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- What starting alkene reacted with I2 in a solution of CH2Cl2 is required to produce 1,2-diiodoocyclopentane?Fill in the following missing organic structures. Consider stereochemistry (R/S and/or E/Z –cis/trans) and possible carbocation rearrangements.What are the major products(s) formed by treating 1,2-dimethyl cyclopentene with Br2?
- A chemist allows some pure (2S,3R)-3-bromo-2,3-diphenylpentane to react with a solution of sodium ethoxide(NaOCH2 CH3) in ethanol. The products are two alkenes: A (cis-trans mixture) and B, a single pure isomer. Under the same 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 structures of A, B, and C; give equations for their formation; and explain the stereospecificity of these reactions.Consider a reaction where cis-but-2-ene is treated with sO followed by NaHSO/H, O. Draw the structure of one product that is formed in the reaction, including correct stereochemistry.What are the reagents used to convert 2-butyne to C4H8? What are the products when that C4H8 is mixed with OsO4, and H2O (the formula will be C4H10O2 racemic)? What is the product when C4H8 is mixed with RCO3H, and H2O (the formula will be C4H10O2 meso)?
- Draw the products formed when both cis- and trans-but-2-ene are treated with OsO4, followed by hydrolysis with NaHSO3 + H2O. Explain how these reactions illustrate that syn dihydroxylation is stereospecic.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 reactionsWhich of the following is the product of the reaction shown in Image 17? a. (C6H5)3COH b.C6H5CH2OH c.(C6H5)3CH d.(C6H5)2CHOH
- Draw the products formed when both cis- and trans-but-2-ene are treated with OsO4, followed by hydrolysis with NaHSO3 + H2O. Explain how these reactions illustrate that syn dihydroxylation is stereospecific.Draw all of the substitution and elimination products formed from the given alkyl halide with each reagent: (a) CH3OH; (b) KOH. Indicate the stereochemistry around the stereogenic centers present in the products, as well as the mechanism by which each product is formed.Name the alkene below.Use ONLY E/Z designators to indicate stereochemistry.H2C=C=CHCH3