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- 31. Which mechanism is correct for the following intramolecular substitution reaction? (a) (b) (c) 4- H-N H H N: H H₂N N: он --مرح CI CI CI H H CI N: NaOH N: CI *H :OH -- NH NH CNH на он NH NHWhich mechanism describes best the reaction below? LARV 2021 DS H,0 A H-ỎH, HO B H-ÓH, CH Under described conditions, this reaction is not possible O B OD O A étv DD F12 F1 令didentify the Allowry reactions, as substitution, elimination, or addition DrawWelection arrows to show how the in each reactors Circle and identify any reactive bands break & form intermediates of carbon. Ħ Br Br → AH-Br →→ → XB²
- Following is an equation for iodination of toluene. This reaction does not take place. All that happens under experimental conditions for the formation of radicals is initiation to form iodine radicals, I , followed by termination to reform I2. How do you account for these observations?Which mechanism is this reaction most likely to use? SN1 OSN2 NaSH SHWhat is the rate expression of •CH4+Cl2 = CCl4+HCI •KClO3=KCl+O2?
- The following figure shows the energy profile of a nucleophilic substitution reaction. Potential energy :ÖH H HII.C H C-1 H HO--C---I HH Reaction coordinate H -CH HO–CHITH H + 1 According to this, it is correct to affirm: O The activation energy (4G°) shows that it is thermodynamically favorable. O Represents a reaction that occurs in one step where a pentavalent chemical species is formed. O The intermediate has lower energy than any transition state. O The formation of the intermediate releases energy and is therefore thermodynamically favourable.4. Proposed the mechanism for the following reaction. Show the name of each step such as oxidative addition, reductive elimination, migratory insertion etc. Explain the selectivity based on the reaction mechanism. Ph MEO2C Cat. (RHCI(CO)2lk co.Me Ph Ph- CO Ph co,Me Ph Ph minor majorWhich disconnection leads to the most reasonable retrosynthesis of the given target molecule 7 O Y=h =7 -37
- S-adenosylmethionine reacts with norepinephrine to form epinephrine. : OH sor :5: HO HO norepinephrine HO HO :5: Draw curved arrows to show the first step of the mechanism. Do not alter the pre-drawn structures. HO S-adenosylmethionine NH₂ : OH —s: NH₂ НО, HO : ÖH epinephrine OH N NH₂ N:Given the dissociation constants for each deprotonation, what is the dissociation constant for the overall reaction (Ka’’)? H3PO4 + H2O H2PO4- + H3O+ Ka = 7.11 x 10-3 H2PO4- + H2O HPO42- + H3O+ Ka’ = 6.32 x 10-8 Overall: H3PO4 + 2 H2O HPO42- + 2 H3O+ Ka’’ = ? 1.13 x 105 4.49 x 10-10 8.89 x 10-6 2.23 x 109Given the dissociation constants for each deprotonation, what is the dissociation constant for the overall reaction (Ka’’)? H3PO4 + H2O H2PO4- + H3O+ Ka = 7.11 x 10-3 H2PO4- + H2O HPO42- + H3O+ Ka’ = 6.32 x 10-8 Overall: H3PO4 + 2 H2O HPO42- + 2 H3O+ Ka’’ = ?