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Kk61.
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- What organic product is formed when 1‑methylcyclopentene is treated with NMMO in the presence of H2O and a catalytic amound of OsO4? Clearly show stereochemistry by drawing a wedge and dashed bond for each chiral carbon. Only draw one stereoisomer if more than one can be formed.Based on the more stable conformation (conformation A), need help providing two mechanisms for the E2 elimination of the protonated version of cis-1 using a general base (B:) to give alkenes 2 and 3. Clearly show which hydrogens meet the stereochemical requirements for E2-elimination Using Zaitsev’s rule, indicate which is favoured. Pictured is also a reaction mechanism to show what the alkenes 2 and 3 are. Thank you :)Q6. Draw resonating contributors’ structure of the following and indicate minor and major contributors:
- Which of the following alkene reactions occurs with a complete cleavage of the C=C ( breaking both pi and sigma bond components) ? Select one: A. Alkene + H2O2 with catalytic amount of OsO4 B. Reaction of an alkene with KMnO4/OH- at room temperature. C. Treating the alkene with O3 gas, followed by reduction with Zn / H2O D. Reaction of an alkene with water (H2O) in the presence of a H+ catalyst.Tunicates are marine animals that are called "sea squirts" because when they are taken out of water, they tend to contract and expel seawater. Lepadiformine is a cytotoxic agent (toxic to cells) isolated from a marine tunicate. During a recent synthesis of lepadiformine, the investigators observed the formation of an interesting by-product (3) while treating diol 1 with a reagent similar in function to PBr3 (J. Org. Chem. 2012, 77, 3390–3400):1.- a) Write the reaction to obtain aromatic polyamides (Aramids), include the molecular structure of Kevlar (p-substituted) and Nomex (m-substituted). b) Which one of the isomers do you expect to have higher crystallinity and why (what intermolecular forces cause this)? c) Which one do you expect to have more chain flexibility and why (although is quite limited on both)? d) Describe the process to obtain Kevlar fibers industrially.
- 2-bromopentane, when treated with alcoholic KOH yields a mixture of three alkenes A, B and C. Identify A, B and C. Which is predominant?Which of the following best estimates the percentages of the three isomeric methylanilines from the reaction shown in Image 10? a. B b. A c. D d. CDHA is a fatty acid derived from sh oil and an abundant fatty acid in vertebrate brains. Hydrogenation of DHA forms docosanoic acid [CH3(CH2)20CO2H] and ozonolysis forms CH3CH2CHO, CH2(CHO)2 (ve equivalents), and HCOCH2CH2CO2H. What is the structure of DHA if all double bonds have the Z conguration?