Use ChemDraw to draw the following reactions with blue arrows to illustrate the mechanism, while also showing full reagents, for:
(i) oxidation of an alcohol to an aldehyde;
(ii) reduction of a ketone to a secondary alcohol;
(iii) a Diels-Alder reaction that does not involve REDOX reactions at all.
Answers may involve hydrogenation reactions and hydrogenolysis reactions. Display the functional group of i and ii in any particular molecule, but make sure that the arrows display an oxidation or reduction of the functional group.