Chapter 11, Problem 74AP

The two pKa values of oxalic acid are 1.25 and 3.81. Why are they not the same value? Show the protontransfer as part of your explanation. *see image

асть Identify all the bonds that gauche interact with C-OMe in the most stable conformation of the above compound.

Predict the reactants used in the formation of the following compounds using Acid-Catalyzed dehydration reaction

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.. Give the major organic product(s) for each of the following reactions or sequences of reactions. Show ll relevant stereochemistry [3 ONLY]. A H Br 1. NaCN 2 NaOH, H₂O, heat 3. H3O+ B. CH₂COOH 19000 1. LiAlH4 THF, heat 2 H₂O* C. CH Br 1. NaCN, acetone 2 H3O+, heat D. Br 1. Mg. ether 3. H₂O+ 2 CO₂ E. CN 1. (CH) CHMgBr, ether 2 H₂O+

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1. Draw structures corresponding to each of the following names [3 ONLY]: A. 2,2,2-trichloroethanal (chloral). B. trans-3-isopropylcyclohexanecarbaldehyde C. What is the correct structure for 2-hydroxyacetophenone? Circle the letter of your response. a C 0 OH OH OH HO b. H3C CH 0 H d OH D. Provide IUPAC names for each structure below. 0 H C-H 0 0 CH3 H NO₂ E. The substance formed on addition of water to an aldehyde or ketone is called a hydrate or a/an: a. vicinal diol b. geminal diol C. acetal d. ketal

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