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1ee se 40 20 4aee 3e00 2sa NVENUMBERS 35aa 2eee 1saa eae.e liquid sanple betueen salt plates Capyright 1993 3H 3H 2H 2H R 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 PPM LATT S 6SRT TRANSMITTANCE

1ee se 40 20 4aee 3e00 2sa NVENUMBERS 35aa 2eee 1saa eae.e liquid sanple betueen salt plates Capyright 1993 3H 3H 2H 2H R 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 PPM LATT S 6SRT TRANSMITTANCE

Chemistry
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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Provide a structure of a compound having a molecular formula of C5H10O2 that is consistent with the following sprectra and assign peaks. 

### Infrared Spectroscopy and NMR Spectroscopy of a Liquid Sample #### Infrared (IR) Spectrum Analysis The IR spectrum displayed is a graphical representation of the sample's absorption of infrared light, resulting in the peaks observed, which indicate specific molecular bonds and functional groups within the sample. - **X-axis (Wavenumbers)**: Ranges from 4000 to 600 cm^-1. The unit of measure is in wavenumbers, which is the reciprocal of wavelength (cm^-1). - **Y-axis (% Transmittance)**: Ranges from 0 to 100%. The transmittance percentage reflects the amount of light that passes through the sample. Key peaks in the IR spectrum: 1. **2870 cm^-1**: A possible C-H stretch. 2. **1711 cm^-1**: Indicative of a carbonyl (C=O) stretching vibration. 3. **1462 cm^-1, 1381 cm^-1, 1269 cm^-1, 1177 cm^-1, 997 cm^-1**: These regions correspond to various bending vibrations and stretches of C-H, O-H, and other bonds indicative of functional groups in the sample. #### Nuclear Magnetic Resonance (NMR) Spectrum Analysis The NMR spectrum provides insights into the hydrogen environments within the molecular structure by examining the chemical shifts (δ) in parts per million (PPM) on the X-axis and the intensity of the peaks. - **X-axis (Chemical shift)**: Ranges from 4.0 to 0.5 PPM. It quantifies the resonance frequencies of the hydrogen atoms within the sample relative to a reference standard (TMS - Tetramethylsilane). - **Y-axis (Signal Intensity)**: Represents the relative number of hydrogen atoms at each chemical shift. Key peaks in the NMR spectrum: 1. **3H at ~3.5 PPM**: Suggests three hydrogen (H) atoms in a similar chemical environment, often indicative of a -CH3 group adjacent to an electronegative group like oxygen or nitrogen. 2. **2H at ~2.0 PPM**: Indicates two hydrogen atoms, possibly part of a methylene group (-CH2-) adjacent to electron-withdrawing groups or unsaturated systems. 3. **2H at ~1.3 PPM**: Similarly indicative of a methylene group in a less electronegative
Transcribed Image Text:### Infrared Spectroscopy and NMR Spectroscopy of a Liquid Sample #### Infrared (IR) Spectrum Analysis The IR spectrum displayed is a graphical representation of the sample's absorption of infrared light, resulting in the peaks observed, which indicate specific molecular bonds and functional groups within the sample. - **X-axis (Wavenumbers)**: Ranges from 4000 to 600 cm^-1. The unit of measure is in wavenumbers, which is the reciprocal of wavelength (cm^-1). - **Y-axis (% Transmittance)**: Ranges from 0 to 100%. The transmittance percentage reflects the amount of light that passes through the sample. Key peaks in the IR spectrum: 1. **2870 cm^-1**: A possible C-H stretch. 2. **1711 cm^-1**: Indicative of a carbonyl (C=O) stretching vibration. 3. **1462 cm^-1, 1381 cm^-1, 1269 cm^-1, 1177 cm^-1, 997 cm^-1**: These regions correspond to various bending vibrations and stretches of C-H, O-H, and other bonds indicative of functional groups in the sample. #### Nuclear Magnetic Resonance (NMR) Spectrum Analysis The NMR spectrum provides insights into the hydrogen environments within the molecular structure by examining the chemical shifts (δ) in parts per million (PPM) on the X-axis and the intensity of the peaks. - **X-axis (Chemical shift)**: Ranges from 4.0 to 0.5 PPM. It quantifies the resonance frequencies of the hydrogen atoms within the sample relative to a reference standard (TMS - Tetramethylsilane). - **Y-axis (Signal Intensity)**: Represents the relative number of hydrogen atoms at each chemical shift. Key peaks in the NMR spectrum: 1. **3H at ~3.5 PPM**: Suggests three hydrogen (H) atoms in a similar chemical environment, often indicative of a -CH3 group adjacent to an electronegative group like oxygen or nitrogen. 2. **2H at ~2.0 PPM**: Indicates two hydrogen atoms, possibly part of a methylene group (-CH2-) adjacent to electron-withdrawing groups or unsaturated systems. 3. **2H at ~1.3 PPM**: Similarly indicative of a methylene group in a less electronegative
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