cycloalkanid
A cycloalkanid is a cyclic hydrocarbon anion. It is formed by removing a proton from a cycloalkane, typically by deprotonation with a strong base. The resulting negative charge is delocalized within the ring, making the cycloalkanid a relatively stable species compared to acyclic carbanions. The stability is further enhanced by the ring strain inherent in smaller cycloalkanes. Common examples include cyclopropylidene, cyclobutylidene, and cyclopentadienyl anion.
Cycloalkanids are important intermediates in organic synthesis, particularly in reactions involving nucleophilic attack or radical chemistry.
The reactivity of a cycloalkanid is influenced by the size of the ring and the substituents attached