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Match a structure with the correct ¹H-NMR. You will, of course, notice that there are more structures than spectra, so some structures are not represented. Also, notice that you are not given integration information... that is not a mistake! Simply fill in the blank with the product number (i.e. 1, 2, 3, etc.). Product 1 Product 4 OH Product 2 xi Product 3 مینه لا Product 5 Product 6

Match a structure with the correct ¹H-NMR. You will, of course, notice that there are more structures than spectra, so some structures are not represented. Also, notice that you are not given integration information... that is not a mistake! Simply fill in the blank with the product number (i.e. 1, 2, 3, etc.). Product 1 Product 4 OH Product 2 xi Product 3 مینه لا Product 5 Product 6

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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# Instruction on Using Spectroscopy for Chemical Analysis ## Guidelines for Answering Questions 1. **READ THE DIRECTIONS TO EACH QUESTION CAREFULLY**: Failing to follow directions may result in incorrect answers! 2. **FORMAT YOUR ANSWERS AS DIRECTED**: Incorrect formatting will be marked as wrong! ## Spectroscopy Reference Tables Below are the IR regions and NMR chemical shifts tables that will assist you in solving spectroscopy problems: ### 1H NMR (Proton Nuclear Magnetic Resonance) Chemical Shifts The horizontal axis of the NMR spectrum is measured in parts per million (ppm). Different functional groups give rise to signals in specific regions: - **12-10 ppm**: Carboxylic acids (R-COOH) - **10-9 ppm**: Aldehydes (R-CHO) - **8-6 ppm**: Aromatics like benzene rings (C₆H₅-H) - **6-4.5 ppm**: Vinylic protons (H-C=CH) - **5.5-4 ppm**: Hydroxy (OH) and Amino (NH) groups - **4.5-3 ppm**: Electronegative atoms attached (H-C-X where X = F, Cl, Br) - **4-2.5 ppm**: Alkoxy protons (H-C-O) - **3-2 ppm**: Alkynes (H-C≡C) - **3-2.5 ppm**: Aliphatic amines (H-C-N) - **2.5-1 ppm**: Methyl and methylene groups attached to heteroatoms or carbonyls (H-C-CH₃, H₂-C=O) - **1-0.5 ppm**: Simple aliphatic hydrocarbons (e.g., CH₃, CH₂) ### IR (Infrared) Spectroscopy Absorption Regions The horizontal axis of the IR spectrum is measured in wavenumbers (cm⁻¹). Key absorptions for various functional groups: - **4000-3200 cm^-1**: - Free O-H stretch: **3700 cm^-1** - N-H stretch: **3500-3300 cm^-1** - ≡C-H stretch: **3400–3200 cm^-1** - **3000-2850 cm^-1**:
Transcribed Image Text:# Instruction on Using Spectroscopy for Chemical Analysis ## Guidelines for Answering Questions 1. **READ THE DIRECTIONS TO EACH QUESTION CAREFULLY**: Failing to follow directions may result in incorrect answers! 2. **FORMAT YOUR ANSWERS AS DIRECTED**: Incorrect formatting will be marked as wrong! ## Spectroscopy Reference Tables Below are the IR regions and NMR chemical shifts tables that will assist you in solving spectroscopy problems: ### 1H NMR (Proton Nuclear Magnetic Resonance) Chemical Shifts The horizontal axis of the NMR spectrum is measured in parts per million (ppm). Different functional groups give rise to signals in specific regions: - **12-10 ppm**: Carboxylic acids (R-COOH) - **10-9 ppm**: Aldehydes (R-CHO) - **8-6 ppm**: Aromatics like benzene rings (C₆H₅-H) - **6-4.5 ppm**: Vinylic protons (H-C=CH) - **5.5-4 ppm**: Hydroxy (OH) and Amino (NH) groups - **4.5-3 ppm**: Electronegative atoms attached (H-C-X where X = F, Cl, Br) - **4-2.5 ppm**: Alkoxy protons (H-C-O) - **3-2 ppm**: Alkynes (H-C≡C) - **3-2.5 ppm**: Aliphatic amines (H-C-N) - **2.5-1 ppm**: Methyl and methylene groups attached to heteroatoms or carbonyls (H-C-CH₃, H₂-C=O) - **1-0.5 ppm**: Simple aliphatic hydrocarbons (e.g., CH₃, CH₂) ### IR (Infrared) Spectroscopy Absorption Regions The horizontal axis of the IR spectrum is measured in wavenumbers (cm⁻¹). Key absorptions for various functional groups: - **4000-3200 cm^-1**: - Free O-H stretch: **3700 cm^-1** - N-H stretch: **3500-3300 cm^-1** - ≡C-H stretch: **3400–3200 cm^-1** - **3000-2850 cm^-1**:
