ORGANIC CHEMISTRY
8th Edition
ISBN: 9781323815427
Author: Bruice
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Question
Chapter 13, Problem 68P
Interpretation Introduction
Interpretation:
The reason should be explained for the stretching vibration of C-H bonds occur at larger wave number.
Concept introduction:
Wave number
Wave number is the spatial frequency of a wave, measured in cycles per unit distance or radians per unit distance.
Wave number can be calculated by following formula,
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Given that the force constants are similar for C - H and C - C bonds, explain why the stretching vibration of a C - H bond occurs at a larger wavenumber.
1. Arrange the following in decreasing order of stretching vibration frequency.A. C = S, C = N, C = C, C=O B. C- H, N-H, O-H C. How many vibrational degrees of freedom does a chloroform (CHCl3) molecule possess?
2. What are some of the factors that can make interpreting IR spectra more difficult and that should be considered to avoid band misinterpretation?
This question pertains to vibrational spectroscopy.
Which of the following molecules would have a pure vibrational spectrum and why? HCl, CO2, N2, H2O
What is the selection rule for vibrational spectroscopy?
The wavenumber of the fundamental vibrational transition of Cl2 is 565 cm-1. Calculate the force constant of the bond.
Chapter 13 Solutions
ORGANIC CHEMISTRY
Ch. 13.1 - Which of the following fragments produced in a...Ch. 13.2 - What distinguishes the mass spectrum of...Ch. 13.2 - What is the most likely m/z value for the base...Ch. 13.3 - Prob. 5PCh. 13.3 - a. Suggest possible molecular formulas for a...Ch. 13.3 - If a compound has a molecular ion with an...Ch. 13.3 - Identify the hydrocarbon that has a molecular ion...Ch. 13.4 - Predict the relative intensities of the molecular...Ch. 13.5 - Which molecular formula has an exact molecular...Ch. 13.5 - Prob. 11P
Ch. 13.6 - Sketch the mass spectrum expected for...Ch. 13.6 - The mass spectra of 1-methoxybutane,...Ch. 13.6 - Primary alcohols have a strong peak at m/z = 31....Ch. 13.6 - Identify the ketones responsible for the mass...Ch. 13.6 - Prob. 16PCh. 13.6 - Using curved arrows, show the principal fragments...Ch. 13.6 - The reaction of (Z)-2-pentene with water and a...Ch. 13.9 - a. Which is higher in energy: electromagnetic...Ch. 13.9 - Prob. 20PCh. 13.13 - Prob. 21PCh. 13.14 - Which occur at a larger wavenumber: a. the C O...Ch. 13.14 - Prob. 23PCh. 13.14 - Prob. 24PCh. 13.14 - Rank the following compounds from highest...Ch. 13.14 - Which shows an O H stretch at a larger...Ch. 13.16 - Prob. 27PCh. 13.16 - a. An oxygen-containing compound shows an...Ch. 13.16 - Prob. 29PCh. 13.16 - For each of the following pair of compounds, name...Ch. 13.17 - Which of the following compounds has a vibration...Ch. 13.17 - Prob. 32PCh. 13.18 - A compound with molecular formula C4H6O gives the...Ch. 13.20 - Prob. 34PCh. 13.20 - Prob. 35PCh. 13.21 - Predict the max of the following compound:Ch. 13.21 - Prob. 37PCh. 13.23 - a. At pH = 7 one of the ions shown here is purple...Ch. 13.23 - Prob. 39PCh. 13.23 - Prob. 40PCh. 13 - In the mass spectrum of the following compounds,...Ch. 13 - Prob. 42PCh. 13 - Draw structures for a saturated hydrocarbon that...Ch. 13 - Rank the following compounds in order of...Ch. 13 - For each of the following pairs of compounds,...Ch. 13 - a. How could you use IR spectroscopy to determine...Ch. 13 - Assuming that the force constant is approximately...Ch. 13 - Norlutin and Enovid are ketones that suppress so...Ch. 13 - In the following boxes, list the types of bonds...Ch. 13 - A mass spectrum shows significant peaks at m/z. =...Ch. 13 - Prob. 51PCh. 13 - Prob. 52PCh. 13 - Prob. 53PCh. 13 - The IR spectrum of a compound with molecular...Ch. 13 - Rank the following compounds from highest...Ch. 13 - Rank the following compounds from highest...Ch. 13 - What peaks in their mass spectra can be used to...Ch. 13 - Prob. 58PCh. 13 - Which one of the following five compounds produced...Ch. 13 - Prob. 60PCh. 13 - Each of the IR spectra shown below is accompanied...Ch. 13 - Prob. 62PCh. 13 - Prob. 63PCh. 13 - How can IR spectroscopy distinguish between...Ch. 13 - Prob. 65PCh. 13 - Prob. 66PCh. 13 - Give approximate wavenumbers for the major...Ch. 13 - Prob. 68PCh. 13 - Which one of the following live compounds produced...Ch. 13 - Phenolphthalein is an acid-base indicator. In...Ch. 13 - Prob. 71PCh. 13 - How can you use UV spectroscopy to distinguish...Ch. 13 - Prob. 73PCh. 13 - The IR and mass spectra for three different...
