1276.94

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
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Isopentyl Acetate (Banana Oil)- IR Spectrum

I need help in assigning the following IR peaks: alkane C–H stretch, C=O stretch, alkane CH2 bend, and C–O stretch. Thanks.

The image displays an infrared (IR) spectroscopy graph with the following details:

- **X-axis**: Wavenumbers (cm⁻¹), ranging from 4000 to 500.
- **Y-axis**: % Transmittance, ranging from 0 to 100%.

### Key Peaks:
1. **Peak at 3318.54 cm⁻¹**: Indicates a strong absorbance, likely related to O-H or N-H stretching, typical in alcohols or amines.
2. **Peak at 1636.85 cm⁻¹**: Could be associated with C=C stretching found in alkenes, or possibly C=O stretching in amides or ketones.
3. **Peak at 1276.94 cm⁻¹**: This might indicate C-O stretching of ethers or esters.

### Smaller Peaks:
- Observations at **423.99, 526.36, 471.07, 404.17 cm⁻¹**: Smaller peaks that may represent various bending vibrations, often seen in fingerprint regions unique to specific compounds.

### Analysis:
This IR spectrum profile helps identify functional groups present in a compound by analyzing the unique energy absorbed by molecular bonds. Such information is crucial for characterizing chemical substances in research and industry.
Transcribed Image Text:The image displays an infrared (IR) spectroscopy graph with the following details: - **X-axis**: Wavenumbers (cm⁻¹), ranging from 4000 to 500. - **Y-axis**: % Transmittance, ranging from 0 to 100%. ### Key Peaks: 1. **Peak at 3318.54 cm⁻¹**: Indicates a strong absorbance, likely related to O-H or N-H stretching, typical in alcohols or amines. 2. **Peak at 1636.85 cm⁻¹**: Could be associated with C=C stretching found in alkenes, or possibly C=O stretching in amides or ketones. 3. **Peak at 1276.94 cm⁻¹**: This might indicate C-O stretching of ethers or esters. ### Smaller Peaks: - Observations at **423.99, 526.36, 471.07, 404.17 cm⁻¹**: Smaller peaks that may represent various bending vibrations, often seen in fingerprint regions unique to specific compounds. ### Analysis: This IR spectrum profile helps identify functional groups present in a compound by analyzing the unique energy absorbed by molecular bonds. Such information is crucial for characterizing chemical substances in research and industry.
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