--- ### Matching Structures to ¹H-NMR Spectra #### Introduction Match a structure with the correct ¹H-NMR spectrum. Notice that there are more structures than spectra, so some structures are not represented. Also, notice that you are not given integration information...that is not a mistake! Simply fill in the blank with the product number (i.e., 1, 2, 3, etc.). #### Structures: 1. **Product 1** - ![Product 1](https://www.example.com/product1.png) 2. **Product 2** - ![Product 2](https://www.example.com/product2.png) 3. **Product 3** - ![Product 3](https://www.example.com/product3.png) 4. **Product 4** - ![Product 4](https://www.example.com/product4.png) 5. **Product 5** - ![Product 5](https://www.example.com/product5.png) 6. **Product 6** - ![Product 6](https://www.example.com/product6.png) #### NMR Spectra: ##### Spectrum a: ![Spectrum a](https://www.example.com/spectrum_a.png) - **PPM Ranges:** - Peaks at approximately 1.2, 2.2, and 3.8 ppm. **Part a Answer:** _______ ##### Spectrum b: ![Spectrum b](https://www.example.com/spectrum_b.png) - **PPM Ranges:** - Peaks at approximately 1.1, 1.3, 2.0, and 2.8 ppm. **Part b Answer:** _______ ##### Spectrum c: ![Spectrum c](https://www.example.com/spectrum_c.png) - **PPM Ranges:** - Peaks at approximately 0.9, and 1.2 ppm. **Part c Answer:** _______ --- Fill in the appropriate product number for each given spectrum based on the ¹H-NMR data provided. This exercise will help you understand the identification of organic compounds using nuclear magnetic resonance spectroscopy. ---
Transcribed Image Text:--- ### Matching Structures to ¹H-NMR Spectra #### Introduction Match a structure with the correct ¹H-NMR spectrum. Notice that there are more structures than spectra, so some structures are not represented. Also, notice that you are not given integration information...that is not a mistake! Simply fill in the blank with the product number (i.e., 1, 2, 3, etc.). #### Structures: 1. **Product 1** - ![Product 1](https://www.example.com/product1.png) 2. **Product 2** - ![Product 2](https://www.example.com/product2.png) 3. **Product 3** - ![Product 3](https://www.example.com/product3.png) 4. **Product 4** - ![Product 4](https://www.example.com/product4.png) 5. **Product 5** - ![Product 5](https://www.example.com/product5.png) 6. **Product 6** - ![Product 6](https://www.example.com/product6.png) #### NMR Spectra: ##### Spectrum a: ![Spectrum a](https://www.example.com/spectrum_a.png) - **PPM Ranges:** - Peaks at approximately 1.2, 2.2, and 3.8 ppm. **Part a Answer:** _______ ##### Spectrum b: ![Spectrum b](https://www.example.com/spectrum_b.png) - **PPM Ranges:** - Peaks at approximately 1.1, 1.3, 2.0, and 2.8 ppm. **Part b Answer:** _______ ##### Spectrum c: ![Spectrum c](https://www.example.com/spectrum_c.png) - **PPM Ranges:** - Peaks at approximately 0.9, and 1.2 ppm. **Part c Answer:** _______ --- Fill in the appropriate product number for each given spectrum based on the ¹H-NMR data provided. This exercise will help you understand the identification of organic compounds using nuclear magnetic resonance spectroscopy. ---
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