Ok, so I know that alcoholic alkoxides react with monohalogenoalkanes to form ethers. I was unsure of naming Y, but it turned out to be an ether. Is this a little bit of knowledge that has passed me by? Can somebody explain the mechanism to me? I know the carbonyl group is polar and the carbon in it is susceptible to nucleophilic attack, but can somebody explain it in this context?
EDIT: Just realised that the O on the C3H7O is actually O-. Makes more sense now.
Over the Easter break