Organic: Alkene to Alkyne I am trying to do a synthesis of 2-Octyne from 1-heptene. Conversion of the triple bond to a double bond is pretty easy, but i also have to add an alkyl group, and the double bond must remain on the original triple bond location. Thus, so far thoughts: 1. remove hydrogens from double bond 2. add ch3 to terminal carbon to replace hydrogen. CH3-BR ? Question 2: Propose a synthesis of cis-3-octene starting from 1-hexene.