EA21 A. B. C. D. H Which one of the following mechanistically depicts the reaction between nitric acid and water ? 8: -6: 4-035 H- H H- 10: Gi H-ö H- ق + - - - N (+ H-8- :0: :0: :0: 6.0 : 0: E. Nitric acid does not react with water
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Org. Chem. 1. EA21
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- PQ-23. At 298 K, the equilibrium constant for this reaction H2(g) + O2(g)= H₂O(l) AG° (kJ mol¹) -237 -229 H₂O(1) H₂O(g) (A) has a value of 1.0 at equilibrium. (B) is larger than the Keq for H2(g) + O2(g)=H₂O(g). (C) cannot be computed since data on O2 and H2 are not provided. (D) will have the same value as the Keq for H2(g) + O2(g)= H₂O(g)Page 114 of 126 a. I, II, and III I and II > Answer 8.83. Consider the following acid-catalyzed hydration reaction: Dilute H₂SO4 OH ㅅ you Which of the following ions are intermediates in the accepted mechanism for this process? 2) H₂O₂, NaOH X. about:sredoc II None of the above. The process is concerted. Only IV Answer OH Xi ( 8.84. Provide suitable reagents for the following transformation. .00 IV Page 115 of 1264. (4a) + NaHCO, - H2O + (4b)_ 5. CH;COOH + CH;CH2OCOCH3 + H2O -COCH3 6. (6a) (6b) - + H2O
- nurbuks alixir 9 and lead). solution of ammonium chloride ) (~Hyl) acetate (Pb(CH3006) ₂ This solid? produces a solid. What is the identity of Bott A. Pb (CH₂COO), B. Pb (NH4)₂ C. (NH4), 4 D) Pb C (W) J Ẹ NH, CH, Coo Expl 49 42-0 CO C-PF St LGO (23 21 HO SA R الموت id boke slit + CXIC moth SHMOB stata Gof the reactions shown below (reactants shown only), which reaction does NOT result in a carboxylic acid as product? I. II. III. IV. V. Select one: OA. V OB. III O C. I OD. N O E. II 0 MgCl :O: CH₂-C-H + O H -CN H₂O H+ H+ H₂O; Heat HBr(aq) H/H₂O heat Cu+2 /OH (Benedict's reagent) SWhat 3 steps would be required to complete the following synthesis? Step 1 = A Step 2 3D в Step 3= B. NABH4, CH;OH C. PCC, CH;Cl; А. , AICI; D. CrO3, H3O* G. HNO;, H;SO4 J. i.propanal, ii. H+, H;0 K. NACN, DMSO M. Žn(Hg), HCI E. TSCI, pyridine H. CH;OH, H F. Bry, Light I. Brz, FeBr; L. i.butanal, ii. H+, H2O O. another reagent N. Mg. Et,0
- Vancomycin is an important antibiotic. It is isolated from the bacterium Streptomyces orientalis and functions by inhibiting bacterial mucopeptide synthesis. It is a last line of defense against the resistant Staph organisms that are now common in hospitals. OH HO, OH H. NHME NH H NH HO,C- “NH2 Vancomycin aglycon ОН НО In 1999, Professor Dale Boger (The Scripps Research Institute) reported a synthesis of vancomycin aglycon (aglycon = lacking a sugar) involving the following steps, among others. Compound (I) was prepared from simple starting materials by a series of steps involving forming amide bonds.1) CO2 (s) g) Ph(CH:)MgBr 2) 11 (aq) H'(aq)/A h) 6-Bromohexanoic Acid + NACN- 1) NaOEt/ELOH i) PhCOHC-CH2 + CH:(CO Et) 2) H (aq), A,-CO. Butanoic Acid 1 equivalent Bry/P H.NEt k) Methyl Benzoate NaOMe/MEOHI I) 2 (Ph) CHCOOME -1:39 17. Provide the major organic product of the reaction shown. Ph O 1. Et-MgBr (xs) 2. H₂O+ Actual S Sen cel
- 2. Predict the structure of the products (A-E) of the following reactions. BugSnH OMe AIBN Toluene, 80 "C OH 1) NaH, CS,, BnBr Ph B HO" 2) BuzSnH, AIBN H Toluene, 80 °C BuşSnH SPh AIBN Toluene, 80 "c 1) LDA, THF, -78 °C then PhSeBr D 2) H202 1) AIBN, SnBu, Me. Br E 2) O, then PPhgWhich of the following reactions can be used to prepare the compound below? Ph Ph Select one or more: (1) LI, hexanes (2) Cul Br Ph Ph-Br Ph Ph a. Pd(PPh,), Et,N Ph Ph-Br 4. Ph Ph b. Ph Grubbs catalyst Ph Ph Pd(PPh,). KOH Ph-B(OMe)2 +. Br Ph Ph Ph Ph-Br. B-H Ph E Pd(PPh,). KOH Ph Ph d.Bn 1) Mel 2) NaH a) b) -NH 1) NANO2/HCI| Cul/MeLi SH COCl2 pyridine -10 °C, THF 2) LIALH4 ОН Yegt MeO2C- -CO,Me TICL, Zn THE NaH, THF reflux OH N, Bn h) Sn, HCI 1) nBuLi, 2) O i) Zn/Cu CH212 S. NO2