Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 14.SE, Problem 61AP
Interpretation Introduction
Interpretation:
The concentration of the ergosterol solution whose absorbance A= 0.065 with a sample pathlength l = 1.00 cm is to be calculated if ergosterol has a UV absorption maxima of 282 nm and mole absorptivity ε = 11,900.
Concept introduction:
The molar absorptivity, ε, is given by 
where A is absorbance, C is the concentration of the solution in moles/lit and l is the sample path length in cm.
To calculate:
The concentration of the ergosterol solution whose absorbance A= 0.065 with a sample pathlength l = 1.00 cm, if ergosterol has a UV absorption maxima of 282 nm and mole absorptivity ε = 11,900.
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A 1.50 g sample of coniine, the toxic extract of poison hemlock, was dissolved in 10.0mL of ethanol and placed in a sample cell with a 5.00 cm pathlength. The observedrotation at the sodium D line was +1.21°. Calculate [α]D for coniine.
UV: max 235 (ε 12,000) and max 314 (ε 120)
EIMS: m/z 39 (31%), 41 (33%), 55 (37%), 69 (26%), 98 (100%), 99 (7%), 100 (0.2%)
IR:
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IR spectrum in
CCl4 solvent
2950 cm-¹
2000
4) RC=N
5) 0-H
BAYEHUNIERI -
R
1630 cm-¹
1710 cm-¹
$10
4a) Which of the following heteroatoms that are definitely NOT present based on the EIMS data? (Circle
all that apply).
Br Cl FSI 0
4 continued) Please refer to data on preceding page.
4b) From the EIMS data what is the best estimate of the number of carbon atoms in this molecule?
4c) From the UV data, conjugated л-bonds are: definitely present definitely absent
4d) From the IR spectrum alone, which of the following functional groups can be definitely ruled OUT?
Circle those that are ruled out and briefly explain why.
1) C=0
2) RC=CR
3) C=C
cannot tell
Chapter 14 Solutions
Organic Chemistry
Ch. 14.1 - Prob. 1PCh. 14.2 - Give the structures of both 1, 2 and 1, 4 adducts...Ch. 14.2 - Prob. 3PCh. 14.2 - Give the structures of both 1, 2 and 1, 4 adducts...Ch. 14.3 - Prob. 5PCh. 14.3 - Prob. 6PCh. 14.5 - Predict the product of the following Diels–Alder...Ch. 14.5 - Prob. 8PCh. 14.5 - Which of the following dienes have an s-cis...Ch. 14.5 - Predict the product of the following Diels–Alder...
Ch. 14.6 - Prob. 11PCh. 14.6 - Prob. 12PCh. 14.7 - Prob. 13PCh. 14.7 - Prob. 14PCh. 14.8 - Which of the following compounds would you expect...Ch. 14.SE - Prob. 16VCCh. 14.SE - Show the product of the Diels–Alder reaction of...Ch. 14.SE - Prob. 18VCCh. 14.SE - Prob. 19VCCh. 14.SE - Prob. 20MPCh. 14.SE - Prob. 21MPCh. 14.SE - In light of your answer to Problem 14-21 propose...Ch. 14.SE - Luminol, which is used by forensic scientists to...Ch. 14.SE - Prob. 24MPCh. 14.SE - Give IUPAC names for the following compounds:Ch. 14.SE - Prob. 26APCh. 14.SE - Prob. 27APCh. 14.SE - Electrophilic addition of Br2 to isoprene...Ch. 14.SE - Prob. 29APCh. 14.SE - Prob. 30APCh. 14.SE - Predict the products of the following...Ch. 14.SE - 2,3-Di-tert-butyl-1,3-butadiene does not undergo...Ch. 14.SE - Prob. 33APCh. 14.SE - Prob. 34APCh. 14.SE - Prob. 35APCh. 14.SE - Prob. 36APCh. 14.SE - Rank the following dienophiles in order of their...Ch. 14.SE - Prob. 38APCh. 14.SE - Prob. 39APCh. 14.SE - Prob. 40APCh. 14.SE - Although the Diels–Alder reaction generally...Ch. 14.SE - Prob. 42APCh. 14.SE - Tires whose sidewalls are made of natural rubber...Ch. 14.SE - Prob. 44APCh. 14.SE - Prob. 45APCh. 14.SE - Prob. 46APCh. 14.SE - Would you expect allene, H2C = C = CH2, to show a...Ch. 14.SE - The following ultraviolet absorption maxima have...Ch. 14.SE - Prob. 49APCh. 14.SE - -Ocimene is a pleasant-smelling hydrocarbon found...Ch. 14.SE - Draw the resonance forms that result when the...Ch. 14.SE - Prob. 52APCh. 14.SE - Treatment of 3,4-dibromohexane with strong base...Ch. 14.SE - Prob. 54APCh. 14.SE - Prob. 55APCh. 14.SE - Prob. 56APCh. 14.SE - Prob. 57APCh. 14.SE - Prob. 58APCh. 14.SE - Hydrocarbon A, C10H14, has a UV absorption at...Ch. 14.SE - Prob. 60APCh. 14.SE - Prob. 61APCh. 14.SE - Prob. 62APCh. 14.SE - Prob. 63APCh. 14.SE - Prob. 64APCh. 14.SE - The double bond of an enamine (alkene + amine) is...Ch. 14.SE - Prob. 66AP
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