Annulenes hydrocarbons with alternating single and double bonds cyclobutadiene benzene cyclooctatetraene cyclodecapentaene [4]annulene [6]annulene [8]annulene [10]annulene 013 Pearson Education.Ine. Not all cyclic conjugated hydrocarbons are ● cyclobutadiene is and ● Cyclooctatetraene can Br2 to the double bond. 2013 Pearson Education,Inc. Chapter 16 © 2013 Pearson Education, Inc. Chapter 16 6 Annulenes • hydrocarbons with alternating single and double bonds. • Not all cyclic conjugated hydrocarbons are ________. • cyclobutadiene is ________ and __________ • Cyclooctatetraene can ____ Br2 to the double bond