a. Draw the first propagation step for a bromide free radical and the double bond of...
a. Draw the first propagation step for a bromide free radical and the double bond of 1-methylcyclohexene. HINT: One electron from the double bond interacts with the bromide free radical to form a new bond. The other electron from the double bond attaches to one of the carbons. Be sure to use three single-headed arrows, and don't forget to draw the two possible free radical products that will form from this step. Circle the most likely product and explain why it is the major product.
b. Draw the reaction between the major free radical formed in the first propagation step with another equivalent of H-Br. Don't forget to use arrows. Your final product will be an alkyl halide and a bromide free radical.
c. Is the product Markovnikov or anti?
Homework Answers
Add Answer to:
a. Draw the first propagation step for a bromide free radical
and the double bond of...
pleas help 5,6,7,8,9,10 III IV 5. The product of free-radical halogenation reactions is an alkyl halide....
pleas help 5,6,7,8,9,10
III IV 5. The product of free-radical halogenation reactions is an alkyl halide. The major amount of this halide forms during the second step of propagation. However, you should be aware that one possible termination step also forms alkyl halides. Why does the majority of the alkyl halide product come from the propagation step and not the termination step? A. At any given time during the reaction, the concentration of both the alkyl radical and the halide...
Step Question/Exam 3: Draw a radical mechanism for the following photohalogenation reaction Brg t th to...
Step Question/Exam 3: Draw a radical mechanism for the following photohalogenation reaction Brg t th to you ? + H-Br UV light (h) 90% UV-light and a halogen...these are great radical initiation conditions! 1.) Look for a weak bond that would be able to homolytically cleave to form two radicals Draw the resulting radicals: 2.) Identify the most stable site for a radical to sit. Your product distribution will predict where this is FYI. Again, the reactivity of radicals is...
Draw curved arrows to show the movement of electrons in this step of the mechanism.
Electrophilic addition of bromine, Br-, 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 CH2Cl2 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...
Draw curved arrows to show the movement of electrons in this step of the mechanism.
Electrophilic addition of bromine, Br2, 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 CH2Cl2 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...
This is a question on free radical halogenation. How and why does the bromoethane bond form...
This is a question on free radical halogenation.
How and why does the bromoethane bond form for the 2nd resonance
structure?
3. The allylic bromination of the alkene below with NBS gives four different products. Draw the two initially formed free radical intermediates with any applicable resonance structures, then draw the four products. Indicate which product will be the major product and which you would predict to have the lowest yield. Br, hv ® Ýsa Ś Br sminor 3 &+Br....
What is Wrong? Select the keyword or phrase that will best complete each sentence. Key terms: A radical...
What is Wrong?
Select the keyword or phrase that will best complete each sentence. Key terms: A radical is a reactive intermediate with a single unpaired electron, formed by homoloysis of a covalent bond. paired unpaired Allylic radicals are stabilized by resonance, making them more stable than tertiary radicals increases inductive effects A compound that contains an especially weak bond that serves as a source of radicals is called a radical initiator ess homoloysis decreases more J Treatment of cyclohexene...
Predict the major product(s) of the following reactions. Show stereochemistry where appropriate. 3 CO3H i) OsO4...
Predict the major product(s) of the following reactions. Show stereochemistry where appropriate. 3 CO3H i) OsO4 H ii) NaHSO3, H2O CHC13, KOH any cha, kot i) BH3, THF CECH 11) H2O2, NaOH Li NH (liquid) cm X Ft, H/HO (vii) Two Markovnikov products Draw the structure of alkene for each of the following reactions. OH i) BH, THF 11) H202, NaOH 1) Hg(OAc)2, H20 ii) NaBH4 1) 03 ii) Zn/H Styrene undergoes propagation to give polystyrene. Showing electron-flow using half-headed...
Draw the bond line structural formulas for the products in the following reactions in the boxes...
Draw the bond line structural formulas for the products in the
following reactions in the boxes provided (one structure per box).
Where appropiate, clearly show stereochemistry.
[2] e) HBr major product minor product [1.51 ) КОН ethanol НС" Br HC HCI Be prepared to provide structural formula for the starting reactants if given products *** (1 h) 1) O3 2) Zn, H20, H* Но 0 1) O3 2) Zn, H202 0 + [2] 1) KMnO4 141 8. Provide the missing...
4.(18 points) Using the arrow, provide the detailed reaction conditions necessary to give the following. You...
4.(18 points) Using the arrow, provide the detailed reaction conditions necessary to give the following. You do not need to provide any starting material or product, just the reaction conditions (see example below) 1.B Example: Show reagent 'B' followed by aqueous acid: 2. H30 a. Markovnikov addition of H2O to a double bond: b. Anti-Markovnikov addition of H2O to a double bond: c. Markovnikov addition to form an alkyl bromide from an alkene: d. Reaction conditions to change 1,2-dimethylcyclohexene into...
1.1What is the major product formed upon radical bromination of (S)-3-methylhexane? Select the best response. Draw...
