Given an alkyl chloride, how would you carboxylate it and add to the chain by one? (cyanide method) Carboxylic Acids Given an alkyl chloride, how would you carboxylate it and add to the chain by one? (cyanide method) Answer: 1. NaCN, DMSO 2. H2O, H2SO4, heat Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+