Please show the reaction mechanisms for the following 2 reactions.
Addition of Bromine to trans-Stilbene
Elimination of HBr from Stilbene Dibromide
Homework Answers
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Please show the reaction mechanisms for the following 2
reactions.
Addition of Bromine to
trans-Stilbene
Elimination...
Draw the mechanisms of each reaction and specify which rxn they under. please and thank you!!...
Draw the mechanisms of each reaction and specify which
rxn they under. please and thank you!!
Н C=C / н trans-addition of H--Br Br Н- - Br H Br (1R,2S)-meso-Stilbene dibromide mp 236-237°C, MW 340.07 Pyridinium hydro- bromide perbromide MW 319.86 E-Stilbene MW 180.24 - Br Н- HOCH,CH,OCH,CH,OCH,CH,OH Triethylene glycol bp 290°C + 2 КОН Br Н- MW 56.00 (IR,2S)-meso-Stilbene dibromide MW 340.07 Diphenylacetylene mp 61°C, MW 178.22 tha oxidation of
alswering these questions. 1. If the bromination of trans-stilbene proceeded by syn addition what isomer(s) of...
alswering these questions. 1. If the bromination of trans-stilbene proceeded by syn addition what isomer(s) of stilbene dibromide would be formed? 2. If the bromination of trans-stilbene proceeded by anti addition what isomer(s) of stilbene dibromide would be formed? 3. Which isomer(s) of stilbene dibromide would be formed if the reaction followed Mechanism 4? Mechanism 4: Bromination is a multi-step process. In this mechanism, the pi bond attacks the bromine molecule as in Mechanism 1. Some time after the carbocation...
1. (4 pts) Given the masses of meso-stilbene dibromide and potassium hydroxide, please calculate the theoretical...
1. (4 pts) Given the masses of meso-stilbene dibromide and potassium hydroxide, please calculate the theoretical yield of the expected reaction product, diphenylacetylene, in grams. Your final answ appear in the box provided, or it will not be counted. Show all work to receive credit. Br +KOH + KOH Br diphenylacetylene meso-stilbene dibromide Molecular Weight (g/mol) 340.058 g/mol 56.105 g/mol mass (grams) 178.234 g/mol 0.800 g 0.400 g
Look up and draw the mechanism for the addition of Br2 to double bonds. Reference the...
Look up and draw the mechanism for the addition of Br2 to
double bonds. Reference the source from which you acquired the
mechanism.
Give the IUPAC name of the major product in the above-mentioned
reaction.
Draw the major product of obtained in the addition of Br2 to
stilbene.
Is this isomer chiral? What would be the optical rotation if
this sample was placed in a polarimeter?
Would a student obtain the same product if you started with
cis-stilbene instead of...
Is the stereochemistry of the ionic addition of bromine to trans-cinnamic acid syn or anti addition? Why? I recorded a b...
Is the stereochemistry of the ionic addition of
bromine to trans-cinnamic acid syn or anti addition? Why? I
recorded a bp of 195 C.
3-phenylpropanoic acid, a dibromide with two le; these are shown here as their Fischer projections: i C. Hg C. Hg CHE CaHs HBr BrH H Br Br- H Br- H H -Br - HBr BrH COZH COH CO2H CO2H 2S,3S 2R,3R 28,35 2S,3R Enantiomeric Pair (threo diastereomers) mp 93.5-95.0°C Enantiomeric Pair (erytho diastereomers) mp 202-204 °C...
How do you determine if an addition of bromine to trans-stilbene is stereospecific based on the...
How do you determine if an addition of bromine to trans-stilbene is stereospecific based on the melting point of the product from the reaction? How would measuring the optical rotation of the product help identify it?
please help with number 6! 1.(2) What is the meaning of “E” in E-stilbene? 2.(4) What...
please help with number 6!
1.(2) What is the meaning of “E” in E-stilbene? 2.(4) What functional groups are present in E-stilbene? 3.(2) Write the reaction that occurs between E-stilbene and bromine. 4.(4) Write the mechanism for the addition of bromine to €- stilbene to give meso-stilbene dibromide via the intermediate cyclic bromonium ion. 5.(2) Which reagent, E-sitlbene or bromine, acts as the nucleophile in this reaction? Which reagent is the electrophile? 6.(4) Calculate the theoretical yield of meso-stilbene dibromide...
please help with filling out this table and answering 8 questions Data Table Br H CH2CH3OH...
please help with filling out this table and answering 8
questions
Data Table Br H CH2CH3OH N-H Bry Chemicals H (E)-Stilbene Ethanol Pyridinium tribromide CsH.Br3N Stilbene Dibromide C14H12Br2 Molecular Formula C14H12 CHO Molecular Weight 180.25 g/mol 46.07 g/mol 319.82 g/mol 340.06 g/mol Physical Properties White solid Clear liquid White solid White solid Melting Point 122-124 °C N/A 127-133 °C 241-243 °C Amount needed 0.25 g 10 mL 0.5 g Mole needed 1.39 mmol 1.56 mmol Amount Used Moles Used Amount...
Classify each of the following organic reactions. Substitution Elimination Addition Type of Reaction Reaction OH CH2-CH...
Classify each of the following organic reactions. Substitution Elimination Addition Type of Reaction Reaction OH CH2-CH + HCN– CH3-CH-CN CH3-CH2-CH2-OH + HBr – CH3-CH2-CH2-Br + H2O CH3-CH=CH-CH3 + HBr – CH3-CH-CH2-CHz Br
1. Most of the class will be brominating trans-stilbene (part B) and the rest cis-stilbene (part...
1. Most of the class will be brominating trans-stilbene (part B) and the rest cis-stilbene (part A). For this assignment write a detailed procedure in your lab notebook for Part B. Upload a picture/scanned copy (5 pts). Tip: If you write the procedure down the left half of the page, you can leave space to record your measurements/observations down the right side of the page. If you end up using cis-stilbene in the experimental there will only be a few...
Draw the mechanisms of each reaction and specify which
rxn they under. please and thank you!!
Н C=C / н trans-addition of H--Br Br Н- - Br H Br (1R,2S)-meso-Stilbene dibromide mp 236-237°C, MW 340.07 Pyridinium hydro- bromide perbromide MW 319.86 E-Stilbene MW 180.24 - Br Н- HOCH,CH,OCH,CH,OCH,CH,OH Triethylene glycol bp 290°C + 2 КОН Br Н- MW 56.00 (IR,2S)-meso-Stilbene dibromide MW 340.07 Diphenylacetylene mp 61°C, MW 178.22 tha oxidation of
alswering these questions. 1. If the bromination of trans-stilbene proceeded by syn addition what isomer(s) of stilbene dibromide would be formed? 2. If the bromination of trans-stilbene proceeded by anti addition what isomer(s) of stilbene dibromide would be formed? 3. Which isomer(s) of stilbene dibromide would be formed if the reaction followed Mechanism 4? Mechanism 4: Bromination is a multi-step process. In this mechanism, the pi bond attacks the bromine molecule as in Mechanism 1. Some time after the carbocation...
1. (4 pts) Given the masses of meso-stilbene dibromide and potassium hydroxide, please calculate the theoretical yield of the expected reaction product, diphenylacetylene, in grams. Your final answ appear in the box provided, or it will not be counted. Show all work to receive credit. Br +KOH + KOH Br diphenylacetylene meso-stilbene dibromide Molecular Weight (g/mol) 340.058 g/mol 56.105 g/mol mass (grams) 178.234 g/mol 0.800 g 0.400 g
Look up and draw the mechanism for the addition of Br2 to
double bonds. Reference the source from which you acquired the
mechanism.
Give the IUPAC name of the major product in the above-mentioned
reaction.
Draw the major product of obtained in the addition of Br2 to
stilbene.
Is this isomer chiral? What would be the optical rotation if
this sample was placed in a polarimeter?
Would a student obtain the same product if you started with
cis-stilbene instead of...
Is the stereochemistry of the ionic addition of
bromine to trans-cinnamic acid syn or anti addition? Why? I
recorded a bp of 195 C.
3-phenylpropanoic acid, a dibromide with two le; these are shown here as their Fischer projections: i C. Hg C. Hg CHE CaHs HBr BrH H Br Br- H Br- H H -Br - HBr BrH COZH COH CO2H CO2H 2S,3S 2R,3R 28,35 2S,3R Enantiomeric Pair (threo diastereomers) mp 93.5-95.0°C Enantiomeric Pair (erytho diastereomers) mp 202-204 °C...
please help with number 6!
1.(2) What is the meaning of “E” in E-stilbene? 2.(4) What functional groups are present in E-stilbene? 3.(2) Write the reaction that occurs between E-stilbene and bromine. 4.(4) Write the mechanism for the addition of bromine to €- stilbene to give meso-stilbene dibromide via the intermediate cyclic bromonium ion. 5.(2) Which reagent, E-sitlbene or bromine, acts as the nucleophile in this reaction? Which reagent is the electrophile? 6.(4) Calculate the theoretical yield of meso-stilbene dibromide...
please help with filling out this table and answering 8
questions
Data Table Br H CH2CH3OH N-H Bry Chemicals H (E)-Stilbene Ethanol Pyridinium tribromide CsH.Br3N Stilbene Dibromide C14H12Br2 Molecular Formula C14H12 CHO Molecular Weight 180.25 g/mol 46.07 g/mol 319.82 g/mol 340.06 g/mol Physical Properties White solid Clear liquid White solid White solid Melting Point 122-124 °C N/A 127-133 °C 241-243 °C Amount needed 0.25 g 10 mL 0.5 g Mole needed 1.39 mmol 1.56 mmol Amount Used Moles Used Amount...
Classify each of the following organic reactions. Substitution Elimination Addition Type of Reaction Reaction OH CH2-CH + HCN– CH3-CH-CN CH3-CH2-CH2-OH + HBr – CH3-CH2-CH2-Br + H2O CH3-CH=CH-CH3 + HBr – CH3-CH-CH2-CHz Br
1. Most of the class will be brominating trans-stilbene (part B) and the rest cis-stilbene (part A). For this assignment write a detailed procedure in your lab notebook for Part B. Upload a picture/scanned copy (5 pts). Tip: If you write the procedure down the left half of the page, you can leave space to record your measurements/observations down the right side of the page. If you end up using cis-stilbene in the experimental there will only be a few...
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