Inorganic Chemistry
5th Edition
ISBN: 9780321811059
Author: Gary L. Miessler, Paul J. Fischer, Donald A. Tarr
Publisher: Prentice Hall
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Textbook Question
Chapter 4, Problem 4.28P
For the following molecules, determine the number of IR-active
c.
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Which of the following has the largest CN stretching energy?
OA.A
OB. B
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O D.D
Ο Ε.Ε
C
O
NH₂
IZ
A
O
D
N
B
EN
O
E
ZI
N
The concept of bond-stretch isomerization was a debated topic in the inorganic literature
throughout the 1970's and 1980's. The best example of this concept is that of mer-
MoOCl2(PMe2Ph)3. Single crystal XRD showed two unique bond distances for the M=O double
bond and IR data showed two unique stretching frequencies, suggesting that two isomers of
the complex existed with two unique M=O bond distances. However, this idea didn't sit well
with many inorganic chemists as it seemed to defy our understanding of chemical bonding. In
the 1990's, the concept of bond-stretch isomers was finally debunked with the help of higher
resolution instrumentation. Read Gerard Parkin's Acc. Chem. Res. article on the topic and
explain how XRD, IR, and 'H-NMR experiments were used in combination to unravel the
mystery.
Using infrared spectroscopy, how could you experimentally determine that you have the trans isomer rather than the cis one?
Chapter 4 Solutions
Inorganic Chemistry
Ch. 4.1 - Prob. 4.1ECh. 4.1 - Find all the symmetry elements in the following...Ch. 4.2 - Use the procedure described previously to verify...Ch. 4.3 - Prob. 4.4ECh. 4.3 - Verify the transformation matrices for the E and...Ch. 4.3 - Prepare a representation flowchart according to...Ch. 4.4 - Which point groups are possible for chiral...Ch. 4.4 - Write the corresponding 99 transformation matrices...Ch. 4.4 - Using the x, y, and z coordinates for each atom in...Ch. 4.4 - Reduce the following representations to their...
Ch. 4.4 - Prob. 4.11ECh. 4.4 - Analysis of the x, y, and z coordinates of each...Ch. 4.4 - Determine the number of IR-active CO stretching...Ch. 4.4 - Prob. 4.14ECh. 4 - Determine the point groups for a. Ethane...Ch. 4 - Determine the point groups for a. Ethylene b....Ch. 4 - Determine the point groups for a. Acetylene b....Ch. 4 - Determine the point groups for a. Naphthalene b....Ch. 4 - Determine the point groups for a. 1,1’ ...Ch. 4 - Determine the point groups for a. Cyclohexane...Ch. 4 - Determine the point groups for a. A sheet of...Ch. 4 - Determine the point groups for a. A flat oval...Ch. 4 - Determine the point groups for a. A triangular...Ch. 4 - Determine the point groups for the examples of...Ch. 4 - Determine the point groups of the molecules in the...Ch. 4 - Determine the point groups of the molecules and...Ch. 4 - Determine the point groups of the following atomic...Ch. 4 - a. Show that a cube has the same symmetry elements...Ch. 4 - Suppose an octahedron can have either yellow or...Ch. 4 - What point groups are represented by the symbols...Ch. 4 - Prob. 4.17PCh. 4 - Determine the point groups for the following flags...Ch. 4 - Prepare a representation flowchart according to...Ch. 4 - For trans-1,2-dichloroethylene, which has C2h...Ch. 4 - Ethylene has D2h symmetry. a. List all the...Ch. 4 - Using the D2d character table, a. Determine the...Ch. 4 - Reduce the following representations to...Ch. 4 - For D4h symmetry use sketches to show that dxy...Ch. 4 - Prob. 4.25PCh. 4 - XeOF4 has one of the more interesting structures...Ch. 4 - Repeat the procedure from the previous problem,...Ch. 4 - For the following molecules, determine the number...Ch. 4 - Prob. 4.29PCh. 4 - The structure of 1,1,2,2-tetraiododisilane is...Ch. 4 - Both cis and trans isomers of IO2F4 have been...Ch. 4 - White elemental phosphorus consists of tetrahedral...Ch. 4 - Complexes of the general formula Fe(CO)5x( PR3)x...Ch. 4 - Prob. 4.35PCh. 4 - Prob. 4.36PCh. 4 - Prob. 4.37PCh. 4 - Prob. 4.38PCh. 4 - Determine the point groups of the following...Ch. 4 - Prob. 4.40PCh. 4 - Determine the point groups of the following: a....Ch. 4 - Use the Internet to search for molecules with the...
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- What are the splitting and integrations of these two structures?arrow_forwardNMR theory: Spin-lattice (T,) relaxation refers to the amount of time required for the spins to return to their thermal equilibrium distribution along the xy plane. * O True Falsearrow_forward2) Which of the following 3 compounds will have the highest CO stretching frequency in the IR? What does this indicate (the metal is electron-rich or electron-deficient)? a) b) Me3 Pl Me3P MOCO CO PMe3 c) (MeO) 3 Pl (MeO)3P со Ph3Pl.. Ph3P CO P(OMe)3 Moco PPh 3arrow_forward
- The infrared spectrum of CBr4 has a strong absorption at 667 cm-1. What is the correct assignment of this absorption?and why ? a.) A bending or bending mode. b.) The asymmetric stretching of the four C-Br bonds. c.) The symmetric stretching of the four C-Br bonds. d.) The stretching of a C-Br bond.arrow_forwardWhat type(s) of molecular motion is (are) observed using infrared spectroscopy? A. Stretching and bending B. Rotation and excitation C. Spin flipping. D. Fragmentationarrow_forwardMaximum covalence of Nitrogen is ‘4’ but the heavier elements of group15 show covalence greater than ‘4’. Why?arrow_forward
- What is the correct answer ?arrow_forward2. Do you observe any change in the form of the absorbance bands while moving from nonpolar to polar solvents?arrow_forwardWhich of the following molecules would be expected to have absorbance in the IR range from an asymmetric stretching vibration? CO2 CF4 CCl4 NO2 All of the above.arrow_forward
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