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- H3C CH3 H3C NA C→XT Br Br₂ CH₂Cl₂ H3C Electrophilic addition of bromine, Br₂, to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH₂Cl₂. CH3 Br In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions Br CH3 H3C CH3The rate of hydration of 2-butene and 2-methylpropene differ by several orders of magnitude. Whcih alkene is more rapidly hydrated and why?CH3 CH3 Br- Br2 .CH3 CH2Cl2 CH3 H3C H3C Br Electrophilic addition of bromine, Brɔ, to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH,Cl,. In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions CH3 CH3 CH3 CH3 H3C H3C :Br: :Br:
- Give IUPAC names for the following structures. When appropriate, abbreviate ortho (o), meta (m), and para (p), no italics, if you elect to use these terms. CH₂CH₂CHCHCHSCHCH₂ I T CH₁ CH₂ 1st structure: CH3 CH3 I 2nd structure: Submit Submit Answer Try Another Version OCH3 CH₂CCH₂ OCH3 10 item attempts remainingces to access important values if needed for this question. Complete the equation for the following reaction by drawing a structural formula for the missing organic product. CH3CH2NH2 H20 CH,CH,C-OH • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Draw cations and anions in separate sketchers. P. opy aste C. [F Visited CH4 M) M) M) ChemDoodle Submit Answer Retry Entire Group 5 more group attempts remainingAn important step in one synthesis of carboxylic acids is the deprotonation of diethyl malonate and its alkyl-substituted derivative: Base CH;CH2O OCH,CH3 CH;CH,0 OCH2CH3 H2 Diethyl malonate Base CH;CH,0 °C `OCH,CH3 CH;CH,O OCH,CH3 R Alkyl substituted diethyl malonate NaOH can deprotonate diethyl malonate effectively, but NaOC(CH3)3 is typically used to deprotonate the alkyl-substituted derivative. Explain why.
- 4. A student was asked to prepare an alkene X in high yield using any alcohol as starting material CH3 CH,-C -CH=CH, CH3 X He chose 3, 3-dimethylbutan-2-ol (XI) and carried out a dehydration reaction. He was however horrified to note that the only alkene obtained was XII. CH3 OH CH3 CH;-C=C-CH3 conc. H,SO4 CH-CH3 heat CH3 CH3 XI XII i) Explain what went wrong here, and why X could not be formed from 3, 3-dimethylbutan-2-ol. Use structures to help support your answer. ii) Give an equation to show a much better method for preparing X in high yield. 5. Analyze the following structure and write one combination for Grignard reagent and a carbonyl that would give rise to it. CH,-CH,-OHDraw an energy diagram for the addition of hydrobromic acid to pent-1-ene. Two products formin this reaction; draw the curves for both. Label the positions of the reactions, intermediates,and products. What is the name of the product that forms from the curve that has the higher-energy carbocation intermediate? What is the name of the product that forms from the curvethat has the higher-energy first transition state?The product of both the higher-energy carbocation intermediate and higher-energy first transitionstate is 1-bromopentane.Vhich of the following statements is incorrect? * 3 p Hammond-Leffler Postulate states that there is a strong resemblance between the transition state and the product in an endothermic reaction. Hammond-Leffler Postulate states that there is a strong resemblance between the transition state and the reactants in an exothermic reaction. The presence of more electron-donating alkyl groups ineffectively delocalize the positive charge in an organic molecule, making it less stable. The dehydration of primary alcohol proceeds via E2 mechanism. All of the abovę
- Questão 10A certain hydrocarbon had the molecular formula C16H26 and contained two triple bonds. Ozonolysis resulted in CH3(CH2)4CO2H and HO2CCH2CH2CO2H as the only products. What is the reasonable structure for this hydrocarbon? Hexadec-6,10-dino undec-1,5-dino Hept-1,5-dino hex-1,5-dino nahIndicate the products or reagents of the following transformationsCH3COOH + 2H2 = C2H5OH + H2O %3D Acetate Ethanol Acetate may be hydrogenated to ethanol in industrial reaction systems using several catalysts: Select the most effective catalyst for this reaction system if the free energy of the reaction is -34 kJ/mol; Catalist effective at the temperature range 37-45°C, O Catalist effective at the temperature range 40-55°C, O Catalist effective at the temperature range 60-72°C,