heterocycles are not alicyclic compounds.

Some examples of alicyclic backbones:

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  Cyclobutadiene

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  Cyclopentadiene

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  Cyclohexane

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  Norbornane

Individual evidence

1. ^ Adalbert Wollrab: Organic chemistry. 4th edition, Springer, 2014, ISBN 978-3-642-45143-0 , p. 176.
2. ↑ Entry on alicyclic compounds . In: IUPAC Compendium of Chemical Terminology (the “Gold Book”) . doi : 10.1351 / goldbook.A00216 Version: 2.3.3.
3. ^ Hans Beyer and Wolfgang Walter : Textbook of organic chemistry . 19th edition, S. Hirzel Verlag, Stuttgart, 1981, p. 51.