Structure: 
IUPAC Name: ethyl 3-oxy-3-phenylpropanoate (ethyl benzoylacetate)
Analysis: C11H12O 3 MW = 192.21
The spectrum shows a small molecular ion peak, and a peak at m-45, suggesting the presence of an ethoxy group (-O-CH2CH3). The very minor peaks at 91 and 43 suggest that the molecule does not contain a benzyl unit or a methyl ketone. The base peak occurs at m/e = 105, and results from loss of a unit of m/e = 73, which is also observed. The molecular ion at 105 is characteristic of a carbonyl bonded directly to an aromatic ring.
MS Fragments:
The spectrum shows a small molecular ion peak, and a peak at m-45, suggesting the presence of an ethoxy group (-O-CH2CH3). The very minor peaks at 91 and 43 suggest that the molecule does not contain a benzyl unit or a methyl ketone. The base peak occurs at m/e = 105, and results from loss of a unit of m/e = 73, which is also observed. The molecular ion at 105 is characteristic of a carbonyl bonded directly to an aromatic ring.
IUPAC Name: ethyl 3-oxy-3-phenylpropanoate (ethyl benzoylacetate)
Analysis: C11H12O 3 MW = 192.21
The spectrum shows a small molecular ion peak, and a peak at m-45, suggesting the presence of an ethoxy group (-O-CH2CH3). The very minor peaks at 91 and 43 suggest that the molecule does not contain a benzyl unit or a methyl ketone. The base peak occurs at m/e = 105, and results from loss of a unit of m/e = 73, which is also observed. The molecular ion at 105 is characteristic of a carbonyl bonded directly to an aromatic ring.
MS Fragments:
The spectrum shows a small molecular ion peak, and a peak at m-45, suggesting the presence of an ethoxy group (-O-CH2CH3). The very minor peaks at 91 and 43 suggest that the molecule does not contain a benzyl unit or a methyl ketone. The base peak occurs at m/e = 105, and results from loss of a unit of m/e = 73, which is also observed. The molecular ion at 105 is characteristic of a carbonyl bonded directly to an aromatic ring.
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