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- 7. Roadmap. Complete the following roadmap synthesis by providing all the missing reagents. If more than one step is required, be sure to indicate so with sequential steps. No sequence should be more than 3 steps.16. When cis-1,2-cyclopentanediol reacts with acetone in dry HCl, compound M is formed. What do you expect the hydrolysis of compound M to be when subjected (i) to base; and, (ii) acid A. resistant to base; resistant to acid B. resistant to base; readily hydrolyzed by acid C. readily hydrolyzed by base; resistant to acid D. readily hydrolyzed by base; readily hydorlyzed by acidIdentify the reagents you would use to achieve of the following transformation. Identify these reactions as SN1 or Sn2. (a) (b) (c) (d)
- 1a). Predict the major product obtained in the following reaction: B). Write out the 3-step arrow pushing mechanism leading up this product.16. When cis-1,2-cyclopentanediol reacts with acetone in dry HCl, compound M is formed. What do you expect the hydrolysis of compound M to be when subjected (i) to base; and, (ii) acid a. resistant to base; resistant to acid b. resistant to base; readily hydrolyzed by acid c. readily hydrolyzed by base; resistant to acid d. readily hydrolyzed by base; readily hydorlyzed by acid 17. Following (16), would you expect that a similar compound be formed if the reactant was trans-1,2-cyclopentanediol? Why is this so? a. Yes; hydroxyl groups are on opposite side b. No; hydroxyl groups are on opposite site c. Yes; hydroxyl groups are on the same side d. No; hydroxyl groups are on the same sidePredict the expected product for each reaction and provide IUPAC name for the correct starting material to yield the desired epoxide: 1. Name of compound 2. Answer A, B, C, or D
- Treatment of W with CH3Li, followed by CH3I, affords compound Y (C7H14O) as the major product. Y shows a strong absorption in its IR spectrum at 1713 cm−1, and its 1H NMR spectrum is given below, (a) Propose a structure for Y. (b) Draw a stepwise mechanism for the conversion of W to Y.Explain briefly by illustrations the chemistry behind each answer 1. Preamble :A reaction flask contains a 2-bromopentane in an ethanolic solution of sodium ethoxide at room temperature and results in the formation of two olefinic products(1-pentene and 2-pentene) I) What reaction pathway is followed by the reaction above?A. E2 dehydrohalogenation B. E1 dehydrohalogenationC. SN1 dehydrohalogenationD. SN2 dehydrohalogenationE. A mixture of E1 and E2 pathways II) What is responsible for the formation of different products (major and minor).A. The different activated complex involved in the mechanism.B.Bimolecular Nucleophilic substitution reaction C.Bimolecular Elimination reaction D.The presence of sodium ethoxideE.The hybridisation nature of the secondary carbocation III) All the following is true about the reaction in question 1 except?A. The reaction follows Zaistev’s ruleB. Sodium ethoxide is the nucleophile in this reactionC. The more highly substituted alkene is the most stable…8.b）Provide mechanisms for the following reactions:
- Predict the most stable product for the following reaction sequence: 1. A 2. B 3. C 4. D 5. EPredict the product C of the following reaction below and briefly explain youranswer.[PtCl3(C2H4)]¯ + NH3 → C1. What effect would you expect on the rate of reaction of ethanol with 2-iodo-2-methyl-butane if the concentration of the halide is tripled? 2. Explain the difference between addition, elimination and substitutionreactions. 3. Optically active 2-butanol slowly racemizes on standing in dilute sulfuricacid. Propose a mechanism to account for this observation.
