3B. There is no IR question for this module. Below are the ¹H NMR spectrum of 1-chlorobutane, 2-methyl- 2-propanol, and 2-bromo-2-methylpropane. Identify the compound corresponding to each ¹H NMR spectrum and draw the structure next to the ¹H NMR spectrum. Assign ALL peaks in each of the three ¹H NMR spectra.
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).
Explanation/Answer cannot be hand-drawn! Must be typed or illustrated digitally
- **Chemical Shifts (δ in ppm):**
- ~1.25 ppm (single peak)
- **Possible Assignments:**
- Peak around ~1.25 ppm likely indicates a high level of symmetry and the presence of numerous equivalent hydrogen atoms in the molecule.
#### Spectrum 2:
- **Chemical Shifts (δ in ppm):**
- ~1.0 ppm (major peak)
- ~3.5 ppm (small peak)
- **Possible Assignments:**
- The peak around ~1.0 ppm suggests high symmetry with equivalent hydrogen atoms.
- The smaller peak around ~3.5 ppm indicates the presence of a deshielded proton, typically near an electronegative atom such as oxygen or halogen.
#### Spectrum 3:
- **Chemical Shifts (δ in ppm):**
- ~4.0 ppm (triplet)
- ~2.5 ppm (multiplet)
- ~1.5 ppm (multiplet)
- ~1.0 ppm (quartet)
- **Possible Assignments:**
- Multiple peaks suggest a complex structure with various environments for hydrogens.
- Presence of triplet, quartet, and multiple multiplets implies chemically distinct hydrogen atom groupings with different adjacent atoms.
### Steps to Identify Compounds:
1. **1-Chlorobutane:**
- Expected \( ^1H \) NMR Characteristics:
- Peaks corresponding to CH2 near 3.4 ppm (due to Cl).
- Other peaks split typically for butane structure.
2. **2-Methyl-2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffb9b51b7-8e30-472f-a9b1-c9ee115779d7%2Fef266b4c-04b5-48fc-9f3b-4887bd09e147%2F46pajcv_processed.png&w=3840&q=75)
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