Question

2. Be able to decide when to use sodium borohydride and when to use lithium aluminum hydride for reducing an aldehyde. 3. If you reduce a compound containing an aldehyde, what qualitative test would you use to determine if the product is good or bad? 4. Draw the mechanism for the reduction of vanillin vanillyl alcohol. Oxidation of an Aldehyde (Vanillin III) 5. Be able to determine the oxidation of carbon in different molecules. 6. Write the mechanism for this reaction. 7. If you oxidized a compound containing an aldehyd what qualitative test would you use to determine if the product is good or bad? 8. You will be given two IR's. One for 4- hydroxybenzaldehyde and one for 4-hydroxybenzoic acid. Explain the differences by labeling the distinguishing peak(s).

Answer 1

Ques-2 Sodlum Bomby dulde P Mild Reduưng Agent used for Reduction of ketonus and Aldenydus only Li Ally B a strong Oxfcuzing agent reduces Kurones Alde nydes, en esters and Aids mostly By Nabhy is used fou Reduction of Aldehycles and Ketones Blus 3 AH Reketion. Ath t) quauratim Test Aldehyde will glue fositue 214-DNP Test Ce Alwhol wºu Not give 214 DNP Test ntre ppujo Alcohol will giu wine-Red Colour with Cevúc Ammonium Mübare Caan) and aldehyde glu Negariu Test ] IR Specnosupy Broad in O-H Alcohol Peak in 6/0 3400-3200 m) which will lee absent in Aldehyde

9 щg - 4 Mechanism Н Н. 1 Na +8 — Н + ВНЗ о | тофа 63 ОН ОН о ІН -н NaOH + | ои, ОН