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- Which of the following best describes a key step in the mechanism for the reaction below? HO, ... -CH3 -CH3 + en dihydroxylation H3C- H3C- OH (A) free-radical substitution at the carbonyl carbon B elimination reaction by abstraction of a beta-hydrogen nucleophilic attack by an alkene to form a cyclic (epoxide) intermediate electrophilic addition reaction to form a carbocation intermediate2. Isomerization of alkenes can be achieved through conjugate addition of nucleophiles. Examine the reaction below and answer the questions that follow: i) ii) iv) bigg Starting Alkene Alkene Product Give the chemical structure of the Alkene Product that is formed (NB: Show and label the geometry of the Alkene Product). Explain why geometry given in i) above is preferred. What is likely to be the geometry of the Starting Alkene? Give the full mechanism through which the isomerization is likely to occur.[References] Compound A reacts with 1 molar equivalent(s) of hydrogen on catalytic hydrogenation. A undergoes reaction with ozone, followed by Zn treatment, to give: Compound A CH3CCH3 Propose a structure for A. • You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. In cases where there is more than one answer, just draw one. P. C opy aste C - ChemDoodle Previous Cengage Learning Cengage Technical Support
- 12:53 ul 4G O 2. Show a reaction scheme with all the reactants and reagents of the nitration reaction of bromobenzene and show the major products(s), with valid reasons motivate why the positioning of the two constituents' favour ortho, para and/or meta positioning Add a caption... > Status (Custom) +2. Isomerization of alkenes can be achieved through conjugate addition of nucleophiles. Examine the reaction below and answer the questions that follow: i) ii) iv) blogg Starting Alkene Alkene Product Give the chemical structure of the Alkene Product that is formed (NB: Show and label the geometry of the Alkene Product). Explain why geometry given in i) above is preferred. What is likely to be the geometry of the Starting Alkene? Give the full mechanism through which the isomerization is likely to occur.An organic chemistry student reacted benzene (excess) with a racemic mixture of (S) and (R) enantiomers of 2-chloro-3,3-dimethylbutane in the presence of AICI3 followed by water. Which of the following represents at least 50% of the final product profile? [Note: more than one answer may or may not apply.] ok of d b a ok *** CI f
- Heterocyclic compounds plays an important role in our daily life. They are mainly used in pharmaceutical and agrochemical products to name a few. 3. It is required to introduce a halogen group to a five membered ring, thiophene. Discuss the reaction mechanism involved in the reaction by selecting a suitable halogen group and analyze why a particular substituted product obtained after the reaction is predominant over the other possible product(s) with the help of reactions.provide the vond line structure of the organic product obtained following the reactions and for each step of the given reaction scheme.13. (18 pts) Spiropentane, shown on the left, reacts with Cl2 in the presence of light to furnish the two products shown on the right. Given that Cl2 is readily cleaved by light, provide a detailed step-by-step mechanism for the formation of the two products from the common intermediate shown in brackets, and also show the mechanism for the formation of the common intermediate from spiropentane. Use curved arrows to detail electron flow. Cl Cl2 Cl Cl hv Cl Cl
- NH₂ NHỊCH, tipy (a) acrylamide Diamines are used as the building blocks for the synthesis of pharmaceuticals and agrochemicals. In the above synthesis, draw the structure of the product (b). ChemDoodle 1. LIAIH 2. H₂O • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Include cationic counter-ions, e.g., Na* in your answer, but draw them in their own sketcher. OF (b) 6Consider the molecule 3-hexyne, shown helow tf vou partially hydrogenated the molecule (1.e. generated nn alkene, rather than an alkane) and then treated the tina alken clemental bromine, illustrate the results if you hydrogenated over the Lindlar catalyst compared to hydrogenation via lithium or sodium in ammonia. CHgCH2C=CCH2CH3 Alkynes can be directly reacted with elemental bromine as well. Assuming that you could control this process to limit it to a single addition (i.e. generate an alkene), what would happen if you reacted first with bromine and then hydrogenated the result? Explain in the context of your answer above.2. Provide all the possible products in the following reaction. 3. Provide the products of the following Diels-Alder reactions, with the correct stereochemistry. Show the endo structure where applicable. e HBr H
