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**Infrared Absorption in Functional Group Regions for Various Compounds** **Question 4:** What are the major IR absorptions in the functional group region for each compound? **Compounds:** a) This structure shows a long-chain hydrocarbon. b) The structure features a cyclohexanol ring with an -OH group attached, indicating the presence of alcohol functional groups. c) This structure is a linear alkene, likely with carbon-carbon double bonds present. d) The structure presents a cyclohexanone, indicating the presence of a carbonyl group (C=O). e) This is the structure of capsaicin, identified by several functional groups: - Methoxy group (CH₃O) - Hydroxyl group (OH) - Amide linkage (C=O next to NH) **Spectral Analysis:** Each compound will exhibit distinct IR absorptions based on its functional groups: - **Hydrocarbons** generally show C-H stretching vibrations in the region of 2850-2960 cm⁻¹. - **Alcohols** like cyclohexanol will show broad O-H stretching around 3200-3550 cm⁻¹. - **Alkenes** will display C=C stretching absorptions near 1620-1680 cm⁻¹. - **Carbonyl Groups** (in cyclohexanone) show strong C=O stretching absorptions between 1700-1750 cm⁻¹. - **Capsaicin** will have multiple absorptions: O-H stretches around 3200-3550 cm⁻¹, C=O stretches near 1650-1750 cm⁻¹, and possibly -NH stretches around 3300-3500 cm⁻¹. Understanding these absorptions helps in identifying functional groups and analyzing the molecular structure.

**Infrared Absorption in Functional Group Regions for Various Compounds** **Question 4:** What are the major IR absorptions in the functional group region for each compound? **Compounds:** a) This structure shows a long-chain hydrocarbon. b) The structure features a cyclohexanol ring with an -OH group attached, indicating the presence of alcohol functional groups. c) This structure is a linear alkene, likely with carbon-carbon double bonds present. d) The structure presents a cyclohexanone, indicating the presence of a carbonyl group (C=O). e) This is the structure of capsaicin, identified by several functional groups: - Methoxy group (CH₃O) - Hydroxyl group (OH) - Amide linkage (C=O next to NH) **Spectral Analysis:** Each compound will exhibit distinct IR absorptions based on its functional groups: - **Hydrocarbons** generally show C-H stretching vibrations in the region of 2850-2960 cm⁻¹. - **Alcohols** like cyclohexanol will show broad O-H stretching around 3200-3550 cm⁻¹. - **Alkenes** will display C=C stretching absorptions near 1620-1680 cm⁻¹. - **Carbonyl Groups** (in cyclohexanone) show strong C=O stretching absorptions between 1700-1750 cm⁻¹. - **Capsaicin** will have multiple absorptions: O-H stretches around 3200-3550 cm⁻¹, C=O stretches near 1650-1750 cm⁻¹, and possibly -NH stretches around 3300-3500 cm⁻¹. Understanding these absorptions helps in identifying functional groups and analyzing the molecular structure.

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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**Infrared Absorption in Functional Group Regions for Various Compounds** **Question 4:** What are the major IR absorptions in the functional group region for each compound? **Compounds:** a) This structure shows a long-chain hydrocarbon. b) The structure features a cyclohexanol ring with an -OH group attached, indicating the presence of alcohol functional groups. c) This structure is a linear alkene, likely with carbon-carbon double bonds present. d) The structure presents a cyclohexanone, indicating the presence of a carbonyl group (C=O). e) This is the structure of capsaicin, identified by several functional groups: - Methoxy group (CH₃O) - Hydroxyl group (OH) - Amide linkage (C=O next to NH) **Spectral Analysis:** Each compound will exhibit distinct IR absorptions based on its functional groups: - **Hydrocarbons** generally show C-H stretching vibrations in the region of 2850-2960 cm⁻¹. - **Alcohols** like cyclohexanol will show broad O-H stretching around 3200-3550 cm⁻¹. - **Alkenes** will display C=C stretching absorptions near 1620-1680 cm⁻¹. - **Carbonyl Groups** (in cyclohexanone) show strong C=O stretching absorptions between 1700-1750 cm⁻¹. - **Capsaicin** will have multiple absorptions: O-H stretches around 3200-3550 cm⁻¹, C=O stretches near 1650-1750 cm⁻¹, and possibly -NH stretches around 3300-3500 cm⁻¹. Understanding these absorptions helps in identifying functional groups and analyzing the molecular structure.
Transcribed Image Text:**Infrared Absorption in Functional Group Regions for Various Compounds** **Question 4:** What are the major IR absorptions in the functional group region for each compound? **Compounds:** a) This structure shows a long-chain hydrocarbon. b) The structure features a cyclohexanol ring with an -OH group attached, indicating the presence of alcohol functional groups. c) This structure is a linear alkene, likely with carbon-carbon double bonds present. d) The structure presents a cyclohexanone, indicating the presence of a carbonyl group (C=O). e) This is the structure of capsaicin, identified by several functional groups: - Methoxy group (CH₃O) - Hydroxyl group (OH) - Amide linkage (C=O next to NH) **Spectral Analysis:** Each compound will exhibit distinct IR absorptions based on its functional groups: - **Hydrocarbons** generally show C-H stretching vibrations in the region of 2850-2960 cm⁻¹. - **Alcohols** like cyclohexanol will show broad O-H stretching around 3200-3550 cm⁻¹. - **Alkenes** will display C=C stretching absorptions near 1620-1680 cm⁻¹. - **Carbonyl Groups** (in cyclohexanone) show strong C=O stretching absorptions between 1700-1750 cm⁻¹. - **Capsaicin** will have multiple absorptions: O-H stretches around 3200-3550 cm⁻¹, C=O stretches near 1650-1750 cm⁻¹, and possibly -NH stretches around 3300-3500 cm⁻¹. Understanding these absorptions helps in identifying functional groups and analyzing the molecular structure.
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