Which absorbance wavelength is responsible for the observed purple color? 2) What purpose does the base serve in this reaction? What is the name of the intermediate that it generates? Can this reaction proceed without adding base? 3) Suppose instead of using dibenzylacetone we used benzophenone. Would this reaction work? Why or why not. 4) This reaction was carried out in ethanol. Provide a specific reason why this experiment would not work well if carried out in hexanes.