Consider the following [4+4] cycloaddition process. Would you expect this process to occur through a thermal or photochemical pathway. Justify your answer with MO theory. Draw the frontier orbitals involved.
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- Predict the neutral products of the reaction. Clearly show stereochemistry by drawing a wedged bond, a dashed bond and two in‑plane bonds for the chiral carbon.. Discuss the truth of the following statement. Explain why it is true or false Every SN1 reaction produces racemic mixtures in the productsI'm curious, can a decyclization or some chemical reaction to eliminate sulfur take place here, possibly forming SO2? and besides that, I would like you to give me examples of deciclizations of heterocycles, if they are possible, I honestly don't know
- Could you show the structural formulas of the compounds A-C, whitch of these compounds is the most likely to form if the reaction occures via a chair conformation intermediate and why?.For each of the following reactions, check in the box which of these A or B components represents "highest occupied molecular orbital" (HOMO) and "lowest unoccupied molecular orbital" (LUMO). Once assigned, determine their type of orbitals.Consider the following statement in reference to SN1, SN2, E1, and E2 reactions of haloalkanes. To which mechanism(s), if any, does the statement apply? Substitution at a stereocenter gives predominantly a racemic product
- use frontier molecular orbitals to explain if the 6+2 cycloaddition occurs under thermal or photochemical theory please draw molecular orbitals throughly. thank you very much!Draw the pi molecular orbital (MO) diagrams for cyclopentadiene and maleic anhydride, label whether the new bond formation in this Diels-Alder reaction will be suprafacial or antarafacialA 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) Describe the following compound: b) How many total chiral centers will exist in the product of the reaction of the above compound considering the following sequence? 1) addition of excess Methyl Magnesium Bromide followed by addition of water?This reaction is also an important reaction of the tricarboxylic acid cycle in cells, wherein the reaction occurs in neutral solution, so the acid groups are both ionized to the carboxylate form. The reaction is catalyzed by the stereospecific enzyme fumarase that utilizes only the trans form of 2-butenedioate ion (also known as fumarate) and produces only the (S)-2-hydroxysuccinate enantiomer (also known as (S)-malate). Draw the correct stereochemical structures of these two compounds of the fumarase-catalyzed reaction. Be sure to include all hydrogen atoms and show the carboxylates as anions.Classify each of the following cycloadditions and explain why orbital symmetry conservation rules allow or forbid each of the following reactions to occur as a concerted process.