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- 1. Do propose a complete substitution mechanism of the following reactions, by looking at the given conditions determine whether it is unimolecular or bimolecular and pay attention to stereochemistry; (i) (1-bromoethyl) cyclopentane reacted with ethanol and then dimethylformamide, (ii) 2-chloro-1-cyclopropylbutane reacted with propanol.When (CH3CH2)3CBr is added to CH3OH at room temperature, the product is (CH3O)C(CH2CH3)3. Propose a mechanism(s) for the reactions leading to these products and used curved arrows to show the movement of electrons.Treatment of an , -unsaturated ketone with basic aqueous hydrogen peroxide yields an epoxy ketone. The reaction is specific to unsaturated ketones; isolated alkene double bonds do not react. Propose a mechanism.
- Treatment of a cyclic ketone with diazomethane is a method for accomplishing a ring-expansion reaction. For example, treatment of cyclohexanone with diazomethane yields cycloheptanone. Propose a mechanism.Cyclohexene plus 1) Hg(OAc)2, H2O; 2) NaBH4; yields __________. HO2CCH2CH2CH2CH2CO2H a cyclic diketone cyclohexyne cyclohexanol OHCCH2CH2CH2CH2CHOQ2 Propose mechanisms for the following reactions. (a) (b) (c) (d) (e) Br HBr ROOR hv cat. H₂SO4 H₂O HBr > HCI EtOH cat. H₂SO4 H₂O Br OH Br xBr+ Br CI CH₂CH3 OH H H -OH Br CH₂CH3
- Oxidation of cholesterol converts the alcohol to a ketone. Under acidic or basic oxidationconditions, the C“C double bond migrates to the more stable, conjugated position. BeforeIR and NMR spectroscopy, chemists watched the UV spectrum of the reaction mixture tofollow the oxidation. Describe how the UV spectrum of the conjugated product, cholest-4-en-3-one, differs from that of cholesterolChoose the set of letters corresponding to the BEST answer. -has four equivalent acidic hydrogens -gives an iodoform upon reaction with I2/KI in NaOH -a non-enolizable carbonyl compound -yields 2-methylbutane when reacted with Zn(Hg) in HClThe Favorskiireaction involves treatment of an a-bromo ketone with base to yield a ring-contracted product. For example, reaction of 2-bromocyclohexanone with aqueous NaOH yields cyclopentanecarboxylic acid.what is the mechanism of the reaction.
- 5. Predict the product and show the mechanism of the following reaction:(Write out complete equations showing the structure of all reactants and products.) 2-methoxyheptane + Excess conc HBr/heat ----->What products would ypu obtain from reaction of 2,4-dimethyl-2-pentene with BH3, followed by H2O2, OH-? Show its complete reaction mechanism.Thank you for the answer, would it be possible to follow the path I have attached as well srarting from methanol ---> CH3Br -----> CH3MgBr-------> (H3C)CH-CH2OH ----> E1 Isobutalene