Explanation Changing the dipole moment: The most important factor that influence the intensity of an absorption band is the change in dipole moment that occurs during vibration, for example an aldehyde (C=O) stretch usually occurs near 1730 cm -1 and alkane (C=C) stretch usually occurs near 1650 cm -1 . The (C=O) stretch is much more intense than the (C=C) stretch, the carbonyl (C=O) bond is highly polar, so dipole moment changes considered as the bond stretches. The number of absorption band: We consider the (C=C) absorption in 2,3-dimethyldut-2-ene is not detectable. Further the (C=C) bond is non-polar and the molecule is symmetrical, so there is no change in dipole moment during the change...

8th Edition

ISBN: 9781323815427

Author: Bruice

Publisher: PEARSON

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Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 13, Problem 42P

Interpretation Introduction

Interpretation:

The three factors that influence of the intensity of an IR absorption band has to be lsued.

Expert Solution & Answer

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. 5P Ch. 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. 16P Ch. 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. 20P Ch. 13.13 - Prob. 21P Ch. 13.14 - Which occur at a larger wavenumber: a. the C O...Ch. 13.14 - Prob. 23P Ch. 13.14 - Prob. 24P Ch. 13.14 - Rank the following compounds from highest...Ch. 13.14 - Which shows an O H stretch at a larger...Ch. 13.16 - Prob. 27P Ch. 13.16 - a. An oxygen-containing compound shows an...Ch. 13.16 - Prob. 29P Ch. 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. 32P Ch. 13.18 - A compound with molecular formula C4H6O gives the...Ch. 13.20 - Prob. 34P Ch. 13.20 - Prob. 35P Ch. 13.21 - Predict the max of the following compound:Ch. 13.21 - Prob. 37P Ch. 13.23 - a. At pH = 7 one of the ions shown here is purple...Ch. 13.23 - Prob. 39P Ch. 13.23 - Prob. 40P Ch. 13 - In the mass spectrum of the following compounds,...Ch. 13 - Prob. 42P Ch. 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. 51P Ch. 13 - Prob. 52P Ch. 13 - Prob. 53P Ch. 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. 58P Ch. 13 - Which one of the following five compounds produced...Ch. 13 - Prob. 60P Ch. 13 - Each of the IR spectra shown below is accompanied...Ch. 13 - Prob. 62P Ch. 13 - Prob. 63P Ch. 13 - How can IR spectroscopy distinguish between...Ch. 13 - Prob. 65P Ch. 13 - Prob. 66P Ch. 13 - Give approximate wavenumbers for the major...Ch. 13 - Prob. 68P Ch. 13 - Which one of the following live compounds produced...Ch. 13 - Phenolphthalein is an acid-base indicator. In...Ch. 13 - Prob. 71P Ch. 13 - How can you use UV spectroscopy to distinguish...Ch. 13 - Prob. 73P Ch. 13 - The IR and mass spectra for three different...

Knowledge Booster

The three factors that influence of the intensity of an IR absorption band has to be lsued.

Solution Summary: The author explains the three factors that influence the intensity of an IR absorption band.

Interpretation: The three factors that influence of the intensity of an IR absorption band has to be lsued.

Chapter 13 Solutions

Interpretation:

The three factors that influence of the intensity of an IR absorption band has to be lsued.