To prepare butanoic acid from 1-propanol, which sequence of reagent(s) is/are best employed? A K,Cr20, in acid B (1) PBr3; (2) NACN; (3) H2O; (4) [H*] LİAIH4 D) (1) NaCN; (2) H2O; (3) [H*]
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- To prepare butanoic acid from 1-propanol, which sequence of reagent(s) is/are best employed? a) (1) NaCN; (2) H2O; (3) [H+] b) LiAlH4 c) K2Cr2O7 in acid d) (1) PBr3; (2) NaCN; (3) H2O; (4) [H+]Acid-catalyzed hydrolysis of a nitrile to give a carboxylic acid occurs by initial protonation of the nitrogen atom, followed by nucleophilic addition of water. Review the mechanism of base-catalyzed nitrile hydrolysis in Section 20-7 and then predict the products for each reaction below and write all of the steps involved in the acid-catalyzed reaction, using curved arrows to represent electron flow in each step.A student attempted to prepare 1-chlorobutane by mixing 1-butanol with NaCl in acetone. Was the student succesful? Explain.
- 22- Give one example for the hydration of Alkene: That is the Addition of H2O byoxymercuration. Give the proper Mechanism if possible.23- Give one example for the hydration of Alkenes: that is: the addition of H2O byHydroboration.We react 2-propanone with 1º NaCN, H+, 2º LiAlH4 and 3º H3O+. Indicate the final product. Comment reactions.Enamines formed from the cyclic secondary amine pyrrolidine are important intermediates in the synthesis of 1,5-diketones. (1st pic) On the structures provided below, draw arrows showing electron flow for the reaction mechanism for the acetic acid-catalyzed formation of an enamine from cyclohexanone and pyrrolidine. (2nd pic)
- Give only typing answer with explanation and conclusion What are the schemes for the following reactions?: Schemes: 1.Benzoic acid in NaOH 2.Acetic acid in NaHCO3 3.Propan-2-amine in waterHeating toluene in the presence of KMnO4 followed by acification with HCl, converts toluene into benzoic acid. Using this information and any other reactions discussed in this course, show a sequence of reactions showing howing toluene can be converted to p-aminobenzoic acid.In light of your answer to Problem 30-40, explain why a mixture of products occurs in the following reaction:
- The reaction of sodium borohydride with ketones proceeds rapidly at room temperature, forming an intermediate borate ester which is hydrolyzed to give the product alcohol: 4 R2C=O + Na+BH4- ---> (R2CHO)4B-Na+ (R2CHO)4B-Na+ + 2H2O ---> 4R2CHOH + Na+BO2- Rewrite these two steps using benzil as the ketone, and using structural formulas throughout, rather than the condensed forms above.E. TESTS FOR PHENOLIC COMPOUNDSPhenolic compounds such as phenol, salicylic acid, etc., give characteristiccolors with FeCl3 and Millon’s Reagent.1. Ferric Chloride TestAdd 5 drops of FeCl3 solution to 4 different test tubes containing 1 mL each ofdilute solutions of the following compounds and note the color obtained.a. Phenol _______________________________________________________________b. Salicyclic acid ___________________________________________________________c. Resorcinol _______________________________________________________________d. Picric acid _______________________________________________________________2. Millon’s TestPrepare another set of 4 test tubes containing 1 mL each of the solutions listedbelow. Add 3 drops of Millon’s reagent to each and place all the test tubes in aboiling water bath. Note the color formed.a. Phenol _______________________________________________________________b. Salicylic acid ___________________________________________________________c.…The mechanism of the Fischer esterification was controversial until 1938, when IrvingRoberts and Harold Urey of Columbia University used isotopic labeling to follow thealcohol oxygen atom through the reaction. A catalytic amount of sulfuric acid was addedto a mixture of 1 mole of acetic acid and 1 mole of special methanol containing the heavy18O isotope of oxygen. After a short period, the acid was neutralized to stop the reaction,and the components of the mixture were separated.H2SO4OCH3 C O H CH3 O H CH3 C O CH3 H2OO18 + +(a) Propose a mechanism for this reaction.(b) Follow the labeled 18O atom through your mechanism, and show where it is found inthe products.(c) The 18O isotope is not radioactive. Suggest how you could experimentally determinethe amounts of 18O in the separated components of the mixture