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- Wittig reactions with the following -chloroethers can be used for the synthesis of aldehydes and ketones. (a) Draw the structure of the triphenylphosphonium salt and Wittig reagent formed from each chloroether. (b) Draw the structural formula of the product formed by treating each Wittig reagent with cyclopentanone. Note that the functional group is an enol ether or, alternatively, a vinyl ether. (c) Draw the structural formula of the product formed on acid-catalyzed hydrolysis of each enol ether from part (b).Q2) Write a reaction for the following, with explanation. part 1) Dimethyl ketone with Hydrogen cyanide (HCN) part2) Preparation of M. nitro chlorobenzene from benzene, using nitric acid Sulfuric acid, Chlorine, AICI, and any reagent you need. part3) Solvation of ethylene epoxide in acidic medium7. What is the theoretical explanation for the acidic character of terminal alkynes? 8. Give a simple chemical test that can differentiate the two compounds from each other. Specify the reagent(s) needed and state what you expect to see. a) benzene and ethylbenzene b) 1 – butyne and 2 – butyne c) 2 – methylpentane and 2 - methylcyclohexene
- Instructions: Choose from the options A-E and explain briefly by illuillustrat the chemistry behind each answer. 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. All the following is true about the reaction except? A. The reaction follows Zaistev’s rule B. Sodium ethoxide is the nucleophile in this reaction C. The more highly substituted alkene is the most stable product D. Dehydrohalogenation reaction of the alkyl halide is an elimination reaction E. The starting material (reactant) is a secondary alkyl halide 2. All the following parameters would affect the rate and kinetics of the reaction except A. Solvent medium B. Reaction temperature C. Reaction time D. Geometry and structure of the alkyl halide E. pH 3. What would be the major product when 2-iodopentane is involved in a dehydrohalogenation reaction? A. 2-iodo-1-pentene B.…1. Write the formation reactions that form Grignard reagents from a) 1-brompetane, magnesium metal, in diethyl ether, b) p-bromotoluene, magnesium metal, in diethyl ether, c) iodomethane, magnesium metal, in tetrahydreofuran.14)Synthesize the molecule below from reagent and inorganic precursors. H₂C-0 H₂C .CH3 CH3 H₂C A O CH3 CH3 , methanol, an appropriate Grignard
- 10. MM and NN are amines with molecular formula, C3H9N. Reaction of MM with sodium nitrite and HCl releases nitrogen gas and produces a mixture of XX and YY, while NN produces yellowish oily compound ZZ when reacts with the same reagent. Gives the structures of MM, NN, XX, YY and ZZ. Outline a synthesis of MM from a suitable alkene.4. Write in the product, including stereochemistry where relevant, for these reactions. a) b) cyclohexene 1-pentene 1. Os04 2. NaHSO3 1. 03 2. Zn, H* →→Provide the major organic product of the following reaction. 1. Т.С, ругidine 2. NaBr
- Possible alternative brominations include: Veratrole (1,2-dimethoxybenzene) to 1,2-dibromo-4,5-dimethoxybenzene; 4-Methylacetanilide to 2-bromo-4-methylacetanilide; 2-Methylacetanilide (made in experiment S.1) to 4-bromo-2-methylacetanilide; Vanillin to 5-bromovanillin; Acetanilide to 4-bromoacetanilide; a. b. C. d. e. EXPERIMENT S4: BROMINATION OF AROMATIC COMPOUNDS Certain other acetanilides made in experiment S.1 may also be used as precursors in this experiment. Estimated time: 1 afternoon Associated learning goals: Section 6, LG 6.6; Section 7, LG 7.2 and 7.4 Pre-lab report: complete the standard report form, and answer the following questions. In this experiment, molecular bromine (Br2) is generated from the redox reaction of potassium bromate with hydrobromic acid. Write a balanced equation for this process. Briefly outline the mechanism by which Br2 brominates your aromatic compound. Why do the bromine atoms end up at the positions indicated rather than anywhere else in the…INSTRUCTIONS: Choose from the options A-E and 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. i. All the following parameters would affect the rate and kinetics of the reaction except A. Solvent medium B. Reaction temperature C. Reaction time D. Geometry and structure of the alkyl halide E. pH ii. What would be the major product when 2-iodopentane is involved in a dehydrohalogenation reaction? A. 2-iodo-1-pentene B. 2-pentene C. (E)-2-pentene D. (Z)-2-pentene E. Cis-2-pentene Preamble: A student chemist in an attempt to synthesise compound B from the aromatic aldehyde. iii. Predict the chemical name of compound B A. p-chlorobenzylamine B. 4-bromoaniline C. benzylamine D. p-chloronitrile E. p-chlorobenzaldehyde iv. What is the reaction name for the chemical transformation of A to B A.…II. From cyclohexane and toluene as a carbon base, synthesize : 3-(3-cyclohexenyl)benzoic acid