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- A common alkyne starting material is shown below. Predict the major product for each reaction. Ignore any inorganic byproducts.. The question is asking for 4 drawings. thanksA common alkene starting material is shown below. Predict the major product for each reaction. Ignore any inorganic byproducts.(a) Analyze SN1 or SN2 is preferred in the reaction below. Explain your choice and express themechanisms.
- What is the structure/s of the major organic product/s for the reaction below?How would you synthesize the followingcompounds from benzene using thereagents from the table? Each requires 3-4steps.A common alkyne starting material is shown below. Predict the major product for each reaction. Ignore any inorganic byproducts.
- Following is a balanced equation for bromination of toluene.(a) Using the values for bond dissociation enthalpies given in Appendix 3,calculate ∆H0for this reaction.(b) Propose a pair of chain propagation steps and show that they add up to theobserved reaction.(c) Calculate ∆H0for each chain propagation step.(d) Which propagation step is rate-determininA. propose the efficient synthesis and the mechanism B. give the products for each step and the final productIn SN2 reactions of haloalkanes, the order of reactivity is RI>RBr>RCl>RF. Alkyl iodides are considerably more reactive than alkyl fluorides, often by factors as great as 106. All 1-halo-2,4-dinitrobenzenes, however, react at approximately the same rate in nucleophilic aromatic substitutions. Account for this difference in relative reactivities.
- 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):Compounds A, B, and C have the same molecular formula C4H8. They all react wotu H2/PtO2 to give the same compound. The reaction of A or B with H2O/H2SO4 or with BH3-THF, followed by treatment with a basic solution of hydrogen peroxide, gives the same compound, namely D. The reaction of C with H2O/H2SO4 also gives D. However, the reaction of C with BH3-THF, followed by HO-, H2O2 gives a new compound, E. Provide the identity of A, B, C, D, and E along with explanations of reactivity.Carbocations often rearrange, as shown below. Draw in the hydrogens on the two carbons involved in the rearrangement, and show formal arrow-pushing to illustrate the transformation.