Organic II Lab: Addition of Bromine to trans-Cinnamic Acid 12 mL of 1.0 M bromin

Question

Organic II Lab: Addition of Bromine to trans-Cinnamic Acid

12 mL of 1.0 M bromine, 0.012 mole trans-cinnamic acid, 7.0 mL acetic acid

1) Assume you only used half the amount of bromine solution given in the procedure, how might this affect your results?

A) Since we are using a 100% excess of bromine for the reaction, yield will not be affected

B) The yield is reduced by about half and the product will contain a combination of both unreacted trans-cinnamic acid and the dibromide

C) Since this is an equilibrium reaction, yield is increased

D) This will not affect thr eyield but the reaction will proceed at half the rate

2) Erythro or threo?

Organic II Lab: Addition of Bromine to trans-Cinnamic Acid 12 mL of 1.0 M bromine, 0.012 mole trans-cinnamic acid, 7.0 mL acetic acid 1) Assume you only used half the amount of bromine solution given in the procedure, how might this affect your results? A) Since we are using a 100% excess of bromine for the reaction, yield will not be affected B) The yield is reduced by about half and the product will contain a combination of both unreacted trans-cinnamic acid and the dibromide C) Since this is an equilibrium reaction, yield is increased D) This will not affect thr eyield but the reaction will proceed at half the rate 2) Erythro or threo?

Explanation / Answer

1) A) Since we are using a 100% excess of bromine for the reaction, yield will not be affected

2) Erythrose

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