(Solved): 1. Calculate the number of moles of propiophenone and sodium borohydride used in your experiment? ...

1. Calculate the number of moles of propiophenone and sodium borohydride used in your experiment? Identify the limiting reagent and calculate the theoretical yield? [3] 2. Draw a detailed reaction mechanism for the reaction (make sure your mechanism includes the role of the boron species) [3] 3. Does your product have a chiral center? If so, how many stereo-isomers of the product are possible? Will the product produced by this reaction be racemic? [3] Experimental Procedures: 1. To a reaction tube, add \( 0.25 \mathrm{ml} \) of propiophenone. 2. Add methanol to the \( 1.5 \mathrm{~mL} \) mark. 3. Cool the solution in an ice bath. 4. While the reaction tube is in the ice bath, carefully add \( 100 \mathrm{mg} \) of sodium borohydride. 5. After any vigorous reaction has ceased (5-10 \( \mathrm{min}) \) remove the tube from the ice bath and allow standing for 20 minutes at room temperature with occasional mixing to suspend solids after which time the reaction should have gone to completion. 6. To decompose the borate ester, add \( 1.5 \mathrm{ml} \) of \( 3 \mathrm{M} \mathrm{NaOH} \) solution to the tube and mix thoroughly, then allow the reaction mixture to stand for 5 minutes. 7. Extract the resulting mixture with five \( 1 \mathrm{~mL} \) portions of ether collecting the ether in a test tube 1. Calculate the number of moles of propiophenone and sodium borohydride used in your experiment? Identify the limiting reagent and calculate the theoretical yield? [3] 2. Draw a detailed reaction mechanism for the reaction (make sure your mechanism includes the role of the boron species) [3] 3. Does your product have a chiral center? If so, how many stereo-isomers of the product are possible? Will the product produced by this reaction be racemic? [3]