38 mg of maleic acid was used instead of 40 mg a

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38 mg of maleic acid was used instead of 40 mg A little more than 1 mL of xylene was used Reaction Scheme: This week’s experiment involved a reaction scheme. The reaction scheme is what appears below. Anthracene Maleic Anhydride 9-10-Dihydroanthracene-9,10,alpha, Beta- Succinic Acid Anhydride
Data: anthracene maleic anhydride xylenes 9,10-dihydroanthracene-9,10- α,β-succinic acid anhydride mol. formula C 14 H 10 C 4 H 2 O 3 amount (mg) 81 38 110. (TY) 38.0 (EY) amount (mL) 1.0 mmoles 0.45 0.41 0.41 (TY) 0.28 (EY) molar mass 178.23 98.06 276.30 density 0.86 lit. bp (°C) 137-140 lit.mp ( ° C ) 261-262 [ 263.7-264.1 observed] Observations: The mixture turned yellow after adding xylene After heating, the mixture had white precipitates at the bottom of the conical vial After going through vacuum filtration, a lot of the solute collected on the Hirsch funnel melted right away The solute was a white crystal solid Melting point was observed at 263.7-264.1 °C
Calculations: Percent yield= Actual/ Theoretical x 100 o 38.0 mg/ 110. x 100 = 34.5 % Questions : 1) 2) a. The internal reaction temperature was greater than 140 °C and less than 190 degrees. b. The boiling point of xylene is 140 °C, and this makes sense to maintain the internal temperature to be greater than xylene’s boiling point in order for the Diels Alder reaction to occur between maleic anhydride and anthracene. The sand bath was

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