Organic Chemistry As a Second Language: Second Semester Topics
4th Edition
ISBN: 9781119110651
Author: David R. Klein
Publisher: WILEY
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Textbook Question
Chapter 2.5, Problem 2.13P
For each IR spectrum below, identify whether it is consistent with the structure of an alcohol, a
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Predict the important peaks present in the IR spectrum of the molecule shown
below.
H₂N
5. Place the letter of the spectrum next to the name of the compound that it represents.
Compound
Letter
Acetone
1,2-dichloroethane
1,1,2-trichloroethane
2,2-dimethoxypropane
1-bromopropane
2-bromopropane
Q-2.
Look at the following "C-NMR spectrum (Lower) and two DEPT spectra (C,H,CI):
131 ppm
140 130 120 110 100 90 80 70 60 s0 40 30 20 10 ppm
Label all the signals as CH,, CH,. CH or C. Put you labels in the lower
spectrum.
i)
ii)
Draw one possible structure for the compound.
Chapter 2 Solutions
Organic Chemistry As a Second Language: Second Semester Topics
Ch. 2.3 - For each of the following compounds, determine...Ch. 2.3 - For each of the following compounds, determine...Ch. 2.3 - For each of the following compounds, determine...Ch. 2.3 - For each of the following compounds, determine...Ch. 2.3 - The following compound has three carbonyl groups....Ch. 2.4 - Predict which of the following C=C bonds will...Ch. 2.4 - The C=C bond in the following compound produces an...Ch. 2.5 - For each IR spectrum below, identify whether it is...Ch. 2.5 - For each IR spectrum below, identify whether it is...Ch. 2.5 - For each IR spectrum below, identify whether it is...
Ch. 2.5 - For each IR spectrum below, identify whether it is...Ch. 2.5 - For each IR spectrum below, identify whether it is...Ch. 2.5 - For each IR spectrum below, determine whether it...Ch. 2.5 - For each IR spectrum below, determine whether it...Ch. 2.5 - For each IR spectrum below, determine whether it...Ch. 2.5 - For each IR spectrum below, determine whether it...Ch. 2.5 - For each IR spectrum below, determine whether it...Ch. 2.5 - For each IR spectrum below, determine whether it...Ch. 2.5 - For each IR spectrum below, determine whether it...Ch. 2.6 - Prob. 2.22P
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- 3. a) Draw the below structure and answer the following questions. CI CH2COCH2CH3 i. Identify the chemically equivalent protons in the structure. Explain your answer. ii. Mention how many peaks you would expect in the HNMR spectrum of the compound. Explain the position of each peak in the spectrum. iii. Mention what would be the splitting pattern of each peak with proper explanation. iv. Draw the HNMR spectrum of the compound. b) Explain why the delta/ ppm scale was introduced instead of Hz in NMR analysis with example.arrow_forwardTrue or False 1. A molecule that is "IR inactive" means that it does not produce any signal due to no vibration. 2. Infrared spectroscopic data is reported in wavenumber (cm-1) against absorbance because they have a linear relationship. 3. The signals observed from a molecule of chloropropane will have a higher wavenumber than iodopropane. 4. The signals observed from the C-C bond in an alkene will report at a higher wavenumber than the C-C bond in an alkyne.arrow_forwardJj.37.arrow_forward
- Which one of the pi bonds in the molecules shown below will produce a stronger signal in an IR spectrum? Yes, compound I produces a stronger signal because it has a larger dipole moment. O Yes, compound II produces a stronger signal because it has a larger dipole moment. No, the alkene groups produce similar signals because they have similar double bonds. O No, the alkene groups produce similar signals because they both contain a similar number of atoms.arrow_forwardIdentify the following spectra. Please find peaks are assigned on the spectrum (~5-6 peaks). Label the peaks on the spectrum and place the structure of the compound in the box on the lower left-hand corner of the spectrum (from the table below, no numbering scheme).arrow_forwardAcetyleugenol: Match the peaks to the appropriate number on the structure. A letter may correspond to more than one number. 10 11 2. 2 3. 3 44 5. 5 6. 6arrow_forward
- Can you use IR spectroscopy to differentiate between ketones and aldehydes?arrow_forward2a) Label the protons in each highlighted CH, group as homotopic, enantiotopic, or diastereotopic. Structure: Homotopic, Enantiotopic, or Diastereotopic? b) There is one structure in Question 1 that contains diastereotopic protons, leading to a higher number of signals than you originally may have expected. Circle the structure and revise (if necessary) the number of ¹H signals you expect that structure to exhibit.arrow_forwardPlease explain clearly. What is the difference and similarities between an IR for a ketone and an IR for alcohol?arrow_forward
- The DEPT-90 spectrum exhibits 6 in the 0-50 ppm region The DEPT-135 spectrum exhibits x 100 ppm region that is a positive ▾ C6 signal(s) for the CH groups: ▼ 1,2,6 ✓ in the sp2 hybridized region 100-150 C3 and C4 ▼ signal(s) (only the quaternary carbon atoms, signal(s), indicating the presence of a methylene group (CH₂) attached to an oxygen atom, are missing); there is C5 ▼ C1 and C2 ▼ and signal(s) in the 50-arrow_forwardEach of the IR spectra below corresponds to one of the aromatic compounds listed below. Determine the molecule that corresponds to each spectrum.arrow_forwarddon't use handwriting 1. MORONS 20 The IR spectrum above indicates the presence of which of the following bond types or functional groups in the molecule? Select two. 100 90 70 40 4000 3000 Wavenumber (em') 2000 1000 The IR spectrum above indicates the presence of which of the following bond types or functional groups in the molecule? Select two. select two for each picture alcohol alkyne aldehyde or ketone carbonyl primary amine secondary amine carboxylić acid nitrile sp2 C-Harrow_forward
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