Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Select the number of each feature present in vitamin D3. Please.

Transcribed Image Text:disease called rickets, so many Todas, including milk and cereais, are formed with vitami
D. Our bodies synthesize vitamin D when our skin is exposed to sunlight, but the lack of
outdoor exercise by today's children, in conjunction with regular use of sunscreen, may be
contributing to a rise in the disease. The amount of vitamin D3 in fortified foods and fish
can be measured by UV-Vis spectrometry. (J. Agric. Food Chem. 2009, 57, 2135-2146.),
Using Woodward-Fieser rules, estimate the expected Amax for vitamin D3:"
HO
267
Number of auxoch 272
277
Number of exocyc
Number of homoa
Estimated Amax
Select the number of each feature present in vitamin D3.
Base value (conjugated diene) = 217 nm
Number of additio
bonds:
H
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F7
H
Vitamin D3
eTextbook and Media
O
282
287
316
321
PrtScn
F8
onds:
CH3
groups:
es:
✓hm
H CH3
Home
F9
v
✓(+30 each)
(+5 each)
✓(+5 each)
(+39 each)
E
End
hulu
F10
PgUp
F11
12:39 AM
7/13/2023
PgDn
F12

Transcribed Image Text:As seen at the end of Section 16.10, a deficiency in vitamin D can cause a bonesoftening
disease called rickets, so many foods, including milk and cereals, are fortified with vitamin
'D. Our bodies synthesize vitamin D when our skin is exposed to sunlight, but the lack of
outdoor exercise by today's children, in conjunction with regular use of sunscreen, may be
contributing to a rise in the disease. The amount of vitamin D3 in fortified foods and fish
can be measured by UV-Vis spectrometry. (J. Agric. Food Chem. 2009, 57, 2135-2146.)
Using Woodward-Fieser rules, estimate the expected Amax for vitamin D3:
HO...
H
Vitamin D3
Select the number of each feature present in vitamin D3.
Base value (conjugated diene) = 217 nm
Number of additional double bonds:
Number of auxochromic alkyl groups:
Number of exocyclic double bonds:
Number of homoannular dienes:
Estimated Amax =
eTextbook and Media
PrtScn
F8
CH3
✓nm
H CH3
Home
F9
✓(+30 each)
✓(+5 each)
(+5 each)
✓(+39 each)
)
E
End
hulu
F10
PgUp
F11
12:38 AM
7/13/2023
PgDn
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