4.) a.) Given that the condensed molecular formula for the following compound, CSH120, predict the bonds you would expect this molecule to have based on the given IR spectrum. Draw arrows to the peaks with the bond(s) they represent. b.) Based on your findings from the IR spectrum, propose 3 different constitutional isomers that are consistent with your findings.
Analyzing Infrared Spectra
The electromagnetic radiation or frequency is classified into radio-waves, micro-waves, infrared, visible, ultraviolet, X-rays and gamma rays. The infrared spectra emission refers to the portion between the visible and the microwave areas of electromagnetic spectrum. This spectral area is usually divided into three parts, near infrared (14,290 – 4000 cm-1), mid infrared (4000 – 400 cm-1), and far infrared (700 – 200 cm-1), respectively. The number set is the number of the wave (cm-1).
IR Spectrum Of Cyclohexanone
It is the analysis of the structure of cyclohexaone using IR data interpretation.
IR Spectrum Of Anisole
Interpretation of anisole using IR spectrum obtained from IR analysis.
IR Spectroscopy
Infrared (IR) or vibrational spectroscopy is a method used for analyzing the particle's vibratory transformations. This is one of the very popular spectroscopic approaches employed by inorganic as well as organic laboratories because it is helpful in evaluating and distinguishing the frameworks of the molecules. The infra-red spectroscopy process or procedure is carried out using a tool called an infrared spectrometer to obtain an infrared spectral (or spectrophotometer).
![### Infrared Spectroscopy Analysis of the Compound C\(_5\)H\(_{12}\)O
**Question 4:**
**a)** Given that the condensed molecular formula for the following compound is C\(_5\)H\(_{12}\)O, predict the bonds you would expect this molecule to have based on the given IR spectrum. Draw arrows to the peaks with the bond(s) they represent.
**b)** Based on your findings from the IR spectrum, propose 3 different constitutional isomers that are consistent with your findings.
#### IR Spectrum Description
The infrared (IR) spectrum graph shows the intensity of absorption (Y-axis) as a function of wavenumber (X-axis) in cm\(^{-1}\). The analysis can identify functional groups within a molecule based on their characteristic absorption frequencies.
##### Key Observed Peaks:
1. **Broad peak around 3346 cm\(^{-1}\)**
- **Interpretation**: This is indicative of an O-H stretching vibration, which suggests the presence of an alcohol (OH group).
2. **Sharp peaks around 3000 cm\(^{-1}\)**
- **Interpretation**: These peaks are typical of C-H stretching vibrations, suggesting the presence of C-H bonds which are expected in alkyl groups (CH\(_3\), CH\(_2\), CH).
3. **Peaks around 1465-1390 cm\(^{-1}\)**
- **Interpretation**: These peaks could correspond to C-H bending vibrations (methyl or methylene groups).
##### Summary:
Based on the IR spectrum, the significant broad peak around 3346 cm\(^{-1}\) for O-H stretching indicates the presence of an alcohol functional group. The absorptions around 3000 cm\(^{-1}\) imply the presence of alkane C-H bonds.
#### Proposed Constitutional Isomers:
Considering the molecular formula C\(_5\)H\(_{12}\)O and the identified functional groups, three possible isomers are:
1. **1-Pentanol** \(\mathbf{CH_3(CH_2)_4OH}\)
2. **2-Pentanol** \(\mathbf{CH_3CH(OH)CH_2CH_2CH_3}\)
3. **3-Pentanol** \(\mathbf{CH_3CH_2CH(OH)CH_2CH_](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F86fb4fea-474a-4bf3-af54-6f23562d8d8b%2F37f27723-c323-47a5-a642-a3967580bdfb%2Fbmplqw9_processed.jpeg&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 4 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781259911156/9781259911156_smallCoverImage.gif)
![Principles of Instrumental Analysis](https://www.bartleby.com/isbn_cover_images/9781305577213/9781305577213_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781259911156/9781259911156_smallCoverImage.gif)
![Principles of Instrumental Analysis](https://www.bartleby.com/isbn_cover_images/9781305577213/9781305577213_smallCoverImage.gif)
![Organic Chemistry](https://www.bartleby.com/isbn_cover_images/9780078021558/9780078021558_smallCoverImage.gif)
![Chemistry: Principles and Reactions](https://www.bartleby.com/isbn_cover_images/9781305079373/9781305079373_smallCoverImage.gif)
![Elementary Principles of Chemical Processes, Bind…](https://www.bartleby.com/isbn_cover_images/9781118431221/9781118431221_smallCoverImage.gif)