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- 4. (4a) + NaHCO, - H2O + (4b)_ 5. CH;COOH + CH;CH2OCOCH3 + H2O -COCH3 6. (6a) (6b) - + H2OQ.2) A.) Write down what the products a, b, c, D, e, F, G, H, i, J and K are in the following reactions. LDA CH;-I 0°C + SOCI; NH,CH,CH,NH, Ag0. NAOH HO. A H,0 LIAIH, H;0 CH,CHCN H Eter Raney Ni HSCH,CH,SH B.) Write down the reduction reaction of each molecule using appropriate reagents, sorting the compounds given below according to their ease of reduction. CH3 но CH CH,0 -CHs C.) Obtain oxidation reduction products in four different ways using benzaldehyde and appropriate reagents and reactions.Page of 11 ZOOM + Section A (continued) A18. Give suitable nucleophiles (1 and 2) for the following organic reactions: 1 2 H3C H3C OMe H3C 1 = MEOH; 2 = NH3 1 = H2O; 2 = NH2ET 1 = NaOMe; 2 = NH2ME 1 = MEOH; 2 = NH2ET %3D %3D В %3D %3D A19. How would you categorize the atoms labelled in the figure below? H2N CH3 Atom B Atom A Both atom A and atom B are electrophilic Atom A is nucleophilic; Atom B is electrophilic Both atom A and atom B are nucleophilic Atom A is electrophilic; Atom B is nucleophilic A B A20. Rank the following acids from highest to lowest pKa. CI CI F CH3 Но HO CI HỌ Но CI A C D А A>D>B> C C>D>B>A C A >B> D> C C > B >D> A 明 ABC
- 6) What is the nucleophilic site in the following compounds? H3C-0-CH3 H2C=CH2 CH;NH2 II II A) | = Hydrogen; I| = TT electrons in bond; III = nitrogen. %3D B) | = Oxygen; II = carbon; III = nitrogen. C) Hydrogen; II = carbon; III = carbon. %3D D) | = Oxygen; II = TT electrons in bond; III = nitrogen.a) Complete the following reactions: (i) H3C-C-Ci + H2O A + B (ii) HO H;C. CH3 SOCI, с + D + so, (iii) H;O* HCN E F CH;CH, `CH;3 (iv) CH;CH,CH,CH,CH,Br + NH3 G + H excessWhich of the following reaction scheme is expected to atford the tollowing product? HO ОН O The following scheme: 1. Mg, Et,0 Br 2. H H. 3. H;O* O The following scheme: 1. Mg. Et.O HO Br H. H30* O The following scheme: 1. TBS-CI, imid., CH CI, HO Br 2 Mg. Et,0 3. H. 4 H30* 5 Bu N*F THF O The following scheme: 1. Mg. Et,O Br 2. 3. H3O* O The following scheme: 1 BrMg 2 H;0 astime
- Which of the Allwing Paren thesis) has the highest molor heat Cupacity a) Glyeine (97A) 6) Alanıne (121 A) f Leucine (1AI A) Phunylalanıne (228 n") S Tryptophan (204 A) Omino aud residues (accessible surfaa area in In water?What i the MAJOR praduct of the reaction below? Ch H3C- - NHČCH3 FeCl - NHČCH; H3C- H3C- - NHČCH; © H;C- - NHČCH, O H3C- - NHCH;The followmg reacthon was studied at 25 C in henzene solution containing 0.1 M pyridine. CH.OH + (CH.),CCI CH,OC(C,H), IICI The following setx of data were observed Inihal concentiation AL, min Final C), M [B, M 0.05 IC M 0.0000 0.10 25 0.0033 0.0039 0.0077 0.10 0.10 15.0 0 10 0.20 O Whut ratc law is consistent with the above dau undhat ix the hest avernge valuc fo the rate constani, expressed in seconds and molur conceniration units? 0.0000 7.5 Ansuer: O Roode law: k[AJ[B] O Averoge value rade Constant -3. -1 =4.335X10 M's"
- 1:39 17. Provide the major organic product of the reaction shown. Ph O 1. Et-MgBr (xs) 2. H₂O+ Actual S Sen cel5. The safonification of ethyl acetate in sodium hydroxide solution at 30^oC СНЗСООС2H5 + NaOH СНЗСОONa + С2H5ОН was studied by Smith and Lorenson (J. Am Chem. Soc.,61 (1939), 117). The initial concentration of ester alkali were both 0.05 mol.dm^-3, and the decrease in ester concentration x was measured at the following times. x 10^-3/mol dm^-3 5.91 11.42 16.30 22.07 27.17 31.47 36.44 Time/ min 4 15 24 37 53 83 Calculate the rate constant for the reaction. (Avery, 18)What series of reagents could be used to carry out the conversion shown? ČI O Cl2/FeCls; CH3CI/AICI3; excess Cl2, heat O CH3CI/AICI3; Cl2/FeClg; excess Cl2, heat O excess Cl/FeCl3; H30*; CH3CI/AICI3 O Excess Cl;: CH,CI/AICI3 O C2/FeBr3; CH3CI/AICI3; H30*, heat