EP CHEMISTRY:CENTRAL SCI.-MOD.MASTERING
EP CHEMISTRY:CENTRAL SCI.-MOD.MASTERING
14th Edition
ISBN: 9780137453535
Author: Brown
Publisher: SAVVAS L
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Chapter 9, Problem 116IE

The molecule 2-butene, C4Hs, can undergo a geometric change called cis-t As discussed in the "Chemistry and Life" box on the chemistry of Vision, such transformations can be induced by light and are the key to human VIS10n.

a What is me hybridization at the two central carbon atoms of 2.butene?

b. The isomerization occurs by rotation about the central bond, With reference to Figure 9.29, explain why the Ir bond between the two central carbon atoms is destroyed halfr.ay through the rotation from cis- to trans-2-butene

c. Based on average bond enthalpies (Table 8.3Q), how much energy per molecule must be supplied to break the C-CTr bond?

d. What is the longest wavelength of light that will provide photons of sufficient energy to break the C-CW bond and cause the isomerization?

e. Is the wavelength in your answer to part (d) in the visible portion of the electromagnetic spectrum? Comment on the importance of this result for human vision

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(15 pts) Consider the molecule B2H6. Generate a molecular orbital diagram but this time using a different approach that draws on your knowledge and ability to put concepts together. First use VSEPR or some other method to make sure you know the ground state structure of the molecule. Next, generate an MO diagram for BH2. Sketch the highest occupied and lowest unoccupied MOs of the BH2 fragment. These are called frontier orbitals. Now use these frontier orbitals as your basis set for producing LGO's for B2H6. Since the BH2 frontier orbitals become the LGOS, you will have to think about what is in the middle of the molecule and treat its basis as well. Do you arrive at the same qualitative MO diagram as is discussed in the book? Sketch the new highest occupied and lowest unoccupied MOs for the molecule (B2H6).
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Chapter 9 Solutions

