chem 230L dehydration of 2-methylcyclohexanol

What is the slow, rate-determining step, in the acid-catalyzed dehydration of 2- butanol? Loss of a b-hydrogen from the carbocation to form an alkene. Protonation of the alcohol to form an oxonium ion. Loss of water from the oxonium ion to form a carbocation. The simultaneous loss of a B-hydrogen and water from the oxonium ion.

CH3 CH3 Br- Br2 .CH3 CH2Cl2 CH3 H3C H3C Br Electrophilic addition of bromine, Brɔ, to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH,Cl,. In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions CH3 CH3 CH3 CH3 H3C H3C :Br: :Br:

10) Synthesis: Make the following products from a suitable cyclic alkene starting material. Look at the functional group PATTERN present in the molecule, including stereochemistry. Br CH3 Br CH3

10) Synthesis: Make the following products from a suitable cyclic alkene starting material. Look at the functional group PATTERN present in the molecule, including stereochemistry. ♡ Br Br

5.Synthesis. Make the following products from a suitable cyclic alkene starting material. Look at the functional group PATTERN present in the molecule, including stereochemistry. Br CH 3 Br CH3

In industrial process, rate of reaction is an important aspect to enhance productivity. In your opinion, how can a company enhance production of alkene from alkyl halide? H20 `CI 3-methylbut-1-ene 1-chloro-3-methylbutane I. Increase concentration of water II. Increase concentration of 1-chloro-3-methylbutane III. Use 1-iodo-3-methylbutane instead IV. Use 1-fluoro-3-methybutane instead O a. Il and IV O b. I and IV O c. I, II, and III O d. I, Il and IV e. Il and III

1. Write the structure of the major organic product for reactions a, b and e? H₂C b. H₂c- CH, CH₂ Cold KMnO, OH A KMnO, H c. CH3CH₂-CH=CH-CH₂CH3 + H₂SO4 →

Hi! I am working on some Organic Chemistry homework and one of the questions asked what would happen if Butanol was used as a solvent instead of water when mixed with methanol,ethanol, and hexan-1-ol

help me please Please fill in the reagents,intermediates, and/or products of the following reactions.     all the reactions shall be covered in Chapter 12-15 from Organic Chemistry, 6th Edition by Marc Loudon and Jim Parise.

Question 13 of 28 Fill in the blanks: Professor Lolita Carbon has assigned the analysis of unknown hydrocarbon samples to Enteng Mabutingting based on their reaction profile. The summary of the observed reactions are tabulated below along with the possible structures of the samples. Identify each unknown sample by matching the respective reaction profile with the given structures. Name each structure. Sample 1 2 3 H3C. H3C Br₂ in CCl4 (dark) Fading of reddish-brown color Fading of reddish-brown CH3 No reaction 1 A Complete the table below. Sample 2 color 3 CH3 Br₂ in CCl4 (light) Fading of reddish- brown color Fading of reddish- brown color Fading of reddish- brown color H₂C B B Compound (Letters only) C CH3 5-diyne KMnO4 in NaOH No reaction Brown precipitates Brown precipitates H₂C C AgNO3 in NH3 No reaction No reaction Silver precipitates CH3 Name 1-ethyl cycloh hexa-1 A

orgo chem questions

4. Show the steps and reagents needed to transform 1-propyne into 2-methylheptane. You may use any alkyl halide and inorganic reagents. 1-propyne → 2-methylheptane

Can you explain it? Provide examples with the various steps and explanations. How halogens affect the boiling/melting point? Does number of halogens affect it? For example, Ch3-Ch3 vs Ch3-Br vs Br-Ch3-Br

Bn Draw the structure of the major organic product formed from the reaction below. Bn H ད ་ + HỌỌC. NH2 N DCC .... NH H Bn

5.Synthesis. Make the following products from a suitable cyclic alkene starting material. Look at the functional group PATTERN present in the molecule, including stereochemistry. Br Br

The pictured reaction shows an alkyl bromide being converted into an alkene. Choose all reagents that would produce the pictured alkene as the major product. A) NaOH/H2O B) H2O C) tBuOK/tBuOH D) EtONa/EtOH

Can this alcohol be synthesized selectively by hydroboration-oxidation of an alkene?

Chemistry Draw the structure of the missing reactants intermediate or products in the following mechanism. will rate.

