A compound containing one functional group has IR absorption bands at 3300 cm1 (strong, sharp) and 2150 cm¯1. Which substance best matches this information? A) hexan-2-one B) hexan-3-ol C) hex-1-ene D) hexane E) hex-1-yne
A compound containing one functional group has IR absorption bands at 3300 cm1 (strong, sharp) and 2150 cm¯1. Which substance best matches this information? A) hexan-2-one B) hexan-3-ol C) hex-1-ene D) hexane E) hex-1-yne
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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Transcribed Image Text:### Infrared (IR) Spectroscopy and Functional Groups
**Problem Statement:**
A compound containing one functional group has IR absorption bands at 3300 cm⁻¹ (strong, sharp) and 2150 cm⁻¹. Which substance best matches this information?
**Options:**
A) hexan-2-one
B) hexan-3-ol
C) hex-1-ene
D) hexane
E) hex-1-yne
**Explanation:**
- **IR Absorption Bands:**
- **3300 cm⁻¹ (strong, sharp):** This band is typically associated with the stretching vibration of an alkyne C-H bond or an N-H bond.
- **2150 cm⁻¹:** This band commonly matches the C≡C stretching of an alkyne triple bond or C≡N triple bond.
**Correct Answer:**
E) hex-1-yne
The IR absorption at both 3300 cm⁻¹ and 2150 cm⁻¹ aligns with the presence of a terminal alkyne, such as hex-1-yne.
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