Depto. Química Orgánica

SUPERIOR AND POLYCYCLIC CYCLOALCANES

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15/07/2017
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The cycloalkanes with ring sizes larger than cyclohexane lack symmetry and bear some tension, until we reach cyclotetradecane wide enough for the carbons to adop the perfect zig-zag conformation attained in acyclic linear alkanes.
Image Cyclotetradecane
In cycloalkanes different from cyclohexane there are not truly axial and equatorial positions. These are found again for cyclotetradecane and superior cycloalkanes.
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Cicloheptane
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In the main page of the cycloalkanes topic there is a good sample of polyciclic compounds.
One can fusion rings in any imaginable, possible way.
The number of possibilities is unlimited.Image
Carbon can tolerate a large bond tension and, believ it or not, these compounds have been obtained in the lab:
Image Bicyclo[1.1.0]butane
Image Tetra-tert-butyltetrahedrane
Image Cubane
Image Dodecahedrane