Rotane
Encyclopedia
The rotanes are a class of hydrocarbon
Hydrocarbon
In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons from which one hydrogen atom has been removed are functional groups, called hydrocarbyls....

 consisting of spiro-linked cyclopropane
Cyclopropane
Cyclopropane is a cycloalkane molecule with the molecular formula C3H6, consisting of three carbon atoms linked to each other to form a ring, with each carbon atom bearing two hydrogen atoms...

 units having a common n-membered ring in the middle.

They are named [n]rotanes depending on the number of carbon atoms in the middle ring. The simplest of them, [3]rotane, is a branched triangulane.
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