Which of the following is(are) formed upon addition of 1 mol of Br2 to 1,3-cyclohexane? Br Br 1, 2 and 3 only 2 only 1 and 3 only 2 and 4 Br Br Br 3 2 Br Br Br
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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 CH₂Which of the following is least soluble in hexane? * COOH A^ А B с E D FM COOH COOH COOH COOH 1 p COOHWhat is the empirical formula for C3H6O3? C3H6O3 C6H12O6 CH2O None of these
- When 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 gvenThe reaction of methoxy benzene with hydrogen iodide will yield a phenol and an alkyl halide. Which of following choices is the correct combination of the products?The 6-member pyranose ring of glucose is formed through the interaction of the hydroxyl group on C5 with the aldehyde group What kind of ring is formed when the hydroxyl group on C4 attacks instead? Draw the Haworth projection of the products with all the carbons labelled accordingly and name them Why would ring formation through C6 or C3 be unfavorable?
- A decapeptide has the following acid composition; Al2,Arg,Cys,Glu,Leu,Phe,Val Partial hydrolysis yield the following tripeptides; Cys-Glu-Leu+Gly-Arg-Cys+Leu-Ala-Ala+Lys-Val-Phe-Gly Reaction of the decapeptide with 2,4-dinitrofluorobenzene yields 2,4-dinitrophenylysine. From the experimental data, deduce the primary structure of the decapeptide. Suggest a scheme you will follow to synthesize the dipeptide Ala-Gly.Consider the intermolecular forces present in a pure sample of each of the following compounds: CH₃CH₂OH and CH₃COCH₃. Identify the intermolecular forces that these compounds have in common.The 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
- What is the correct designation of this alkene? cis o transWhen pentane is exposed to Br2 in the presence of light, a halogenation reaction occurs. Write the formulas of:(a) All possible products containing only one bromine(b) All possible products containing two bromines that are not on the same carbonWhich of the following group is present in thymine but absent in uracil? NH3 COOH C=O OCH3 CH3