chemsample-lab2-results

Conducted by: Student A + B
 * __Diels-Alder Reaction of 2,3-dimethyl-1,3-butadiene & Maleimide (Double Quant)__ **

The reaction of our vessel in the MARS microwave unit lasted approx. 20 minutes in total time. After vacuum filtering the products, and sufficiently drying them, their weights and melting point ranges were determined (Note – that plural is being used here. Indicating as I said earlier, that we ran //two// samples through the microwave unit). Thus both samples, hereafter referred to as samples 1 & 2, respectively, are reported below ~

**Sample 1 **//: // Maleimide (1.6958g) 2,3-dimethyl-1,3-butadiene (4.0 mL) Water (5.0 mL)

//Dry Solid Weight //: 3.6584g //Melting Point Range //: 105 – 109.4 deg/c //On 2/25 we obtained additional meltng points, two for each of the samples to ensure that our product had no impurities.//
 * //Melting Point Range: 124.5-128.5 and 124.5-127.9//

Maleimide (1.7001g) 2,3-dimethyl-1,3-butadiene (4.0 mL) Water (5.0 mL)
 * Sample 2 **:

//Dry Solid Weight //: 3.4091g //Melting Point Range //: 123.3 – 127.7 deg/c //On 2/25, // //120.8-126.8 and N/A //

__**Diels-Alder Reaction of 2,3-dimethyl-1,3-butadiene & Maleimide (Regular Quant)**__ Conducted by: Student C + D

__Melting Points__ Start (one part) = 63 deg/C Start (part two) = 88 deg/C End = 98 deg/C

2,3-dimethyl-1,3-butadiene with possible malemide contamination as reason for two initial boiling points.

Conducted by Student E + F
 * __Diels-Alder Reaction of Dimethyl fumarate with 2,3-dimethyl-1,3-butadiene__**

Product yield- 1.035 g Percent yield- 1.05 mL * 0.726g/mL = |0.7623 g - 1.035 g| = 0.2727 g /1.035 g = 0.2634 x 100 = 26.34% yield Melting point- product had too much salt, unable to get a melting point because it was at or above 300 degrees C.

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