(b). Organic reactions can be classified according to the type of functional groups involved in the reaction. Predict the structure of the product(s) formed in each of the following reaction.
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Kindly answer this question iii & iv
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- 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.(a) Answer the following questions based on the reaction scheme below. Jawab soalan berikut berdasarkan rajah tindak balas di bawah. H,SO, 180°C R OH+ Δ U NH, (i) State reagent Q. Nyatakan reagen Q. (ii) Draw the structural formula for compounds R, T, U and W. Lukiskan formula struktur bagi sebatian R, T, U dan W. PCI,3. (a) Complete the following reactions and write the name of products (i) 1. HNO3, H2SO4 AICI3 2. Zn(Hg), HCI (ii) 1. HBr 2. NaOCH3 3 (iii) ??? H2N-NHCON2 Aq. KOH C6H5CH2OH → BENZALDEHYDE A В (b)What happens when (write reactions involved) (iv) Phenol reacts with sodium metal and resulting product reacts with 2-chloropropane (v) Ethanal reacts with HBr and the resulting product is dehydrated (vi) Ethoxyethane is hydrolyzed to produce a compound A which dehydration produces B. B on ozonolysis produces C. Write the reaction and identify A, B, and C.
- 1. The following synthetic schemes all have at least one flaw in them. What is wrong with each? (a) Br CO2H CH3CH2CHCH2CH3 1. Mg CH3CH2CHCH,CH3 2. NaCN 3. H30* (b) .CH2CO2H „CH2CH3 1. LIAIH 2. H30* (c) он он CH3CCH2CH2CI 1. 1. NaCN 2. H30* CH3CCH2CH2COH CH3 CH3(b) Predict the suitable solvent (H2O or CH3COCH:) to increase the reaction of bromopropane (CH3CH2CH2B1) with sodium hydroxide (NaOH). Two reactions are shown below: NaOH, 55 °C CH;CH,CH,Br CH;CH,CH,OH + + NaBr H,O (i) NaOH, 55 °C CH;CH,CH,Br CH;CH,CH,OH + NaBr (ii) H,C- CH3What is the major Organic product of the following reaction? (d) O ZEU OH CH₂N₂ CH; (b) (e) NH₂ NH₂ C (0) OCH, CH;
- Under strongly acidic conditions, hexane is observed to undergo an isomerization process, during which it is converted into branched alkanes having the same molecular formula as hexane (C6H₁4). The rate at which each constitutional isomer is produced is related to the type of acid that is used in the reaction and the degree of mixing that occurs during the reaction (J. Chem. Soc., Perkins Trans. 2 1999, 12, 2715-2718). Step 1 Draw a bond-line structure of hexane. Draw Your Solution There are four branched isomers of hexane. Draw bond-line structures of all four of its isomers. Draw Your Solution(b) Describe the hazards of (i) trioxygen: (ii) hydroxide ion; (ii) hydrogen sulfide. (c) Explain why an aqueous solution of sodium sulfide has an odor of hydrogen sulfide. (d) (11) Reduction of H,CCHCHO with NABH4 gives a product different from that of catalytic hydrogenation (H2 /Ni). What are the products?Identify (A) in the following reaction. 2H2 Pt (A) KMNO4 Warm conc. || С — С — о—н |CO,H + HO CO2H cis-cyclo hexane 1,2-dicarboxylic acid (a) (b) (c) (d)
- (a) Tsomane and Nyiko were given a task of synthesising methylenecyclohexane 2. After a brief discussion with each other, Tsomane proposed Method A to synthesise 2 from cyclohexanone 1 while Nyiko proposed Method B that started from hydroxymethylcyclohexane 3. Each student believed that their proposed method is better than the other. (Scheme below) (1) Ph Ph 8*8 Ph THF A 1 Santande B H₂SO4 100 °C 3 OH Using curly arrows, provide full mechanistic details accounting how methylenecyclohexane 2 was synthesised according to both Methods A and B.1. One version of canola oil is (C15H29CO2)3C3H5. (a) Write the transesterification chemical equation (similar to Eq. 12-7) for canola oil. (b) How much canola oil will be required to produce one ton of biodiesel? 2. Write the chemical reaction equations for hexene (C6H12), butanol (C4H9OH), and heptane (C7H₁6) for the Fischer-Tropsch synthesis process. If appropriate, the value of "n" must be used in a chemical equation.(b) Complete the following reactions : (i) D H3C CH3 H H كما .NO2 B | Bra/Dioxane .COCH3 A