Use the information provided to suggest a possible structure. Full credit will o

Question

Use the information provided to suggest a possible structure. Full credit will only be awarded if work is shown as to how you arrived your answer. Partial credit will be awarded for correctly interpreted parts of the data even if the correct structure is not determined.

Use the information provided to suggest a possible structure. Full credit will only be awarded if work is shown as to how you arrived at your answer. Partial credit will be awarded for correctly interpreted parts of the data even if the correct structure is not determined. 24. Molecular Formula C3H6O2 C NMR peaks at 20.4 (CH3), 51.6 (CH3) and 170.2 (C) H NMR peaks at 2.19 (s), 3.66 (s) 60 40 180 160 140 120 100 60 MS mass of molecular ion 74 m/z IR neat 100 80 60 75 100 125 m/z

Explanation / Answer

Answer = CH3-C(O)-OCH3 Methyl acetate.

13C-NMr

20 ppm for CH3 (methyl group)

51 ppm for OCH3 ( methoxy group)

170 ppm for C=O (carbonyl group)

1H-NMR

2.1 ppm for CH3 ( methyl group)

3.6 for OCH3 ( methoxy group)

IR - peak around 1700 cm-1 for carbonyl C=O stretch

Mass - molecular ion peak is 74 ( m.wt of this ester is 74)

peak at 43 parant ion peak is for [CH3-C=O]+

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