#2. CeH100 4000 'H NMR triplet, triplet, 2H 2H multiplet, multiplet, 2H singlet, 1H 3H 9.0 8.0 7.0 6.e 5.0 4.0 3.0 2.0 1.e 13C NMR 100 140 80 PPM 120 60
#2. CeH100 4000 'H NMR triplet, triplet, 2H 2H multiplet, multiplet, 2H singlet, 1H 3H 9.0 8.0 7.0 6.e 5.0 4.0 3.0 2.0 1.e 13C NMR 100 140 80 PPM 120 60
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Predict the structure of the molecule with molecular formula C8 H10 O using given information about its 1H NMR, 13C NMR, and IR.

Transcribed Image Text:The image contains three sections that represent different spectroscopic analyses of an organic compound with the formula C₈H₁₀O.
### Infrared (IR) Spectrum
The top section displays an IR spectrum, which is a graph plotting absorption (y-axis) against wavenumber (x-axis, in cm⁻¹). The spectrum shows various peaks that indicate the presence of different functional groups within the molecule. Notable features include a broad peak around 3400 cm⁻¹, which is characteristic of O-H stretching, and sharp peaks around 1600-1500 cm⁻¹ which could indicate C=C aromatic stretching.
### Proton Nuclear Magnetic Resonance (^1H NMR) Spectrum
The middle section shows a ^1H NMR spectrum, which is a graph of chemical shift (in ppm) versus signal intensity. The spectrum includes:
- A multiplet for 2 hydrogen atoms (2H) around 7.4 ppm.
- A multiplet for 3 hydrogen atoms (3H) around 7.1 ppm.
- A triplet for 2 hydrogen atoms (2H) around 4.1 ppm.
- Another triplet for 2 hydrogen atoms (2H) around 3.6 ppm.
- A singlet for 1 hydrogen atom (1H) around 2.5 ppm.
These signals suggest the presence of aromatic protons, methylene groups, and possibly a hydroxyl group.
### Carbon-13 Nuclear Magnetic Resonance (^13C NMR) Spectrum
The bottom section displays a ^13C NMR spectrum, which plots chemical shift (in ppm) against signal intensity. The spectrum shows several distinct peaks, indicating different carbon environments within the molecule:
- Peaks in the range of 110-140 ppm likely represent aromatic carbons.
- Peaks around 50-80 ppm could indicate carbons attached to electronegative groups, such as hydroxyl or oxygen.
This analytical information is crucial for determining the structure of this organic compound.
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