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| Topic: |
Science
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| Number of pages / Number of words: |
3 / 600 |
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The percent yield was calculated to be 57%. Based on the melting point range, the unknown diene was identified to be ?a-phellandrene.
Percent Yield Calculation
Discussion:
Based on experimental melting point range obtained,108??C - 110??C of the adduct sample, it was concluded that the unknown diene was ?a-phellandrene whose adduct has a literature melting point range of 126-127?¬C (Lehman, 132)...
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The difference in melting point range of the experimental from the literature value could have been caused by impurities remaining in the sample and by not allowing the adduct to dry long enough after recrystallizing with methanol. The recrystallized adduct had a 57% recovery. Low recovery could have been due to loss of sample when transferring mixture and losing some sample during vacuum filtration...
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