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![U O P 1::YE
chemistry-academy.com 6
- All of the following react by
addition except. .
(a) C2H2
(b) CоН12 (Асyclic)
(С) CоН12 (Суclic)
(d) C3H4
a
b
C
d
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- 6. Complete reaction scheme below indicating reagents, catalysts and conditions, and side product trigil bezinslog si6101fon 290b 1l (b Senines levirba 6 gaubong nasamots gniwollot ads to doinW 01 sniowl (6 CH3 40 CH3 Scansgowi (d Ege nodie) ( nsgyxo (b NO₂ 19m02 2i gniwollet sits to mainW II HOWhat is the organic product formed in the following sequence of reactions? Br (1) Mg/ether, (2) CO₂ HOCH₂/H* (1) DIBAL-H, toluene, -78°C heat (2) H*(aq) (3) H*(aq) II H III IV de "a H H I ?(4) d F3C H (5) + CH3OH Harin HO. (6) OH Br₂C+0 cyclizes -OCH3 CH3OH - H₂O HCI catalyst
- 6. For each reaction indicate the predominant mechanism: S,1, S,2, E1, or E2. (a) (b) (c) OH H* H* H* ? ? ? A. A OH OH (d) Br (e) .CI NaBr CH,OH DMSO dilute (CH),COK (9) OTs ? OTs (CH),COH Ethanol(a) Br2 FeBr3 (b) NaCN CI (c) HO H,SO, 180 °C Major product (d) 1) LİAIH, H2N- 2) H,O* (e) SOCI, Но10. What is the major organic product generated in the reaction below? HO HO 40||!!!!!! (A) OH ...... (B) 1) 03 2) (CH3)2S HO O (C) H НО. (D)
- In each reaction box, place the best reagent and conditions from the list provided. 1) Br 2) 3) DEET (the active ingredient in over the counter insect repellant) 4) 5) Answer Bank Mg. Et,0 CH,CH,OH НСООСH, H,CO НСООН NH(CH,CH,),(2 equiv.) Br,, FeBrz CH,COOH HN(CH,CH,), (1 equiv.) NaNH, H,0+ CH,CH,NH, CO, CH,CH, Br SOC, NaCNGive the structure of compound A, the major product when the reaction is conducted at low temperatures. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default. View Available Hint(s) H 20 EXP. CONT. L C N S CI -55 °C Br Marvin JS Н — Вr [1] A by O ChemAxon F A OQ2- Which one of the following reaction is unreasonabl? A) NaOH(aq)+HCl(aq)-NaCla+H₂O B) H2(g)+1/202)→ H₂Op AHneutralization=-851.5kJ/mol =-283.5kJ/mol AHormation C) CH3COOH + H₂O-CH:COO(g) + H AHassociation = +213.5kJ/mol D) Mg(+2HCl → MgCha) + H₂ - AHformation =+315.5kJ/mol Q3- If A 25.0 mL of diluted bleach solution has required 30 mL of 0.30 M Na S,O; to reach the endpoint of the titration. Calculate the mass percent of NaCIO in the original sample (Molar mass NaCIO = 74.5 g/mol). Assume the density of bleach solution is 1.084g/mL and the dilution factor is 10. B) 9.96% C) 0.996% D) 12.4% A) 19.92% and the colo
- 4. Protonation of alcohol A and subsequent loss of water, produces the intermediate B. CH3 CH; CH, CH, — с — сH, CH, CH;CH, - C- CH, CH; | OH A B (a) (i) Name alcohol A. (11) What type of species is intermediate B? (iii) Draw the structures of the two alkenes which can be formed from species B by removal of a proton. Label as C the alkene which shows geometrical isomerism. (b) The intermediate B is readily attacked by nucleophiles such as water. What is the essential feature of a nucleophile? (c) State what final colour you would see if alcohol A were warmed with acidified potassium dichromate(VI). Explain your answer. Colour Explanation . (ii) Draw two structural isomers of alcohol A which form branched chain ketones when heated with acidified potassium dichromate(VI), but which could not form alkene C on dehydration.Draw the structure of the expected major organic product for each of the following five (5) questions. Specify stereochemistry clearly, if relevant. A. CH3 excess Na NH3 (1) H3C-C=C- -CH3 H, cat. Ni,B H3C-C=C С. PB33 H3C° HO, CH D. PhS Na product from reaction 1C Е. OH CH3 H;PO4 ""CH3 B.Please help with 4c, 4d, and 4e. We havent learned kaw of equivalents so please do 4c a different way. thank you
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