Show the formation of carbocations for each of the following steps: CF3 Н,о Нeat .CI AICI, In the following, carbocation undergo rearrangement through hydride shift and alkyl shift. Explain by drawing the steps: Hydride shift Alkyl shift
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- Help with the following ochem reaction scheme... Consider 3,4-dimethylpiperidine being subjected to the below reaction scheme: step 1) CH3I (excess) step 2) NaOH, heat step 3) CH3I (excess) step 4) NaOH, heat Provide the bond line structures for the major organic product obtained in each step and then discuss the regiochemistry for step 2.Explain how and why rearrangements occurduring Friedel-Crafts alkylation reactions formingmore than 1 product. Also illustrate therearrangement reaction from the aboveexample.Chemistry Give the products of the reaction of 1 mole of 2-methy1-1,3-pentadiene with 1 mole of HBr. Whichproduct(s) will predominate if the reaction is under kinetic control? Which products) will predominateif the reaction is under thermodynamic control?
- In the presence of acid such as H2SO4, 3,4-dimethyl-1-pentene undergoes isomerization to 2,3-dimethyl-2-pentene (shown below). Write a complete mechanism, showing all steps and using curved arrows to explain this observation.The hydroboration–oxidation of internal alkynes produces ketones.(a) When hydroboration–oxidation is applied to but-2-yne, a single pure product isobtained. Determine the structure of this product, and show the intermediates in itsformation.(b) When hydroboration–oxidation is applied to pent-2-yne, two products are obtained.Show why a mixture of products should be expected with any unsymmetricalinternal alkyne.Organotin compounds play a significant role in diverse industrial applications. They have been used as plastic stabilizers and as pesticides or fungicides. One method used to prepare simple tetraalkylstannanes is the controlled direct reaction of liquid tin(IV) chloride with highly reactive trialkylaluminum compounds, such as liquid triethylaluminum (Al(CzHs)3). 3SnCl4 + 4Al(C2H5)3 → 3Sn(C2H5)4 + 4AlCl3 In one experiment, 0.160 L of SnCl4 (d= 2.226 g/mL) was treated with 0.346 L of triethylaluminum (Al(C2H5)3); d = 0.835 g/mL). What is the theoretical yield in this experiment (mass of tetraethylstannane, Sn(C2H5)4)? If 0.257L of tetraethylstannane (d= 1.187 g/mL) were actually isolated in this experiment, what was the percent yield?
- Show how free-radical halogenation might be used to synthesize the followingcompounds. In each case, explain why we expect to get a single major product.(a) 1-chloro-2,2-dimethylpropane (neopentyl chloride)The hydroboration–oxidation of internal alkynes produces ketones.(a) When hydroboration–oxidation is applied to but-2-yne, a single pure product isobtained. Determine the structure of this product, and show the intermediates in itsformation.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.
- The following reaction is similar to the dehydration of 2-methylcyclohexanol. However, a significant amount of a terrasubstitued alkene is expected. Predict the structure for this tetrasubstituted alkene. Also, using curved arrows provide a reasonable mechanism for its formation.Organotin compounds play a significant role in diverse industrial applications. They have been used as plastic stabilizers and as pesticides or fungicides.One method used to prepare simple tetraalkylstannanes is the controlled direct reaction of liquid tin(IV) chloride with highly reactive trialkylaluminum compounds, such as liquid triethylaluminum (Al(C2H5)3). 3SnCl4 + 4Al(C2H5)3 3Sn(C2H5)4 + 4AlCl3 In one experiment, 0.230 L of SnCl4 (d = 2.226 g/mL) was treated with 0.396 L of triethylaluminum (Al(C2H5)3); d = 0.835 g/mL). If 0.335 L of tetraethylstannane (d = 1.187 g/mL) were actually isolated in this experiment, what was the percent yield?Conformation control of reaction mechansims. Consider the reaction below: Provide all possible elimination products from this reaction and identify the major elimination product. Provide mechanisms (with curved arrows) that clearly explain the reaction outcome.