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Cikloalkin

Ciklooktin: najmanji cikloalkin koji se može izolovati

U organskoj hemiji, cikloalkin je ciklični analog alkina. Cikloalkini se sastoje od zatvorenog prstena ugljenikovih atoma koji sadrži jednu ili više trostrukih veza. Cikloalkini imaju opštu formulu Cn H2n-4 Usled linearne prirode C-CΞC-C alkinske grupe, cikloalkini su obično visoko napregnuti i mogu da postoje kada je broj ugljenikovih atoma u prstenu dovoljno veliki da omogući neophodnu fleksibilnost za geometriju prstena. Konsekventno, ciklooktin (C8H12) je najmanji cikloalkin koji se može izolovati i čuvati kao stabilno jedinjenje.[1] Uprkos tome, manji cikloalkini se mogu formirati i zarobiti u podesnom reagensu.

Cikloalkini se mogu proizvesti putem reakcija β-eliminacije sa analogno supstituisanih cikloalkena. Alternativno, oni se mogu proizvesti putem ekspanzije prstena cikličnih alkilidin karbena.[2]

  1. ^ cycloalkyne (chemical compound) - Britannica Online Encyclopedia
  2. ^ An experimental and theoretical evaluation of the intramolecular reactions of cyclohexyne John Tseng, Michael L. McKee, and Philip B. Shevlin, J. Am. Chem. Soc.; 1987; 109(18) pp 5474 - 5477; . doi:10.1021/ja00252a028.  Недостаје или је празан параметар |title= (помоћ)
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Cikloalkin
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