a. An oxygen-containing compound shows an absorption band at ~1700 cm-1 and no absorption bands at ~3300 cm-1, ~2700 cm-1, or ~1100 cm-1. What class of compound is it? b. A nitrogen-containing compound shows no absorption band at ~3400 cm-1 and no absorption bands between ~1700 cm-1 and ~1600 cm-1 or between 2260 cm-1 and 2220 cm-1. What class of compound is it?

a. An oxygen-containing compound shows an absorption band at ~1700 cm-1 and no absorption bands at ~3300 cm-1, ~2700 cm-1, or ~1100 cm-1. What class of compound is it? b. A nitrogen-containing compound shows no absorption band at ~3400 cm-1 and no absorption bands between ~1700 cm-1 and ~1600 cm-1 or between 2260 cm-1 and 2220 cm-1. What class of compound is it?

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter13: Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Section13.SE: Something Extra

Problem 31AP: When measured on a spectrometer operating at 200 MHz, chloroform (CHCl3) shows a single sharp...

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An oxygen-containing compound shows an absorption band at ~1700 cm-1 and no absorption bands at ~3300 cm-1, ~2700 cm-1 , or ~1100 cm-1 . What class of compound is it?
A nitrogen-containing compound shows no absorption band at ~3400 cm-1 and no absorption bands between ~1700 cm-1 and ~1600 cm-1 or between 2260 cm-1 and 2220 cm-1. What class of compound is it?
Propose a structure consistent with each set of data.a.) C9H10O2: IR absorption at 1718 cm−1 b.) C9H12: IR absorption at 2850–3150 cm−1
1. An aliphatic ketone absorbs at 1,715 cm-1. What is the frequency of this vibration in hertz, which is cycles per second or just per second, reciprocal seconds? 2. What is the energy equivalent of this stretching vibration in kcal/mole? 3. Why does 3,4-diethyl-3-hexene not have a carbon to carbon double bond stretching absorption band? 4. Why does a carbon to oxygen double bond absorption band have a greater intensity than a carbon to carbon double bond absorption band? 5. Using only IR, explain in detail how one could most easily differentiate between oct-1-ene and oct-1-yne if all carbon to carbon bonds are ignored. 6. Using only IR, explain in detail how one could most easily differentiate between butan-1-ol and butanoic acid.
Propose a structure consistent with each set of data. a.C9H10O2: IR absorption at 1718 cm−1b.C9H12: IR absorption at 2850–3150 cm−1
Which of the following compounds will show two absorption bands at around 3300 cm-1 and around 2150 cm-¹?
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1. True or False a. UV-Vis spectroscopy normally reports data in the from of bands rather than single peaks because of overlapping electronic transitions that are being recorded by the detector. (T/F) b. When using linear regression to translate absorption data using Beer's Law, the y-intercept (+b) of the linear equation represents the path length. (T/F) c. Phosphorescent materials give a glowing effect because the electrons remain at an excited state for much longer, which is the cause for the "glow". (T/F)
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When measured on a spectrometer operating at 200 MHz, chloroform (CHCl3) shows a single sharp absorption at 7.3 Î´. (a) How many parts per million downfield from TMS does chloroform absorb? (b) How many hertz downfield from TMS would chloroform absorb if the measurement were carried out on a spectrometer operating at 360 MHz? (c) What would be the position of the chloroform absorption in Î´ units when measured on a 360 MHz spectrometer?
Would you expect two diastereomers such as meso-2, 3-dibromobutane and (2R, 3R)-dibromobutane to have identical or different IR spectra? Explain.
Explain the order of chemical shifts of the carbon atoms in the 13C spectra of cyclohexanone (fig 22.6 ) and adipic acid (fig .22.9) attached below .