Laboratory Techniques in Organic Chemistry
4th Edition
ISBN: 9781464134227
Author: Jerry R. Mohrig, David Alberg, Gretchen Hofmeister, Paul F. Schatz, Christina Noring Hammond
Publisher: W. H. Freeman
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Question
Chapter 24, Problem 7Q
Interpretation Introduction
Interpretation:
The molecular formula that corresponds to exact mass of 180.0422 to be determined.
Concept introduction:
Mass spectrometry is an important spectroscopic method to determine the molecular weights and molecular formulas of the compounds. It also can help in the identification of compound or determination of its structure.
A mass spectrograph is plotted between the intensity of ions on the y-axis and
- A sample is converted into a gaseous ion by an ionization technique in the mass spectrometer.
- Then on the basis of mass-to-charge
- These ions generate
electric current at the detector and a mass spectrum is formed.
To assign the molecular weights to compounds the rule of thirteen is utilized in mass spectrometry. Thirteen here is obtained by the addition of the mass of carbon and hydrogen.
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EFFICIENTS
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301.7
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5.277
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348.9
254.8
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3.041
308.6
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4.676
3.662
160.6
87.6
90148
5.086
3.677
337.7
242.5
0092
6.348
3.775
464.7
186.4
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5.081
3.908
223.5
155.8
5.558
3.861
370.5
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3.66
326.6
242.9
4.752
3.641
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317.9
216.6
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4.96
3.652
203.8
108.7
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3.767
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211.7
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143.6
AVERAGE
STDEV
COUNT
95% CI Confidence Interval (mmol/L)
[Na+] (mg/100 mL)
95% Na+ Confidence Interval (mg/100 mL)
If we have two compounds: acetone (CH₃COCH₃) and acetic acid (CH₃COOH), applying heat to them produces an aldol condensation of the two compounds. If this is correct, draw the formula for the final product.
If we have two compounds: acetone (CH3COCH3)
and acetic acid (CH3COOH); if we apply heat (A),
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Chapter 24 Solutions
Laboratory Techniques in Organic Chemistry
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