Chemistry In Context
9th Edition
ISBN: 9781259638145
Author: Fahlman, Bradley D., Purvis-roberts, Kathleen, Kirk, John S., Bentley, Anne K., Daubenmire, Patrick L., ELLIS, Jamie P., Mury, Michael T., American Chemical Society
Publisher: Mcgraw-hill Education,
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Chapter 13.2, Problem 13.1YT
Skill Building Small, but Important Differences
The size or number of rings is not the only difference between the nitrogen-containing bases. Let’s examine each of the four bases more closely.
- a. Draw Lewis structures for each of the four bases. Be sure to show the lone pairs of electrons on the nitrogen and oxygen atoms.
- b. Identify the H atoms that could form hydrogen bonds with water or other
nucleic acids. - c. Now identify the other (non-hydrogen) atoms that could participate in hydrogen bonding.
Hint: Revisit Section 8.3 for information on hydrogen bonds.
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Orange
Purple
Bromine
lodine
Procedure
Use these bonds and atoms to do the following:
1. Construct a model of methane. Write down its dash and condensed formulas. Can make a
second model of methane that is not superposable on your first one? If so, write down its dash and
condensed formulas.
you
2. Repeat step 1 for chloromethane.
3. Repeat step 1 for bromochloromethane.
4. Repeat step 1 for ethane. (HINTS: eth- means 2 carbons. It is OK to rotate around single bonds
when you try to superpose two molecules.)
5. Repeat step 1 for bromoethane.
6. Repeat step 1 for dibromoethane.
7. Repeat step 1 for iodopropane. (HINT: prop- means 3 carbons.)
8. Repeat step 1 for chloroethene. (HINT: -ene means that a carbon-carbon double bond, C=C, is
present.)
9. Repeat step 1 for dichloroethene. When you do this, you will uncover an important
concept, cis and trans isomers. Write the complete IUPAC name under the dash formula of
each of your isomers of dichloroethene.
10. Explain why
F.
F
H.
C.
and
H.…
A bond between atoms ith a
difference in electronegativity will be ionic.
O large
O small
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Chapter 13 Solutions
Chemistry In Context
Ch. 13.2 - Skill Building Small, but Important Differences...Ch. 13.2 - Prob. 13.2YTCh. 13.2 - Prob. 13.3YTCh. 13.2 - Prob. 13.4YTCh. 13.3 - Skill Building Complementary Base Sequences...Ch. 13.3 - Prob. 13.6YTCh. 13.3 - Prob. 13.7YTCh. 13.3 - Prob. 13.8YTCh. 13.4 - Prob. 13.9YTCh. 13.4 - Prob. 13.10YT
Ch. 13.5 - Scientific Practices How Is Hamburger Like Nylon?...Ch. 13.5 - Prob. 13.12YTCh. 13.5 - Scientific Practices Function Follows Form In...Ch. 13.6 - Prob. 13.14YTCh. 13 - The theme of this chapter is that DNA guides the...Ch. 13 - Prob. 2QCh. 13 - Prob. 3QCh. 13 - Consider the structural formulas in Figure 13.1....Ch. 13 - Prob. 5QCh. 13 - Prob. 6QCh. 13 - Prob. 7QCh. 13 - Prob. 8QCh. 13 - Prob. 9QCh. 13 - a. What does each letter in DNA stand for? b....Ch. 13 - Here is the structural formula for the base...Ch. 13 - Prob. 12QCh. 13 - Prob. 13QCh. 13 - Prob. 14QCh. 13 - Prob. 15QCh. 13 - Polar amino acids can be classified as acidic,...Ch. 13 - Prob. 17QCh. 13 - Prob. 18QCh. 13 - Explain one similarity and one difference between...Ch. 13 - Prob. 20QCh. 13 - Diagram the steps to produce insulin from a cow or...Ch. 13 - Prob. 22QCh. 13 - Prob. 23QCh. 13 - Prob. 24QCh. 13 - Prob. 25QCh. 13 - Prob. 26QCh. 13 - Prob. 27QCh. 13 - Prob. 28QCh. 13 - Almost all organisms use the same four bases and...Ch. 13 - Prob. 30QCh. 13 - Consider the idea of mixing genes as an...Ch. 13 - Prob. 32QCh. 13 - Prob. 33QCh. 13 - Prob. 34QCh. 13 - List two advantages and two disadvantages of...Ch. 13 - Prob. 37QCh. 13 - Prob. 38QCh. 13 - Prob. 39QCh. 13 - Recently developed techniques have dramatically...Ch. 13 - Find a transgenic organism not discussed in the...Ch. 13 - You are the head of a government facing another...
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