It is possible that the product, acetylferrocene, can react further to give diacetylferrocene. What is the most likely structure of diacetylferrocene? Explain the regioselectivity of the second acylation reaction. 2. How could NMR be used to differentiate the possible structures of diacetylferrocene? 3. Acetylferrocene was recrystallized, and the mass of crystals were recorded. What could be done at this point to isolate more acetylferrocene and improve the yield of the reaction?