1.1What is the major product formed upon radical bromination of (S)-3-methylhexane? Select the best response. Draw the full mechanism. A. (S)-3-bromo-3-methylhexane B. (R)-3-bromo-3-methylhexane C. A mixture of (R) and (S) 3-Bromo-3-methylhexane D. (3R)-1-bromo-3-methylhexane 1.2 What is the major product obtained from the reaction of 2-methyl-2-butene with hydrogen bromide in the presence of peroxides?Select the best response. Draw the mechanism. A. 2,3-dibromo-2-methylbutane B. 2-bromo-3-methylbutane C. 2-bromo-2-methylbutane D. (E)-1-bromo-2-methyl-2-butene 1.3 There are 4 major products formed upon treatment of (E)-3-methyl-2-hexene with HBr...
pleas help 5,6,7,8,9,10
III IV 5. The product of free-radical halogenation reactions is an alkyl halide. The major amount of this halide forms during the second step of propagation. However, you should be aware that one possible termination step also forms alkyl halides. Why does the majority of the alkyl halide product come from the propagation step and not the termination step? A. At any given time during the reaction, the concentration of both the alkyl radical and the halide...
Step Question/Exam 3: Draw a radical mechanism for the following photohalogenation reaction Brg t th to you ? + H-Br UV light (h) 90% UV-light and a halogen...these are great radical initiation conditions! 1.) Look for a weak bond that would be able to homolytically cleave to form two radicals Draw the resulting radicals: 2.) Identify the most stable site for a radical to sit. Your product distribution will predict where this is FYI. Again, the reactivity of radicals is...
This is a question on free radical halogenation.
How and why does the bromoethane bond form for the 2nd resonance
structure?
3. The allylic bromination of the alkene below with NBS gives four different products. Draw the two initially formed free radical intermediates with any applicable resonance structures, then draw the four products. Indicate which product will be the major product and which you would predict to have the lowest yield. Br, hv ® Ýsa Ś Br sminor 3 &+Br....
What is Wrong?
Select the keyword or phrase that will best complete each sentence. Key terms: A radical is a reactive intermediate with a single unpaired electron, formed by homoloysis of a covalent bond. paired unpaired Allylic radicals are stabilized by resonance, making them more stable than tertiary radicals increases inductive effects A compound that contains an especially weak bond that serves as a source of radicals is called a radical initiator ess homoloysis decreases more J Treatment of cyclohexene...
Predict the major product(s) of the following reactions. Show stereochemistry where appropriate. 3 CO3H i) OsO4 H ii) NaHSO3, H2O CHC13, KOH any cha, kot i) BH3, THF CECH 11) H2O2, NaOH Li NH (liquid) cm X Ft, H/HO (vii) Two Markovnikov products Draw the structure of alkene for each of the following reactions. OH i) BH, THF 11) H202, NaOH 1) Hg(OAc)2, H20 ii) NaBH4 1) 03 ii) Zn/H Styrene undergoes propagation to give polystyrene. Showing electron-flow using half-headed...
Draw the bond line structural formulas for the products in the
following reactions in the boxes provided (one structure per box).
Where appropiate, clearly show stereochemistry.
[2] e) HBr major product minor product [1.51 ) КОН ethanol НС" Br HC HCI Be prepared to provide structural formula for the starting reactants if given products *** (1 h) 1) O3 2) Zn, H20, H* Но 0 1) O3 2) Zn, H202 0 + [2] 1) KMnO4 141 8. Provide the missing...
4.(18 points) Using the arrow, provide the detailed reaction conditions necessary to give the following. You do not need to provide any starting material or product, just the reaction conditions (see example below) 1.B Example: Show reagent 'B' followed by aqueous acid: 2. H30 a. Markovnikov addition of H2O to a double bond: b. Anti-Markovnikov addition of H2O to a double bond: c. Markovnikov addition to form an alkyl bromide from an alkene: d. Reaction conditions to change 1,2-dimethylcyclohexene into...
Most questions answered within 3 hours.
-
A sample of n = 25 scores produces a t statistic of t =
-2.062. If...
asked 12 minutes ago -
Given the following, compute the after tax cost of debt: The par
value of the firms...
asked 5 minutes ago -
Coding in C. Please only use stdio.h (which would mean no malloc
or anything like that)...
asked 11 minutes ago -
Use the fundamental accounting equation to find the missing
amounts.
Scenario
Assets
Liabilities
Equity
1
$...
asked 9 minutes ago -
A population has a mean of 200 and a standard deviation of 60.
Suppose a sample...
asked 13 minutes ago -
A bicyclist starting at rest produces a constant angular
acceleration of 1.10 rad/s2 for wheels that...
asked 27 minutes ago -
The
half-life of a radioactive source is 14.0 minutes. How much time
must elapse before the...
asked 25 minutes ago -
Given P(Ec ) = 0.43, P(F) = 0.52, and P(EF) = 0.18.
Find P( E |...
asked 1 hour ago -
Consider two empty containers A and B whose volumes are
10mL and 20mL respectively. 1mL of...
asked 1 hour ago -
QUESTION 6
Determine the linear momentum of a 2,800 kg houseboat going 3
m/s.
9,100 kg.m/s...
asked 1 hour ago -
Jor-el throws a ball upward from the top of a 728 foot building
on the planet...
asked 1 hour ago -
Which of the following will most likely to happen if Federal
Reserve Bank decreases the money...
asked 1 hour ago