Which of the following bonds would be difficult to form when using diorganocopper (Gilman) reagent? OD OF OE OA O B OC B C D all A-D none of A-D F
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- 1. Write balanced redox rxns for the rxn of KMnO4 with compound A to give compound B 2. Draw the products obtained from the following rxnWhat is the purpose of using NaHCO3 solution in the isolation step of the Fischer esterification reaction? Draw a reaction scheme to support your answer.A wittig reaction experiment: Week 1 -》 preparation of phosphonium salt Materials : triphenylphosphine (5.3g),methyl Bromoacetate 3.36g (2.1ml) , ethanol 30ml . The yield obtained was 8.93g . Calculate the percentage yield Week 2 -》 Formation of the tlide and wittig reaction Materials :Phosphonium salt (5g), napthyl-2- carboxwaldehyde( 2.65g), 20 ml of water and 5 nl of Nahco3. Yield obtained was 0.51g .Calculate the percentage yield Week 3: Solvent free wittig reaction Materials: Benzyltriphenylphosphonium chloride (0.5g ), 4 - Bromoabenzaldehyde (0.24g), Potassium phosphate (tribasi c) 0.275g .The yield obtained was 1.21g. Calculate the percentage yield
- 2-Chlorobutane reacts much more slowly than 2-chloro-2-methylpropane in the silver nitrate test. Explain this difference in reactivity.When oxalic acid is added to water the oxalic acid will dissolve. If D2O were used in place of H2O would the deuterium become incorporated into every site where there was a hydrogen atom in the original structure? Explain2. Anhydride means “without water”. Suppose 1 M H2SO4 were substituted for the concentrated H2SO4. Would the yield of acetylsalicylic acid be increased, decreased, or unaffected by the substitution? Explain.
- For the following pairs, determine what could be the best solvent to differentiate them based on their predicted solubility. 1. beta-naphthol and butyric acid 2. anthracene and benzylamine 3. p-xylene and benzaldehydeResults and Discussion: Nitroprusside Reaction: Samples: cysteine, cystine, glycine Reagents: Saturated Sodium Carbonate (Na2CO3) solution, Saturated Sodium Nitroprusside solution, 1.0% sodium cyanide (NaCN) -To 0.5 ml of the sample, add 0. 25 ml of saturated sodium carbonate solution and a drop of freshly prepared saturated solution of sodium nitroprusside (HANDLE WITH CARE). A purple color will develop if free sulfhydryl groups are present. If negative, add 1 drop of 1.0% NaCN. The development of a red color indicated the presence of disulphide bonds.Kiko, a Chem 31.1 student, accidentally shuffled two test tubes with different compounds on his way to the laboratory. To confirm the possible identities of the compounds, Kiko added neutral KMnO4 and Lucas reagents to both test tubes labeled A and B. Test tube A gave a brown precipitate in neutral KMnO4 while test tube B produced a purple solution in the same test. Upon subjecting to Lucas Test, both test tubes produced layers. Which of the following are the possible identities of the compounds A and B? a. Sec-butanol and 3-methyl-3-pentanol b. n-propanol and tert-butanol c. isopropyl alcohol and 4-nitrophenol d. hexanol and cyclopentanol