**Question 4***What type of oxygen-based functional groups may be present in the molecule, based on the IR? Can the molecule contain a/an:*- Aldehyde? No- Alcohol? No- Carboxylic acid? Yes- Ester? No- Ether? No- Ketone? No**Explanation:**Infrared (IR) spectroscopy is a technique used to identify functional groups in molecules based on their vibrational transitions. In this instance, the analysis indicates the presence of a carboxylic acid group, as identified by its characteristic absorption patterns in the IR spectrum. Other functional groups such as aldehyde, alcohol, ester, ether, and ketone do not exhibit the expected IR absorption features, leading to a negative confirmation for their presence. The image displays an infrared (IR) spectrum graph for a substance labeled "Unknown C NEAT." The x-axis represents the wavenumber in cm⁻¹ (ranging from 4000 to 450 cm⁻¹), which is inversely proportional to wavelength, while the y-axis shows the percent transmittance (%T), ranging from 45% to 102%.Key absorption peaks are labeled with their corresponding wavenumbers:- **2958.34 cm⁻¹** and **2873.37 cm⁻¹**: These peaks typically indicate C-H stretching vibrations.- **1737.03 cm⁻¹**: This peak is often associated with C=O stretching, common in carbonyl groups.- **1467.20 cm⁻¹** and **1436.10 cm⁻¹**: These peaks may correspond to bending vibrations of CH₂ groups.- **1368.59 cm⁻¹** and **1256.23 cm⁻¹**: These are characteristic of C-H bending.- **1194.38 cm⁻¹**, **1157.32 cm⁻¹**, and **1121.14 cm⁻¹**: These likely represent C-O stretching vibrations.- **1011.55 cm⁻¹**, **1100.85 cm⁻¹**, and **881.86 cm⁻¹**: These can indicate out-of-plane bending for aromatic compounds or ring structures.- **830.91 cm⁻¹**, **711.23 cm⁻¹**, and **592.08 cm⁻¹**: Peaks in this region often suggest C-H bending or wagging modes, especially in substituted rings.- **553.75 cm⁻¹**: This may indicate skeletal vibrations of the molecular structure.The graph is useful for identifying functional groups based on the IR absorption characteristics of the unknown compound.

IR (Infrared) spectroscopy is the spectroscopy that deals with the infrared region of the…

Partial Question 4 2/6 What type of oxygen-based functional groups may be present in the molecule, based on the IR? Can the molecule contain a/an: aldehyde? No alcohol? No carboxylic acid? Yes ester? No ether? No ketone? No

Partial Question 4 2/6 What type of oxygen-based functional groups may be present in the molecule, based on the IR? Can the molecule contain a/an: aldehyde? No alcohol? No carboxylic acid? Yes ester? No ether? No ketone? No

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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