Selected Solutions Manual For General Chemistry: Principles And Modern Applications
11th Edition
ISBN: 9780133387902
Author: Ralph H. Petrucci, F. Geoffrey Herring, Jeffry D. Madura, Carey Bissonnette
Publisher: PEARSON
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Chapter 11, Problem 68IAE
A conjugated hydrocarbon has an alternation of double and single bonds. Draw the molecular orbitals of the p system of 1,3,5- hexatriene. If the energy required to excite an electron from the HOMO to the LUMO corresponds to a wavelength of 256 nm, do you expect the wavelength for
the corresponding excitation in 1,3,5,7-octatetraene to be a longer or shorter wavelength? [Hint: Refer to Figure 11-34.]
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For monocyclic conjugated polyenes (such as cyclobutadiene and benzene) with each of N carbon atoms contributing an electron in a 2p orbital, Huckel theory gives the fol lowing expression for the energies Ek of the resulting π molecular orbitals Calculate the energies of the 1t molecular orbitals of benzene and cyclooctatetraene. Comment on the presenceor absence of degenerate energy levels. (b) Ca lcu late and compare the delocalization energies of benzene and hexatriene using the expression from the preceding problem. What do you conclude from your results? (c) Calculate and compare the delocalization energies of cyclooctatetraeneand (linear) octatetraene. Are your conclusions for th is pair of molecules the same as for the pair of molecules investigated in part (b)?
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Chapter 11 Solutions
Selected Solutions Manual For General Chemistry: Principles And Modern Applications
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Ch. 11 - Match each of the following species with one of...Ch. 11 - Propose a hybridization scheme to account for...Ch. 11 - Indicate which of the following molecules and ions...Ch. 11 - In the manner of Figure 11-18, indicate the...Ch. 11 - Write Lewis structures for the following...Ch. 11 - Represent bonding in the carbon dioxide molecule,...Ch. 11 - Use the method of Figure 11-19 to represent...Ch. 11 - Use the method of Figure 11-19 to represent...Ch. 11 - The molecular model below represents citric acid,...Ch. 11 - Malic is e common organic acid found in unripe...Ch. 11 - Shown below are ball-and-stick models. Describe...Ch. 11 - Shown below are ban-and-stick models. Describe...Ch. 11 - Prob. 23ECh. 11 - The structure of the molecule allene, CH2CCH2 , is...Ch. 11 - Angelic acid, shown below, occurs in symbol root,...Ch. 11 - Dimethylolpropionic acid, shown below, is used in...Ch. 11 - Explain the essential difference in how the...Ch. 11 - Describe the bond order of diatomic carbon, C2 ,...Ch. 11 - Prob. 29ECh. 11 - The paramagnetism of gaseous B2 has been...Ch. 11 - Prob. 31ECh. 11 - Is it correct to say that when a diatomic molecule...Ch. 11 - For the following pairs of molecular orbitals,...Ch. 11 - For each of the species C2+,O2,F2+ , and NO+ ; a....Ch. 11 - Write plausible molecular orbital occupancy...Ch. 11 - We have used the term “isoelectronic” to refer to...Ch. 11 - Consider the molecules NO+ and N2+ and use...Ch. 11 - Consider the molecules CO+ and CN- and use...Ch. 11 - Construct the molecular orbital diagram for CF....Ch. 11 - Construct the molecular orbital diagram for SrCl....Ch. 11 - Explain why the concept of delocalized molecular...Ch. 11 - Explain how it is possible to avoid the concept of...Ch. 11 - In which of the following molecules would you...Ch. 11 - In which of the following ions would you expect to...Ch. 11 - The Lewis structure of N2 indicates that the...Ch. 11 - Show that both the valence bond method and...Ch. 11 - A group of spectroscopists believe that they have...Ch. 11 - Lewis theory is satisfactory to explain bonding in...Ch. 11 - The compound potassium sesquoxide has the...Ch. 11 - Draw a Lewis structure for the urea molecule, CO(...Ch. 11 - Methyl nitrate, CH2NO2 , is used as a rocket...Ch. 11 - Fluorine nitrate, FONO2 , is an oxidizing agent...Ch. 11 - Draw a Lewis structure(s) for the nitrite ion, NO2...Ch. 11 - Think of the reaction shown here as involving the...Ch. 11 - Prob. 55IAECh. 11 - Prob. 56IAECh. 11 - The molecule formamide, HCONH2 , has the...Ch. 11 - Pyridine, C2H2N , is used in the synthesis of...Ch. 11 - Prob. 59IAECh. 11 - The ion F2Cl is linear, but the ion F2Cl+ is bent....Ch. 11 - Prob. 61IAECh. 11 - Prob. 62IAECh. 11 - Prob. 63IAECh. 11 - Prob. 64IAECh. 11 - Histidine, an essential amino acid, serves as a...Ch. 11 - The anion I42 is linear, and the anion I5 is...Ch. 11 - Prob. 67IAECh. 11 - A conjugated hydrocarbon has an alternation of...Ch. 11 - An elusive intermediate of atmospheric reactions...Ch. 11 - Resonance energy is the difference in energy...Ch. 11 - Furan, C4H4O , is a substance derivable from oat...Ch. 11 - As discussed in Are You Wondering 11-1, the sp...Ch. 11 - In Chapter 10, we saw that electronegativity...Ch. 11 - Borazine, B2N2H2 is often referred to as inorganic...Ch. 11 - Which of the following combinations of orbitals...Ch. 11 - Prob. 76FPCh. 11 - Prob. 77SAECh. 11 - Prob. 78SAECh. 11 - Explain the important distinctions between the...Ch. 11 - A molecule in which sp2 hybrid orbitals are used...Ch. 11 - Prob. 81SAECh. 11 - The hybridization scheme for the central atom...Ch. 11 - Of the following, the species with a bond order of...Ch. 11 - The hybridization scheme for Xe in XeF2 is (a) sp;...Ch. 11 - Delocalized molecular orbitals are found in (a)...Ch. 11 - Prob. 86SAECh. 11 - Why does the hybridization sp2d not account for...Ch. 11 - What is the total number of (a) bonds and (b) p...Ch. 11 - Which of the following species are paramagnetic?...Ch. 11 - Use the valence molecular orbital configuration to...Ch. 11 - Use the valence molecular orbital configuration to...Ch. 11 - Which of these diatomic molecules do you think has...Ch. 11 - For each of the following ions or molecules,...Ch. 11 - Draw Lewis structures for the NO2 and NO2+ ions,...Ch. 11 - In which of the following is the central atom sp...Ch. 11 - Prob. 96SAECh. 11 - According to molecular orbital theory, the O22 ion...Ch. 11 - What is the angle between the hybrid orbitals...Ch. 11 - Consider the molecule with the Lewis structure...Ch. 11 - Construct a concept map that embodies the ideas of...Ch. 11 - Prob. 101SAECh. 11 - Construct a concept map that describes the...
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