Question

Please draw a potential structure based on the [M], IR, H NMR, and C NMR

Mass Spectrometry (not shown): [M] = 148 m/z Infrared Spectroscopy (not shown): 3062, 2964, 2934, 1687, 1449, 1214 cm 'H Nuclear Magnetic Resonance. 8 7 6 2H 1H2H 5 4 PPM 2H - 2H 3H * Nuclear Magnetic Resonance. 220 .200 .180 .160 .140 120 100 .80 .60 40 20

Answer 1

Hi Dear Friend, the unknown is Butyrophenone (IUPAC: 1-phenylbutan-1-one, M.F: C₁₀H₁₂O)

Сх

Mass: M⁺ (Molecular ion) at m/z 148, base peak is found at m/z 105

IR:

3062 cm-1, medium is due to aromatic sp2 =C-H stretch

2964 & 2934 cm-1, strong are due to sp3 alkane C-H stretch

1687 cm-1, strong is due to aryl ketone C=O stretch

1449 cm-1, medium is due to sp3 alkane C-H bending

1214 cm-1, strong is due to C-O stretch during resonance of C=O group

HNMR & CNMR:

Mass Spectrometry (not shown): [M] = 148 m/z Infrared Spectroscopy (not shown): 3062, 2964, 2934, 1687, 1449, 1214 cm 'H Nuclear Magnetic Resonance. a QE 8 .. 2H 1H2H 7 6 5 4 PPM 2H - 2H 3H * Nuclear Magnetic Resonance. 4,5 23 6 220 .200 .180 .160 .140 120 100 .80 .60 40 20

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