Knowledge Booster
Similar questions
- What is the relationship between wavenumber and wavelength and how wavenumber is related to energy? Why stretching frequencies decrease from C−Cl to C−Br to C−I?arrow_forwardCould you use a compact fluorescent light (CFL) bulb to perform UV-visible absorption spectroscopy? Why/why not? Predict the maximum absorption wavelength for 2,4-heptadien-6-one using Woodward-Fieser rules.arrow_forwardWhat is the order of decreasing vibrational frequency for C — Cl, C — Br, C — C, C — O and C — H ?arrow_forward
- What would be the wavelength of the Stokes Raman shift if the C-H bond were probed with a 405 nm laser? Sketch the resulting spectra, including Rayleigh scattering – indicate wavelengths on the sketch.arrow_forwardFunctional groups such as anhydride, carboxylate (but not carboxylic acid), nitro, primary amino give two stretching vibrational bands in the infrared spectrum. What is the origin of these two bands ?arrow_forwardWhat is the vibrational wavenumber for carbon dioxide? Explain how you got this answer.arrow_forward
- All of the following are TRUE about molecular fluorescence spectroscopy, except: A. the sensitivity is one to three orders of magnitude better than absorption spectroscopy. B. the radiant power of fluorescence is proportional to the radiant power of the excitation beam absorbed. C. small linear concentration range. D. the absorption spectrum and the fluorescence spectrum for a compound often appears as approximate mirror images.arrow_forwardThe H-Cl stretching frequency occurs at approximately 2870 cm-1. If the hydrogen is substituted with a deuterium, predict approximately the absorption wavenumber of the DCl stretch.arrow_forwardIf chloroform (trichloromethane) exhibits an infrared peak at 3018cm−1 due to C–H stretching vibration, calculate wavenumber of the absorption band corresponding to C–D stretching vibration in deuterochloroform (experimental value 2253cm−1).arrow_forward
- state which of the following molecules show a pure rational microwave absorption spectrum and explain why (a) H2O (b) CO2 (c) NH3 (d) N2O (e) Benzene (f) Cl2arrow_forwardThe vibrational frequencies for the mixture of gases shown in the Chapter 3 Connection to Instrumental Analysis include: H2 (4160 cm-1) N2 (2331 cm-1) CO (2143 cm-1), and O2 (1550 cm-1). What can you conclude about the bond orders by inspection? Calculate the force constants for each molecule to check the accuracy of your estimate.arrow_forwardThe force constant for the carbon-carbon stretching mode in acetylene is 1.5 x 106 dynes/cm. Calculate the frequency (in cm-1) for the carbon-carbon stretching mode of acetylene.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,
Principles of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage Learning
Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
Physical Chemistry
Chemistry
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Wadsworth Cengage Learning,
Principles of Modern Chemistry
Chemistry
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:Cengage Learning
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning