Bromination of trans-stilbene 1. Describe what problems can occur if a reaction is refluxing too fast...

Bromination of trans-stilbene

1. Describe what problems can occur if a reaction is refluxing too fast or slow.

2. Why is this reaction considered “green” chemistry? How is this different from a “non-green” bromination. What are some disadvantages to “green” chemistry?

3. Is this reaction completely “green” chemistry? Explain why or why not. Think about the first part of question #4 to help.

Expert Solution

queen_honey_blossom answered 1 year ago

Write the reaction for the bromination of cis-stilbene and draw all the stereoisometric products. What is...

Write the reaction for the bromination of cis-stilbene and draw all the stereoisometric products. What is the relationship between the products?

Bromination of Alkenes mass of trans-stilbene = 0.30g products are meso-1,2-dibromo-1,2-diphenylethane and with mp of 238...

Bromination of Alkenes mass of trans-stilbene = 0.30g products are meso-1,2-dibromo-1,2-diphenylethane and with mp of 238 deg C and 110 deg C Molecular weight = 340.058 g/mole mass of trans-cinnamic acid = 0.45g Products are erythro-2,3-dibromo-3-phenylpropanoic acid, mp: 203 deg C and threo-2,3-dibromo-3-phenylpropanoic acid, mp:94 deg C Molecular weight = 307.969 g/mole 10% Br2/CH2Cl2 = 2.0mL for both reactions 3.5 mL methylene chloride for both 1). Mass of trans-stilbene g Mass of trans-stilbene Product g Theoretical Yield of trans-stilbene Product...

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Write an equation for the reaction (ignoring stereochemistry) involving the bromination of a sample of trans-cinnamic...

Write an equation for the reaction (ignoring stereochemistry) involving the bromination of a sample of trans-cinnamic acid(3-phenylpropenoic acid) to form 2,3-dibromo-3-phenylpropanoic acid.

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1) Beginning with 1.0 g of trans-stilbene, 2.0 mL of concentrated aqueous HBr (45% w/w) and...

1) Beginning with 1.0 g of trans-stilbene, 2.0 mL of concentrated aqueous HBr (45% w/w) and 1.6 mL of 30% w/w hydrogen peroxide, identify the limiting reagent and calculate the theoretical yield of the 1,2 dibromoalkane. If you isolated 0.95 g of 1,2-dibromo-1,2-diphenylethane, what would be your percent yield?

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In the bromination reaction of a chalcone, trans-4-nitrochalcone reacts with Br2/CHCl3 to produce erythro-2,3-diBromo-3-(4-nitrophenyl)propiophenone. The product...

In the bromination reaction of a chalcone, trans-4-nitrochalcone reacts with Br2/CHCl3 to produce erythro-2,3-diBromo-3-(4-nitrophenyl)propiophenone. The product is a racemic mixture. a) Draw the structure of the enantiomers you form and assign R & S to each of the stereocenters. b) Will you see two spots on a TLC plate for your reaction products? Why or why not? c) Draw the structures of the products that are not formed in the bromination reaction. d) Is this bromination reaction stereoselective? Why or...

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