EP CHEMISTRY:CENTRAL SCI.-MOD.MASTERING

Ch. 9.6 - Prob. 9.6.1PECh. 9.6 - Prob. 9.6.2PECh. 9.6 - Prob. 9.7.1PECh. 9.6 - Prob. 9.7.2PECh. 9.7 - Prob. 9.8.1PECh. 9.7 - Prob. 9.8.2PECh. 9.8 - Prob. 9.9.1PECh. 9.8 - Prob. 9.9.2PECh. 9 - Prob. 1DECh. 9 - 9.1 A certain AB4, molecule has a "seesaw" shape...Ch. 9 - Prob. 2ECh. 9 - Prob. 3ECh. 9 - Prob. 4ECh. 9 - Prob. 5ECh. 9 - Prob. 6ECh. 9 - In the hydrocarbon a. What is the hybridization at...Ch. 9 - The drawing below shows the overlap of two hybrid...Ch. 9 - Prob. 9ECh. 9 - 9.10 The following is part of a molecular...Ch. 9 - Prob. 11ECh. 9 - Prob. 12ECh. 9 - 9.13 a. An AB2 molecule is linear. How...Ch. 9 - a. Methane (CH4) and the perchlorate ion (C104-)...Ch. 9 - Prob. 15ECh. 9 - Prob. 16ECh. 9 - Prob. 17ECh. 9 - Prob. 18ECh. 9 - In which of these molecules or ions does the...Ch. 9 - Prob. 20ECh. 9 - How many nonbonding electron pairs are there in...Ch. 9 - Prob. 22ECh. 9 - Prob. 23ECh. 9 - Prob. 24ECh. 9 - Give the electron-domain and molecular geometries...Ch. 9 - Prob. 26ECh. 9 - Prob. 27ECh. 9 - Prob. 28ECh. 9 - Prob. 29ECh. 9 - Prob. 30ECh. 9 - Ammonia, NH3 reacts with incredibly strong bases...Ch. 9 - In which of the following AFn molecules or ions is...Ch. 9 - a. Explain why BrF4 is square planar, whereas...Ch. 9 - 9.34 Name the proper three-dimensional molecule...Ch. 9 - Prob. 35ECh. 9 - Prob. 36ECh. 9 - Prob. 37ECh. 9 - Prob. 38ECh. 9 - a. (a) Is the molecule BF3 polar or nonpolar? b....Ch. 9 - Prob. 40ECh. 9 - Predict whether each of the following molecules is...Ch. 9 - Prob. 42ECh. 9 - Prob. 43ECh. 9 - Prob. 44ECh. 9 - For each statement, irldicate whether it is true...Ch. 9 - Draw sketches illustrating the overlap between the...Ch. 9 - For each statement, indicate whether it is true or...Ch. 9 - Prob. 48ECh. 9 - Prob. 49ECh. 9 - Consider the SC12 molecule. a. What IS the...Ch. 9 - Indicate the hybridization of the central atom in...Ch. 9 - Prob. 52ECh. 9 - Prob. 53ECh. 9 - Prob. 54ECh. 9 - Prob. 55ECh. 9 - Prob. 56ECh. 9 - a. Draw Lewis structures for ethane (C2He),...Ch. 9 - a. Draw Lewis structures for ethane (C2He),...Ch. 9 - Prob. 59ECh. 9 - Ethyl acetate. C4H802, is a fragrant substance...Ch. 9 - Prob. 61ECh. 9 - Prob. 62ECh. 9 - Prob. 63ECh. 9 - Prob. 64ECh. 9 - In the formate ion, HC02- , the carbon atom is the...Ch. 9 - Prob. 66ECh. 9 - Prob. 67ECh. 9 - Prob. 68ECh. 9 - Prob. 69ECh. 9 - a. If you combine two atomic orbitals on two...Ch. 9 - Prob. 71ECh. 9 - Prob. 72ECh. 9 - Prob. 73ECh. 9 - Indicate whether each statement is true or false....Ch. 9 - Prob. 75ECh. 9 - Prob. 76ECh. 9 - Prob. 77ECh. 9 - Prob. 78ECh. 9 - Prob. 79ECh. 9 - Prob. 80ECh. 9 - Determine the electron configurations for CN+, CN,...Ch. 9 - Prob. 82ECh. 9 - Consider the molecular orbitals of the P2...Ch. 9 - The iodine bromide molecule, IBr, is an...Ch. 9 - Prob. 85AECh. 9 - Prob. 86AECh. 9 - Consider the following XF4 ions: PF4, BrF4-,...Ch. 9 - 9.88 Consider the molecule PF4Cl....Ch. 9 - Prob. 89AECh. 9 - Fill in the blank spaces in the following chart....Ch. 9 - Prob. 91AECh. 9 - Prob. 92AECh. 9 - Prob. 93AECh. 9 - Prob. 94AECh. 9 - Prob. 95AECh. 9 - Prob. 96AECh. 9 - Prob. 97AECh. 9 - Prob. 98AECh. 9 - Prob. 99AECh. 9 - Prob. 100AECh. 9 - In ozone, 03, the two oxygen atoms on the ends Of...Ch. 9 - Butadiene, C4H6, is a planar molecule that has the...Ch. 9 - The structure of borazine, B3N3H6, is a...Ch. 9 - Prob. 104AECh. 9 - Prob. 105AECh. 9 - Prob. 106AECh. 9 - Prob. 107AECh. 9 - Prob. 108AECh. 9 - Azo dyes are organic dyes that are used for many...Ch. 9 - a. Using only the valence atomic orbitals of a...Ch. 9 - Carbon monoxide, CO, is isoelectronic to N2. a....Ch. 9 - The energy-level diagram in Figure 9.36 shows that...Ch. 9 - A compound composed of 2.1 29.8%N, and 68.1%O has...Ch. 9 - 9.114 Sulfur tetrafluoride (SR4) reacts slowly...Ch. 9 - Prob. 115IECh. 9 - The molecule 2-butene, C4Hs, can undergo a...Ch. 9 - Prob. 117IECh. 9 - Use average bond enthalpies (Table 8.3 ) to...Ch. 9 - Prob. 119IECh. 9 - Prob. 120IECh. 9 - Prob. 121IECh. 9 - Prob. 122IE
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