Chemistry: The Central Science (13th Edition)
13th Edition
ISBN: 9780321910417
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
Publisher: PEARSON
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Textbook Question
Chapter 18.1, Problem 18.1.2PE
The energy-level diagram in Figure 9.36 shows that the sideways overlap of a pair of p
orbitals produces two molecular orbitals, one bonding and one antbonding. In ethylene there is a
pair of electrons in the bonding n orbital between the two carbons. Absorption of a photon of the
appropriate wavelength can result in promotion Of one Of the bonding electrons from the r2p to the
Ir. molecular orbital.
a. Assuming this electronic transition corresponds to the HOMO-LUMO transition, what is the
HOMO in ethylene?
b Assuming this electronic transition corresponds to the HOMO-LUMO transition, what is the
LUMO in ethylene?
c. Is the bond in ethylene stronger or weaker in the excited State than the ground state?
d. Is the C-C bond in ethylene easier to twist in the ground state or in the excited state?
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Students have asked these similar questions
a. Draw a molecular orbital diagram for the valence electrons in the helium-hydrogen diatomic (HeH).
b. Label the 2 molecular orbitals as either bonding or antibonding and describe the key differences between these types of molecular orbitals in terms of electron density.
c. Calculate the bond order of HeH based on your molecular orbital diagram.
d. Do you expect the bond length in the cation HeH+ to be longer or shorter than in a neutral HeH? Justify your answer based on the molecular orbital diagram and bond order for both species.
The molecular orbital (MO) diagram of OF is given below. Answer Questions 15 - 18.
2p. 2, 2e,
OF
F
15. How many electrons are in the two degenerate molecular orbitals (MOs)?
A. There are three electrons with one MO being doubly occupied and the other singly occupied.
B. There are two electrons with each MO being singly occupied.
C. There are two electrons that occupy one of the two MOs.
D. There are four electrons that occupy both * MOS.
E. There is only one electron that occupies one of the two MOS.
16. What is the bond order?
A. 0.5
B. 1.0
C. 1.5
D. 2.0
E. 2.5
17. The HOM0 is
C. O
D.
E.
18. The LUMO is
B.
C. ,
D.
E. .
a.An s orbital and a p orbital can combine to form molecular orbitals in a couple different ways. Draw a sketch of the overlap between these two atomic orbitals that would produce each of the following molecular orbitals.
A. a sigma bonding MO
B. a sigma antibonding MO
b. For each of the following molecules, make a list of the molecules that are (i) polar, (ii) nonpolar and (iii) ionic.
A. NH 3
B. H2 O
C. CH3 CH2 CH3
D. NH4 Cl
E. Na2 SO 4
F. CH3 Cl
G. C6H6OH
H. CH3COOH
I. LiNO3
Chapter 18 Solutions
Chemistry: The Central Science (13th Edition)
Ch. 18.1 - Carbon monoxide, CO, is isoelectronic to N2. a....Ch. 18.1 - The energy-level diagram in Figure 9.36 shows that...Ch. 18.1 - A compound composed of 2.1 29.8%N, and 68.1%O has...Ch. 18.1 -
9.114 Sulfur tetrafluoride (SR4) reacts slowly...Ch. 18 - Prob. 1DECh. 18 - Prob. 1ECh. 18 - Prob. 2ECh. 18 - Prob. 3ECh. 18 - Prob. 4ECh. 18 - You have a gas at 25C confined to a cylinder with...
Ch. 18 - Prob. 6ECh. 18 - Prob. 7ECh. 18 - Prob. 8ECh. 18 - Prob. 9ECh. 18 - Prob. 10ECh. 18 - Prob. 11ECh. 18 - Prob. 12ECh. 18 - Prob. 13ECh. 18 - Prob. 14ECh. 18 - Prob. 15ECh. 18 -
Gallium melts just above room temperature...Ch. 18 - Prob. 17ECh. 18 - Prob. 18ECh. 18 - Prob. 19ECh. 18 - Prob. 20ECh. 18 - Do the reactions involved in ozone depletion...Ch. 18 - Which of the following reactions in the...Ch. 18 - Prob. 23ECh. 18 - Prob. 24ECh. 18 - Prob. 25ECh. 18 - Prob. 26ECh. 18 - Prob. 27ECh. 18 - Prob. 28ECh. 18 - Prob. 29ECh. 18 - 18.30 The first stage in corrosion of iron upon...Ch. 18 - Prob. 31ECh. 18 - Prob. 32ECh. 18 - Prob. 33ECh. 18 - (a) With respect to absorption of radiant energy,...Ch. 18 - Prob. 35ECh. 18 - Prob. 36ECh. 18 - Prob. 37ECh. 18 - Prob. 38ECh. 18 - Prob. 39ECh. 18 - Prob. 40ECh. 18 - Prob. 41ECh. 18 - Prob. 42ECh. 18 - Prob. 43ECh. 18 - Prob. 44ECh. 18 - List the common products formed when an organic...Ch. 18 - Prob. 46ECh. 18 - The organic anion is found in most detergents....Ch. 18 - Prob. 48ECh. 18 - Prob. 49ECh. 18 - Prob. 50ECh. 18 - Prob. 51ECh. 18 - Prob. 52ECh. 18 - Prob. 53ECh. 18 - Prob. 54ECh. 18 - Prob. 55ECh. 18 - Prob. 56ECh. 18 - Prob. 57ECh. 18 - Prob. 58ECh. 18 - Prob. 59ECh. 18 - Prob. 60ECh. 18 - Prob. 61ECh. 18 - Prob. 62ECh. 18 - Prob. 63AECh. 18 - Prob. 64AECh. 18 - Prob. 65AECh. 18 - Prob. 66AECh. 18 - Prob. 67AECh. 18 - Prob. 68AECh. 18 - (a) What is the difference between a CFC and an...Ch. 18 - Prob. 70AECh. 18 - Prob. 71AECh. 18 - Prob. 72AECh. 18 - Prob. 73AECh. 18 - Prob. 74AECh. 18 - Prob. 75AECh. 18 - Prob. 76AECh. 18 - Prob. 77AECh. 18 - Prob. 78AECh. 18 - Prob. 79AECh. 18 - Prob. 80IECh. 18 - Prob. 81IECh. 18 - Prob. 82IECh. 18 - Prob. 83IECh. 18 - Prob. 84IECh. 18 - Prob. 85IECh. 18 - Prob. 86IECh. 18 - The standard enthalpies of formation of...Ch. 18 - The main reason that distillation is a costly...Ch. 18 - Prob. 89IECh. 18 - The following data were collected for the...Ch. 18 - Prob. 91IECh. 18 - Prob. 92IECh. 18 - Prob. 93IECh. 18 - Prob. 94IECh. 18 - Prob. 95IE
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