Discussion Worksheet Chapter 13 & 14

Discussion Worksheet Chapter 13 & 14 - Chapter 13...

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1. From its mass spectra data determine the molecular formula of compound B and propose a structural formula for it. m/z Relative Abundance 43 100 (base) 78 23.6 (M) 79 1.00 80 7.55 81 0.25 2. Assign each compound its correct spectrum. Spectrum A: m/z = 85, 58, and 43 Spectrum B: m/z = 58 and 29 H O O 2-Methylpentanal 4-Methyl-2-pentanone 3. The mass spectrum of 4-methyl-1-hexene shows intense peaks at m/z 57 and m/z 41. What fragmentation reactions account for these peaks? You must use electron pushing to show this. Done by Dr. Felix N. Ngassa for CHM 242: Organic Chemistry for Life Sciences 2, GVSU, Spring/Summer 2011. 1
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6 H 12 O 2 shows significant fragment ions at m/z 59, 74, and 85. (a) What are the structures of these ions? (b) How are they formed? (Hint: You must use electron pushing to show how they are formed) Done by Dr. Felix N. Ngassa for CHM 242: Organic Chemistry for Life Sciences 2, GVSU, Spring/Summer 2011. 2
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Discussion Worksheet Chapter 13 & 14 - Chapter 13...

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