Preparation of Dibromosuccinic Acid- Post Lab 9

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Observations
1.      Within 5 minutes the color of the solution starts to become colorless.
2.      We added around .5ml of the bromine stock solution to the solution while it was on the water bath.
3.      The product of this experiment was in the vacuum filter for 20 minutes.
Data
Fumaric acid: 0.19
Bromine: 2.7 ml
Final weight of Fumaric acid: .59g
Theoretical yield: 0.0028 mol x 275.88 g/mol = 0.77g
Percentage yield: .59g/0.77g x 100%= 76%
Melting point 250-255 ◦C
Question
Which stereoisomer of dibromosuccinic acid (racemic melting point = 170oC, meso melting point = 290oC) did you obtain?
The stereoisomer of dibromosuccinic is Meso. The melting point of our experiment product is between 250-255 ◦C. It is not exact meso melting point however, it is closer to meso than racemic melting point.

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