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- Reaction of -pinene with borane followed by treatment of the resulting trialkylborane with alkaline hydrogen peroxide gives the following alcohol. Of the four possible cis,trans isomers, one is formed in over 85% yield. (a) Draw structural formulas for the four possible cis,trans isomers of the bicyclic alcohol. (b) Which is the structure of the isomer formed in 85% yield? How do you account for its formation? Create a model to help you make this prediction.Elimination of HBr from 2-bromobutane affords a mixture of 1-butene and 2-butene. With sodium ethoxide as base, 2-butene constitutes 81% of the alkene products, but with potassium tert-butoxide, 2-butene constitutes only 67% of the alkene products. Offer an explanation for this difference.The product formed as a result of the reaction between cyclohexanone and 3-butene-2-one write down the product and mechanism of the reaction.
- This is the general mechanism of nucleophilic addition of aldehydes and ketones. Nu: Nu- H-Nu Nu-Ċ-0-H + Nu: Represent the mechanism with the energy diagram showing the transition states and the intermediate.Consider the monosubstituted benzene reagent X. Nitration of X yields product Y. Product Y is analysed by 1H and 13C NMR spectroscopy (see Figures 1 to 4). Determine the structure of X and Y on the basis of the spectral data provided.Write the etherification reactions of isopropyl bromide and 2-bromo-1-nitropropane with phenol . Which reaction takes place faster and why?
- X Upon ozonolysis, Compound X produces two compounds: Compound Y and Compound Z. Compound Y can also be prepared from the following synthetic route: PCC 1. R₂BH, THF 1. Mg. Et₂O PCC Compound Y 2. CH₂Cl₂ 2. NaOH, HO CH₂Cl₂ 3. H₂O* From this information, draw the structures of Compounds X, Y, and Z. For Compounds X and Z, different substituents are possible. For grading purposes, just use hydrogens as the substituents. Br مرد →] ►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* →→Dehydrohalogenation of alkyl halides lead to the formation of more than one product. Using 3-methyl-3-butyl chloride, explain the observation.
- Predict-the-Product. Draw the structure(s) of the major organic product(s) formed in the following reactions. Please indicate stereochemistry if appropriateIllustrate the reaction mechanism for the ethylation of p-cyclopropyllphenol (other reactants: AlCl3 and ethylchloride). Refer to Friedel-Craft Alkylation mechanism as your guide in doing this mechanism. Show ALL partial charges in the EACH structure using BLUE color. Arrows should be written using RED color.S.10. Describe the product formed as a result of the reaction between cyclohexanone and 3-butene-2-one by also writing down the mechanism of the reaction.