What stereoisomers are obtained from the reaction of each of the following alkenes with OsO4 followed by aqueous H2O2? a. trans-2-butene b. cis-2-butene c. cis-2-pentene d. trans-2-pentene
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What stereoisomers are obtained from the reaction of each of the following
a. trans-2-butene b. cis-2-butene c. cis-2-pentene
d. trans-2-pentene
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- Ignoring stereochemistry, draw the alkylborane formed from the addition of one equivalent of BH3 to the alkene. The alkylborane formed in Part 1 is further treated with H2O2 and HO−. Draw the two stereoisomers of the final product of the reaction. Include stereochemistry where relevant. How many stereocenters are formed from the reaction? What is the relationship between the stereoisomers?Draw the product or products that will be obtained from the reaction of cis-2-butene and trans-2-butene with each of the following reagents. If a product can exist as stereoisomers, show which stereoisomers are formed. 1. HCl. 4.Br2 in CH2Cl2 7. H2O + H2SO4 2. BH3/THF, followed by HO-, H2O2, H2O 5. Br2 + H2O 8. CH3OH + H2SO4 3. a peroxyacid 6. H2 + Pd/CWhich reaction intermediate is formed when 4-methylcyclohexene reacts with Br2 dissolved in CCl4
- A haloalkane reacts with a strong base to yield only one alkene product. Select the possible structures that can give this result from Figure 9. * A B C DConsider a reaction where cis-but-2-ene is treated with a peroxy acid followed by OH- /H20. Draw the structure of one product that is formed in the reaction, including correct stereochemistry.Draw the major products obtained from the reaction of one equivalent of HCl with the following compounds. For each reaction, indicate the kinetic andthermodynamic products. a. 2,3-dimethyl-1,3-pentadiene b. 2,4-dimethyl-1,3-pentadiene
- A chemist allows some pure (2S,3R)-3-bromo-2,3-diphenylpentane to react with a solution of sodium ethoxide(NaOCH2CH3) in ethanol. The products are two alkenes: A (cis-trans mixture) and B, a single pure isomer. Under thesame conditions, the reaction of (2S,3S)-3-bromo-2,3-diphenylpentane gives two alkenes, A (cis-trans mixture) and C.Upon catalytic hydrogenation, all three of these alkenes (A, B, and C) give 2,3-diphenylpentane. Determine the structuresof A, B, and C; give equations for their formation; and explain the stereospecificity of these reactionsWhat reagents would you use to prepare the next alkeneConsider a reaction where cis-but-2-ene is treated with OsO4 followed by NaHSO3/H2O. Draw the structure of one product that is formed in the reaction, including correct stereochemistry.
- a. Identify two alkenes that react with HBr to form 1-bromo-1-methylcyclohexane without undergoing a carbocation rearrangement. b. Would both alkenes form the same alkyl halide if DBr were used instead of HBr? (D is an isotope of H, so D+ reacts like H+.)1. Using Br2 in C2H4Br2 will result in HBr and ______. a. C2H3Cl3 b. C2H4Cl3 c. C2H2Cl3 d. none of the above 2. How many halogenation are posible in propane? a. 3 b. 8 c. 6 d. 10 3.Sulfonation of pentane will result in ________ and water. a. C5H11SO3H b. C5H12SO3H c. C5H14SO3H d. none of the above 4.Nitration of hexane will result in ________ and water. a. C6H13SO3H b. C6H15NO2 c. C6H13NO2 d. C6H14NO2 5.How many moles of O2 in heating a C12H26 (dodecane) a. 27 b. 37 c. 24 d. none of the above1.Label kinetic product 2.Label the thermodynamic product 3.Predict the four products from reaction of alkene with one equivalent HBr