Chemistry: A Molecular Approach
3rd Edition
ISBN: 9780321809247
Author: Nivaldo J. Tro
Publisher: Prentice Hall
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Chapter 21, Problem 8E
Interpretation Introduction
Interpretation:
The steroids and their function in the body are to be explained.
Concept introduction:
• Steroids are
• Steroids are the lipids which contain the 4-membered ring. They serve as female and male hormones in the body.
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The Concept of Aromaticity
21.15 State the number of 2p orbital electrons in each molecule or ion.
(a)
(b)
(e)
(f)
(c)
(d)
(h)
(i)
DA
(k)
21.16 Which of the molecules and ions given in Problem 21.15 are aromatic according to the
Hückel criteria? Which, if planar, would be antiaromatic?
21.17 Which of the following structures are considered aromatic according to the Hückel
criteria?
---0-0
(a)
(b)
(c)
(d)
(e)
(h)
H
-H
.8.0-
21.18 Which of the molecules and ions from Problem 21.17 have electrons donated by a
heteroatom?
1. Show the steps necessary to make 2-methyl-4-nonene using a
Wittig reaction. Start with triphenylphosphine and an alkyl
halide. After that you may use any other organic or inorganic
reagents.
2. Write in the product of this reaction:
CH3
CH₂
(C6H5)₂CuLi
H₂O+
3. Name this compound properly, including stereochemistry.
H₂C
H3C
CH3
OH
4. Show the step(s) necessary to transform the compound on the
left into the acid on the right.
Bri
CH2
5. Write in the product of this
LiAlH4
Br
H₂C
OH
Chapter 21 Solutions
Chemistry: A Molecular Approach
Ch. 21 - Prob. 1SAQCh. 21 - Prob. 2SAQCh. 21 - Prob. 3SAQCh. 21 - Prob. 4SAQCh. 21 - Prob. 5SAQCh. 21 - Prob. 6SAQCh. 21 - Prob. 7SAQCh. 21 - Prob. 8SAQCh. 21 - Q9. Peptide bonds occur in which type of...Ch. 21 - Q10. How many nucleotides are required to code for...
Ch. 21 - 1. What is biochemistry? What significant advances...Ch. 21 - Prob. 2ECh. 21 - Prob. 3ECh. 21 - 4. What effect do double bonds have within the...Ch. 21 - Prob. 5ECh. 21 - Prob. 6ECh. 21 - 7. Describe the basic structure of phospholipids...Ch. 21 - 8. What is a steroid? List some functions of...Ch. 21 - Prob. 9ECh. 21 - Prob. 10ECh. 21 - Prob. 11ECh. 21 - Prob. 12ECh. 21 - Prob. 13ECh. 21 - Prob. 14ECh. 21 - Prob. 15ECh. 21 - Prob. 16ECh. 21 - Prob. 17ECh. 21 - Prob. 18ECh. 21 - Prob. 19ECh. 21 - Prob. 20ECh. 21 - Prob. 21ECh. 21 - Prob. 22ECh. 21 - Prob. 23ECh. 21 - Prob. 24ECh. 21 - Prob. 25ECh. 21 - Prob. 26ECh. 21 - 27. What is a codon? A gene? A chromosome?
Ch. 21 - Prob. 28ECh. 21 - Prob. 29ECh. 21 - Prob. 30ECh. 21 - Prob. 31ECh. 21 - Prob. 32ECh. 21 - Prob. 33ECh. 21 - Prob. 34ECh. 21 - 35. Draw structures showing the reaction of...Ch. 21 - Prob. 36ECh. 21 - Prob. 37ECh. 21 - Prob. 38ECh. 21 - Prob. 39ECh. 21 - Prob. 40ECh. 21 - Prob. 41ECh. 21 - Prob. 42ECh. 21 - Prob. 43ECh. 21 - Prob. 44ECh. 21 - Prob. 45ECh. 21 - Prob. 46ECh. 21 - Prob. 47ECh. 21 - Prob. 48ECh. 21 - 49. Draw each amino acid in its dipolar ion...Ch. 21 - 50. Draw each amino acid in its dipolar ion...Ch. 21 - Prob. 51ECh. 21 - Prob. 52ECh. 21 - Prob. 53ECh. 21 - Prob. 54ECh. 21 - Prob. 55ECh. 21 - Prob. 56ECh. 21 - Prob. 57ECh. 21 - Prob. 58ECh. 21 - 59. A phenylalanine amino acid on a protein strand...Ch. 21 - 60. An amino acid on a protein strand forms a...Ch. 21 -
61. The amino acid sequence in one section of a...Ch. 21 - Prob. 62ECh. 21 - Prob. 63ECh. 21 - Prob. 64ECh. 21 - Prob. 65ECh. 21 - Prob. 66ECh. 21 - Prob. 67ECh. 21 - Prob. 68ECh. 21 - Prob. 69ECh. 21 - Prob. 70ECh. 21 - 71. Determine the class of biochemical compound...Ch. 21 - Prob. 72ECh. 21 - 73. What is the difference between a codon and a...Ch. 21 - 74. What is the difference between a fatty acid...Ch. 21 - Prob. 75ECh. 21 - Prob. 76ECh. 21 - Prob. 77ECh. 21 - Prob. 78ECh. 21 - 79. Determining the amino acid sequence in a...Ch. 21 - Prob. 80ECh. 21 - Prob. 81ECh. 21 - 82. Calculate the mass percent of phosphorus in a...Ch. 21 - 83. The double helical structure of DNA disrupts...Ch. 21 - Prob. 84ECh. 21 - Prob. 85ECh. 21 - Prob. 86ECh. 21 - Prob. 87ECh. 21 - Prob. 88ECh. 21 - 89. Write the major equilibrium that is...Ch. 21 - Prob. 90ECh. 21 - Prob. 91ECh. 21 - 92. The genetic code is random, which means that a...
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