1. The problem statement, all variables and given/known data It's a synthesis, dedicated more to carbonyl reactions. However, there is this step where you deduce the structure of an elongated terminal alkyne and then they tell you to add 1. MeMgBr 2. Formaldehyde. 2. Relevant equations Usually organometallics are used to transform the carbonyl group into an alcohol, or to open epoxides. I have been checking books and I could not find a reaction between the alkyne triple bond and organometallics. 3. The attempt at a solution I suppose that since I can't use them to interact with the triple bond, they have to be used as a base. Am I in the right?