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- Dehalogenase enzymes catalyze the clevage of C-X bonds. One such dehalogenase catalyzes the following reaction. An active site aspartate is thought to carry out the initial nucleophilic attack that expels the chloride. Select the most likely intermediate in the reaction. (Note the stereochemistry. Refer to P11.19 in the textbook if needed.) O O A C D OE -CH₂ H H₂C™ CO₂ H B CO₂ CI N H₂O Cr CO₂ H CO₂ нотум CH3 D CO₂ five N E CH₂Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =(a) (S)-2-chlorobutane, draw a three-dimensional representation.
- Write the saponification reaction of the following triglyceride with NaOH CH3 H-C-O CH3 Н-С-О `CH3 Н-С-О.explain and describe briefly the structure of MgO-NH2-Ru-Pd-Sn (MgO) o-și-(CH,);NH; RuClx -0-Si (CH,);ÑH, -0-Si(CH,),NH, PdCly -0-Si(CH,),ÑH, -0-SHCH;);NH, SnClz -0-Si (CH,);NH;[enantiomeric excess] Suppose a mixture that has 10g of (-)-dextrose (a=-66) and 5g of (+)-dextrose (a=+66). Find the amounts (in g) of (-)-dextrose and (+)-dextrose if the (-)-dextrose is converted to (-)-dextrose which the resulting mixture exhibits a rotation of (amix=+49.5).
- In the electrolysis of aqueous sodium bromide, there are two possible anodic reactions: *2H2O(l) ——-> 02(g) + 4H+(aq) + 4e–, E° = 1.23V2Br–(aq) ——–> Br2(g) + 2e-2, E° = 1.08 VWhich reaction occurs at anode and why?How many H2O particle were produced by creating the following structure if the starting reagent is glucose? * CH,OH CH,OH CH,OH OH OH OH ÓH ÓH 300 O A.) 30 О в ) 301 О с) 302 O D.) 300 O E.) 150 O F.) OThe Keq for the reaction of water with water is called Kw H2O + H2O ⇔ H3O+1 + OH-1 [H3O+1][OH-1] Kw = ––––––––––––– = [H3O+1][OH-1] = (1 x 10-7)2 = 1 x 10-14 [H2O]2
- This is remdesivir, one of the drugs being used in the treatment of COVID-19. Label the indicated carbons as R, S, or neither. b); NH2 HO OHName the following fatty acid CH3-CH2-CH=CH-CH2-CH=CH-CH2- CH=CH-(CH2)7-COOH O 18: 3A6,9,12 18: 2 w3 O 18: 3 w6 18: 3A9,12,15When a mixture of 3-phosphoglycerate and 2-phosphoglycerate is incubated at 25°C in the presence of the enzyme phosphoglycerate mutase (which catalyzes the intervconversion of the two substances) until equilibrium is reached, the final mixture contains 6 times as much 2-phosphoglycerate as 3-phosphoglycerate. Which of the following statements is most nearly correct when applied to the reaction shown below: 3-phosphoglycerate ------> 2-phosphoglycerate (R=8.315 J/mole.K) A. △G°' = +12.7 kJ/mole B. △G°' = 0 C. △G°' is incalculably large and positive D. △G°' = -4.44 kJ/mole E. △G°' cannot be calculated from the information gven