(a) Name each compound. (b). If a mixture of these compounds was fractionally distilled, give the order in which they would distil off, starting with the top of the fractionating column. Explain your answer.
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- Explain briefly and clearly the following concepts, taking as reference the molecule of n-butane and the corresponding drawings or illustrations. See pages 149-152 of the book Organic Chemistry, sixth edition (J. G. Smith). 4. What is steric hindrance in a conformation? Then draw a picture to illustrate the concept? 5. What is the torsional stress of a conformation? Then draw a picture to illustrate the concept? 6. Describe 1,3-diaxial interaction and illustrate with a specific example.An unknown hydrocarbon A with the formula C6H12 reacts with 1 molar equivalent of H2 over a palladium catalyst to give hydrocarbon B. Hydrocarbon A also reacts with OsO4 to give the glycol C. When oxidized with KMnO4 in acidic solution, A gives two fragments. One fragment is propanoic acid, CH3CH2COOH, and the other fragment is ketone D (R2C=O). What are the structures of A, B, C and D? Write all reactions.Aspirin, or 2-acetoxybenzoic acid, (C9H8O4) is often synthesised from salicylic acid.(i) Sketch and discuss any changes in the number of possible structural conformations ofaspirin relative to those of salicylic acid. (ii) Re-draw the structure predicted to be the lowest energy conformation of aspirin,indicating any expected stabilising and destabilising interactions. Justify your choice.
- Which of the following in each pair is likely to be moresoluble in hexane, C6H14: (a) CCl4 or CaCl2, (b) benzene(C6H6) or glycerol, CH2(OH)CH(OH)CH2OH, (c) octanoicacid, CH3CH2CH2CH2CH2CH2CH2COOH, or acetic acid,CH3COOH? Explain your answer in each case.Given that naphthalene is insoluble in water and sublimes easily upon heating, describe two methods by which you could separate naphthalene and NaCL.An unknown hydrocarbon A with the formula C6H12 reacts with 1 molar equivalent of H2 over a palladium catalyst. Hydrocarbon A also reacts with OsO4 to give diol B. When oxidized with KMnO4 in acidic solution, A gives two fragments. One fragment is propanoic acid, CH3CH2CO2H, and the other fragment is ketone C. What are the structures of A, B, and C? Write all reactions, and show your reasoning.
- A compound with the formula C5H6 takes up 2 moles of H2 on catalytic hydrogenation. Give one possible structure that would fit the information given.Chemistry For propene and 2-methylbutene-2, write the reaction schemes for the electrophilic additions: a) with hydrogen bromide; b) hydration; c) hydrogenation; G) oxidation of KMnO4 under mild and harsh conditions. Name the reaction products4. Compound A has the formula C 8H 8. It reacts rapidly with KMnO 4 to give CO 2 and a carboxylic acid, B (C 7H 6O 2), but reacts with only 1 molar equivalent of H 2 on catalytic hydrogenation over a palladium catalyst. On hydrogenation under conditions that reduce aromatic rings, 4, equivalents of H 2 are taken up and hydrocarbon C (C 8H 16) is produced. What are the structures of A, B, and C.
- There are three constitutional isomers with the molecular formula C5H12. When treated with chlorine at 300°C, isomer A gives a mixture of four monochlorination products. Under the same conditions, isomer B gives a mixture of three monochlorination products and isomer C gives only one monochlorination product. From this information, assign structural formulas to isomers A, B, and C.On being heated with a solution of sodium ethoxide in ethanol, compound A (C7H15Br) yielded a mixture of two alkenes B and C, each having the molecular formula C7H14. Catalytic hydrogenation of the major isomer B or the minor isomer C gave only 3-ethylpentane. Suggest structures for compounds A, B, and C consistent with these observations.Upon successful bromination of an alkene, what is the molecular weight increase of the compound? The number commonly associated with petroleum products. Often mentioned on refueling stations. The difference in molecular weights of chloropropane and 2-chloropropane When a haloalkane is heated with alcoholic solution of potassium hydroxide, what will be the result? What does Kerosene tends to contain these organic compounds? Wet Filter paper containing iodoform weighs 2.1 grams. Upon drying only 0.6 grams of iodoform is left. Assuming 1 gram of moisture is removed, what is the weight of the filter paper?