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100 Transmittance %T E 4000 OH cyclobutanol 3000 ů 2-butanone OH ethyl vinyl ether 2-methyl-2-propen-1-ol 2000 1500 vavenumber cm 1 H 2-methylpropanal 1000 500

100 Transmittance %T E 4000 OH cyclobutanol 3000 ů 2-butanone OH ethyl vinyl ether 2-methyl-2-propen-1-ol 2000 1500 vavenumber cm 1 H 2-methylpropanal 1000 500

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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### IR Spectrum Analysis The diagram above depicts an Infrared (IR) spectrum, which is a graph that illustrates the IR absorbance (or transmittance) of a sample as a function of wavelength (expressed as wavenumber, cm⁻¹). This specific spectrum ranges from approximately 4000 cm⁻¹ to 500 cm⁻¹. #### Key Features: - **Transmittance (% T):** This y-axis measures how much of the IR radiation passes through the sample compared to a reference. 100% transmittance means no absorbance, and 0% means complete absorbance. - **Wavenumber (cm⁻¹):** The x-axis represents the wavenumber of the IR radiation, which is inversely related to the wavelength. Higher wavenumbers correspond to higher energies and shorter wavelengths. #### Identified Compounds: At the top of the spectrum, several chemical structures are shown, indicating potential compounds analyzed: 1. **Cyclobutanol:** An alcohol with a cyclobutane ring. 2. **2-Butanone:** A ketone with the formula CH₃-CH₂-CO-CH₃. 3. **Ethyl Vinyl Ether:** An ether with the structural formula C₂H₅-O-CH=CH₂. 4. **2-Methyl-2-propen-1-ol:** An alcohol with a double bond in its structure. 5. **2-Methylpropanal:** An aldehyde compound with the formula (CH₃)₂CH-CH=O. #### Analyzing the Spectrum: - **O–H Stretching (Alcohols):** Broad absorption around 3200-3550 cm⁻¹ indicates the presence of an alcohol. - **C=O Stretching (Ketones, Aldehydes):** Strong sharp absorption in the region of 1700-1750 cm⁻¹ typically denotes the carbonyl group. - **C–H Stretching:** Absorptions around 2850-2960 cm⁻¹ can be attributed to the C–H stretches in alkanes, alkenes, and alkynes. - **C=C Stretching:** Absorptions around 1600-1680 cm⁻¹ are characteristic of alkenes. - **C–O Stretching (Ethers):** Absorption approximately in the range 1000-1300 cm
Transcribed Image Text:### IR Spectrum Analysis The diagram above depicts an Infrared (IR) spectrum, which is a graph that illustrates the IR absorbance (or transmittance) of a sample as a function of wavelength (expressed as wavenumber, cm⁻¹). This specific spectrum ranges from approximately 4000 cm⁻¹ to 500 cm⁻¹. #### Key Features: - **Transmittance (% T):** This y-axis measures how much of the IR radiation passes through the sample compared to a reference. 100% transmittance means no absorbance, and 0% means complete absorbance. - **Wavenumber (cm⁻¹):** The x-axis represents the wavenumber of the IR radiation, which is inversely related to the wavelength. Higher wavenumbers correspond to higher energies and shorter wavelengths. #### Identified Compounds: At the top of the spectrum, several chemical structures are shown, indicating potential compounds analyzed: 1. **Cyclobutanol:** An alcohol with a cyclobutane ring. 2. **2-Butanone:** A ketone with the formula CH₃-CH₂-CO-CH₃. 3. **Ethyl Vinyl Ether:** An ether with the structural formula C₂H₅-O-CH=CH₂. 4. **2-Methyl-2-propen-1-ol:** An alcohol with a double bond in its structure. 5. **2-Methylpropanal:** An aldehyde compound with the formula (CH₃)₂CH-CH=O. #### Analyzing the Spectrum: - **O–H Stretching (Alcohols):** Broad absorption around 3200-3550 cm⁻¹ indicates the presence of an alcohol. - **C=O Stretching (Ketones, Aldehydes):** Strong sharp absorption in the region of 1700-1750 cm⁻¹ typically denotes the carbonyl group. - **C–H Stretching:** Absorptions around 2850-2960 cm⁻¹ can be attributed to the C–H stretches in alkanes, alkenes, and alkynes. - **C=C Stretching:** Absorptions around 1600-1680 cm⁻¹ are characteristic of alkenes. - **C–O Stretching (Ethers):** Absorption approximately in the range 1000-1300 cm
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