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- 1- Chloro-1,2-diphenyletane can undergo E2 elimination to give either cis- or trans-1,2-diphenylethylene (stilbene). Draw New man projections of the reactive conformations leading to both possible products, and suggest a reason why trans alkene is the major product?By considering the stereochemical requirements for E2-elimination, and using an appropriate illustration need help indicating whether the more stable conformer (conformer B) of trans-1 can undergo E2 elimination. Thank you :)Write the structure of the compound E,E-2,4-Hexadien-1-ol and label each non-equivalent carbon with a letter, A,B,C..
- Stretch the structure for (S)-3-bromo-2-methylpentane and add the stereochemistry at all stereogenic centers.The compound 3,4-dimethyl-hexan-3-ol of 3R, 4S configuration is treated with a concentrated HBr solution at room temperature. A mixture of two stereoisomers is obtained.If the reaction mixture above is heated, the appearance of several other compounds is observed. 1) Draw the different compounds obtained using the wedge-flywheel representation. 2) What is the majority product? Explain 3) Propose a modification of the experimental conditions in order to obtain the exclusive formation of these compounds obtained after heatingBenzene is one of the compounds used as octane enhancers in unleaded gasoline. It is manufactured by thecatalytic conversion of acetylene to benzene: 3C2 H2(g) ⇌ C6 H6(g). Which value of Kc would make this reactionmost useful commercially? Kc ≈ 0.01, Kc ≈ 1, or Kc ≈ 10. Explain your answer
- On the line drawn below, provide the systematic (IUPAC) name for the following structure. Be sure to include stereochemistry (R/S, cis-trans, or E/Z) when appropriate.A difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired configuration. a. Label this stereogenic center as R or S. b. A well known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship. c. Suggest a reagent to convert A to the single stereoisomer X.A difficult problem in the synthesis of PGF2α is the introduction of the OH group at C15 in the desired conguration.a. Label this stereogenic center as R or S.b. A well known synthesis of PGF2α involves reaction of A with Zn(BH4)2, a metal hydride reagent similar in reactivity to NaBH4, to form two isomeric products, B and C. Draw their structures and indicate their stereochemical relationship.c. Suggest a reagent to convert A to the single stereoisomer X.
- 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.Stereoisomers of α-bromocinnamic acid: draw the reaction mechiansim with arows for the dehydrobromination of 2,3-dibromo-3-phenylpropanoic acid with ethanol and KOH to produce (Z)-α-bromocinnamic acid and (E)-α-bromocinnamic acid. Also draw the transition state for The (Z)-isomer syn-periplanar transition state and anti-periplanar transition state of the (E)-isomer.Identify A, B, and C, intermediates in the synthesis of the ve-membered ring called an α-methylene-γ-butyrolactone. This heterocyclic ring system is present in some antitumor agents.