Analysis of an unknown organic compound K produces the following results.
Elemental analysis by mass of compound K
- Carbon (C): 80.60%
- Hydrogen (H): 7.46%
- Oxygen (O): 11.94%
Mass spectrum of compound K
- Key peaks at m/z=134m/z = 134m/z=134 (molecular ion peak), 105 (base peak), and 77.
IR spectrum of compound K
- Strong absorption at 1685 cm-1
- Absorptions at 1600 cm-1 and 1450 cm-1
- Absorptions just above and just below 3000 cm-1
Proton (1H^1\text{H}1H) NMR spectrum of compound K
- Multiplet at δ=7.4−8.0 ppm\delta = 7.4 - 8.0\text{ ppm}δ=7.4−8.0 ppm, relative peak area = 5
- Quartet at δ=3.0 ppm\delta = 3.0\text{ ppm}δ=3.0 ppm, relative peak area = 2
- Triplet at δ=1.2 ppm\delta = 1.2\text{ ppm}δ=1.2 ppm, relative peak area = 3