1. The acid-catalyzed elimination of an alcohol is an equilibrium reaction and requires special reac- tion conditions to favour the formation of the alkene product. What chemical principle controls the amount of alkene product that is produced? Provide two laboratory techniques that can be used to obtain good alkene yields in alcohol elimination reactions.

1. Predict the product(s) and propose a mechanism of the following nucleophilic substitution reaction. Remember that a mechanism should contain arrows to show movement of electrons, all intermediates and appropriate formal charges. Br + H₂O →

HW 10# 1 I need help with the last part (Part 3)

The conversion of alcohols into alkyl halides by reaction with hydrogen halides is an example of a Nucleophilic Substitution Reaction. This kind of reaction can proceed by two different mechanisms depending on the structure of alcohol substrates used. Generally, primary alcohols are substituted via SN2 mechanism, while secondary and tertiary alcohols undergo SN1 mechanism. Consider the following reaction given in the picture below and the questions in the picture too.

Select the correct statements regarding the reactions of tertiary haloalkanes. *         A- Tertiary haloalkanes form alkenes through both the E1 mechanism and the E2 mechanism.         B- Tertiary haloalkanes react with water to form ethers.         C- A tertiary haloalkane always forms a tertiary carbocation as an intermediate when a substitution reaction occurs.         D- A tertiary haloalkane always forms a tertiary carbocation as an intermediate when an elimination reaction occurs.

Predict the major products of both organic reactions. Be sure to use wedge and dash bonds to show the stereochemistry of the products when it's important, for example to distinguish between two different major products. + X H₂O Click and drag to start drawing a structure. + © A B 1. Hg (OAc)2, H₂O Click and drag to start drawing a structure. 2. NaBH4

Consider the reaction of 2-bromo-2-methylpropane with water, shown below, to answer the following question(s). CH3 H₂C-C-Br CH₂ H₂C- CH3 Diagram 1: The first step of this reaction is shown below. CH3 CH3 1 H₂C-C-Br H₂C C + T CH3 a. CH3 B Diagram 2: The second and third steps of the reaction are shown below. CH₂ CH CH₂ b. C. H₂O CH₂ d. 10 CH3 H₂C-C-OH + H H HC C a rearrangement reaction. an elimination reaction. an addition reaction. CH₂ H Br 1 HBr 1) Refer to Diagram 1 and 2. This reaction is an example of: a substitution reaction. ÖH₂ H₂C-C- CH₂ H + H₂O*

Provide the major substitution product for the following reaction.

Acyl transfer (nucleophilic substitution at carbonyl) reactions proceed in two stages via a "tetrahedral intermediate." Draw the tetrahedral intermediate as it is first formed in the following reaction. CI H₂N OH • You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • Do not include counter-ions, e.g., Na+, I, in your answer. • In cases where there is more than one answer, just draw one. Sn [F

HO-A-OH HO-C-B-C-OH ethylene glycol (A group) terephthalic acid (B group) The starting materials fer this reaction are ethylene glycol and terephthalic acid. The letters A and B represent organic groups that are unreactive. What reactive organic functional group does ethylene glycol (containing the A functional group) contain? Enter its name. Recheck Next (1 of 7) 2nd attempt

Use the following reagent table for the reaction of : cyclohexanol + H2 SO4 → cyclohexene Chemical MW (g/mol) Density (g/mL) mmols used Amount used cyclohexanol 100.16 0.9624 1.50 mL Sulfuric Acid 98.08 1.83 1.0 mL cyclohexene 82.14 How many mmols of sulfuric acid are used? (answer with 2 decimal places, no units)

Hydroboration of Alkenes vs. Alkynes. Addition of an alkylboranes to a carbon- carbon double bond ("hydroboration") followed by oxidation is a common way to alcohols, for example, addition of dimethylborane to 2,3-dimethyl-2-butene yields 2,3-dimethyl-2-butanol. Me₂BH + Me₂C=CMe₂- →→ Me₂CH-CMe₂OH The reaction is more general as borane also adds to carbon-carbon triple bonds. obtain structures and energies for reactants and transition states for addition of dimethylborane (Me₂BH) to both ethylene and acetylene. Which reaction has the lower activation energy? Offer an explanation for your result.

7:51 PM Sun Oct 16 ← Question 9 of 15 HO Curved arrows are used to illustrate the flow of electrons. Follow the curved arrows and draw the hydrocarbon product of the following reaction. Include all lone pairs and charges as appropriate. Ignore inorganic byproducts. H3C. CH3 CH3 @ 100% Select to Draw Submit