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Give the structure(s) of the organic product(s) that would result from dehydrohalogenation of 1-iodo-1-methylyclohexane. If more than one structure is possible, indicate which is the major product.
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- List the alkenes that would be formed when 2-bromo-3-methylbutane is subjected to dehydrohalogenation with potassium ethoxide in ethanol and predict which one is the major product.3-Chloro-2-methylpropene reacts with sodium methoxide in methanol to form 3-methoxy-2-methylpropene. For each of the following changes in the reaction conditions, state whether the reaction rate would increase, decrease, or remain the same. Explain your reasoning. In some cases the identity of the major organic product would be expected to change; in such cases, give the expected major product. (a) the same quantities of reagents are dissolved in half the volume of methanol (b) 3-bromo-2-methylpropene is used in place of 3-chloro-2-methylpropene (c) sodium methanethiolate (CH3SNa) is used in place of of sodium methoxideTwo substitution products result from the reaction between 3-chloro-3-methyl-1- butene with sodium acetate (CH3COO – Na +) in acetic acid under SN1. Identify the products.
- Name, draw and describe the organic product of the reaction between 2-methylbut-1-ene and H2O in the presence of H2SO4 and provide a clear rationale as to why this is the major product of the reaction and the minor product of the reaction.3-Chloro-2-methylpropene reacts with sodium methoxide in methanol to form 3-methoxy-2-methylpropene. For each of the following changes in the reaction conditions, state whether the reaction rate would increase, decrease, or remain the same. Explain your reasoning. In some cases the identity of the major organic product would be expected to change; in such cases, give the expected major product. (a) dimethyl sulfoxide (DMSO) is used in place of methanol (b) methanol is used by itself without sodium methoxide (c) 1-chloro-2,2,-dimethylpropane is used in place of 3-chloro-2-methylpropeneElimination of HBr from 2-bromobutane affords a mixture of 1-butene and 2-butene. With sodium ethoxide as base, 2-butene constitutes 81% of the alkene products, but with potassium tert-butoxide, 2-butene constitutes only 67% of the alkene products. Offer an explanation for this difference.
- Write the structures of all the alkenes that can be formed by dehydrohalogenation of the following alkyl halides using sodium ethoxide. Assuming that Zaitsev's rule applies, predict the alkene formed in greatest amount in each case.When 2-bromo-2-methylbutane is treated with a base, a mixture of 2-methyl-2-butene and 2-methyl-1- butene is produced. When potassium hydroxide is the base, 2-methyl-1-butene accounts for 45% of the product mixture. However, when potassium tert-butoxide is the base, 2-methyl-1-butene accounts for 70% of the product mixture. What percent of 2-methyl-1-butene would be in the mixture if potassium propoxide were the base? base Br A. Less than 45% B. C. 45% Between 45% and 70% D. More than 70%Alkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product of the reaction is a vinyl alcohol, also called an enol. The enol immediately rearranges to a more stable ketone via tautomerization. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions -X티 Hö: H-O -CH3 -CH3 H30*
- (1) Name the major product of the reaction between (S)-2-bromohexane and KCH3COO. Be specific with the configuration. (2) Name the alcohol that will produce the most stable intermediate and the dehydration product 2-methyl-1,3-pentadiene. (3) Give the name of the product between benzyl alcohol and pyridinium chlorochromate.Bromine reacts with alkenes in methanol according to the equation when this reaction was carried out with 4-tert-butylcyclohexene, only one isomer was formed with the molecular formula C12H23BrO (80% yield). Which of the following is the structure more reasonable for this compound? Explain your reasoning through a corresponding mechanism.Draw the organic product obtained on treatment of each of the following two alkenes with bromine: (a) trans-2-pentene and (b) 1- methylcyclohexene. Having done this, draw the product of the reaction of these same alkenes with bromine in aqueous solution.