CHEM- Janusy 21 ore 15) Provide a mechanistic explanation for the observed mixture of products in the following SN1 reaction. エー D2C CH2-Br CHОН H. H. D2c-Cc-OCH3 H2 Học3DC" НОССОСНЗ D2 SN1 What would you expect the approximate ratio of these products to be? 16)
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- Which of the following represent the reagents in the correct order for the synthesis of the target molecule? 1. CH3CI, ALC!3; 2. H2/Pd; 3. NBS, light А 1. CH;COCI, ALC!3; 2. Zn(Hg), HCl; 3. NBS, light В 1. CH3COCI, AlCl3; 2. Br2, FeBr C 3; 3. H2/Pd 1. CH3CH2CI, AlCl;; 2. Br2, FeBr3; 3. NBS, light Br 1) 2) 3)Q2/ Write a suitable mechanism in full details for the following reactions. NH, NH2 I2. NaHCO, 1- 2- Ar- NO, + 6HCI + 38n- - Ar-NH,+ 2H,0 + 3SnC, 3- CH. HNO, Ph-NO2 4. H,SO, (0- s)°c 4- a- Ph-NH, + NANO, +HCI - Ph-N2CI + 2H,0 +NaC! HO он (10%) NaOH b- Ph-NCI Ph-N N- +HCI18 of 21 60. Select the compound that is not an intermediate in the following organic transformation. ОН НО НО НО ОН ОН ОН А 61. When treated with 0.01 M HCI, molecule _will be protonated to the greatest extent while molecule will be protonated to the least extent. NH2 II IV || O=N* а. 1, I b. III, I C. III, II d. III, IV 62. Identify the mechanistic step in a Claisen condensation with the largest equilibrium constant value. a. initial proton transfer by ethoxide to yield the enolate ion b. nucleophilic attack of the enolate ion on the ester electrophile c. reformation of the carbonyl to promote heterolysis of the alkoxide leaving group d. proton transfer of the alkoxide on the newly formed beta keto ester substrate
- Which of the following represent the reagents in the correct order for the synthesis of the target molecule? 1. Cl2, FeCl3; 2. CH;CI, AIC!3; 3. КMnO4, Hз0+ A 1. CH3CH2CI, AlCl; 2. Cl2, FeCI 3; 3. KMNO4, H3o+ В 1. CH3COCI, AlICl3; 2. Cl2, FeCl C 3; 3. H2NNH2, NaOH 1. CH3CI, ALCI3; 2. KMNO4, H3 ot 3. Cl2, FeCl3 + CI 1) 2) 3)с-НCI (1 drop) H. OCH2CH3 H2N NH2 O2N ethanol, reflux 1. major product 2. the most plausible mechanism plzWhich of the following represent the reagents in the correct order for the synthesis of the target molecule? 1. Cl2, FeCl3; 2. CH;Cl, AIC!;; 3. KMNO4, H30+ A 1. CH;CH2CI, AlCl3 2. Cl2, FeCl 3;B 3. КMпO4, Hз0+ В 1. CH3COCI, AIC[3; 2. Cl2, FeCl C 3; 3. H2NNH2, NaOH 1. CH3CI, AIC3; 2. KMNO4, H3 ot 3. Cl2, FeCl3 CI 1) 2) 3)
- ucf.edu/courses/1379813/quizzes). Question 12 Identify the major product from the following series of reactions. 1. NaOEt 1. NaOEt 2. CH3CH2CI OEt 2. H30*, Quendch 3. H30*, Heat но он HO H.Which of the following represents the correct transition state for a hydroboration reaction mechanism (use the correct number or your answer: 1, 2, 3, or 4)? Also, answer any follow-up questions. Anne + BH₂ CH₂ H₂B----H Hiine. R 2 CH₂ H 3 ansition state of hydroboration is best described by structure number -CH₂ "do e term (one word) that describes the stereocontrol of the hydroboration reaction? te da term that describes the regiocontrol of the hydroboration reaction? the term (one word) that best describes how the bonds are broken and formed in the first step of a hydroboration ism? 4 BH₂ CH₂2 hp4) Complete given reactions. (They have missing parts) Categorize them accerding to their forbidden degrees and write their type of passing (0*) > 42 22 -> 49 50 Hel ) 3 3 c) -> 2 76 76 Se lo7) -> 34 (P 35
- Draw the structures of the starting material and the four missing intermediates. он H2O2, H2SO4, MeOH allyl bromide, K½CO3 acetone, reflux (97%) MeO OMe (99%) ÒMe Оз. Осм, МеОн, -78°С then Me,s DMF, 190 °C BnBr, K2CO3 acetone (99%) (93%) (78%) Br OBn NBS, DCM (95%) Meo OMe ÓMeConsider the following overall reaction that uses liquid acetone (CH;COCH3) as a reactant to produce a compound with two different functional groups. The reaction follows this mechanism: 2 f.,,.e f.....f .. + H2O (1) + :OH 6.. :OH མེན་གྱིས་ འབུ་ ིམ་མི་ ོ་ ེ་ ི་ ་ :OH What is true for the first step in the this mechanism? O AH > o ( Endothermic) AH o ( Exothermic)What is(are) the major final product(s) formed during the following sequence of reactions? 01 11 V 1.0₂ 2. (CH₂)₂S C₂H₂O 2 identical molecules ||| =PPhy < IV орна