CHEM 181 ExperimentOn Central atomValence Bonding eDomainsMolecularGeometryLewis DotStructurelone eVSEPRFormulaVSEPRMoleculeser lonShell eDomainsPairsGeometrySF4CIFsCЬНСоCO2Н.:C2H2CHF

A Lewis dot structure is a diagram that shows bonding between atoms.VSEPR geometry is the shape of a…

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Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter4: Molecular Structure And Orbitals

Section: Chapter Questions

Problem 13Q

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For each of the electron configurations in Problem 22, determine whether the molecule or molecular ion is paramagnetic or diamagnetic.
The diagram that follows shows the highest-energy occupiedMOs of a neutral molecule CX, where element X is in thesame row of the periodic table as C. (a) Based on the numberof electrons, can you determine the identity of X? (b) Wouldthe molecule be diamagnetic or paramagnetic? (c) Considerthe p2p MOs of the molecule. Would you expect them to havea greater atomic orbital contribution from C, have a greateratomic orbital contribution from X, or be an equal mixtureof atomic orbitals from the two atoms?
The VSEPR model was developed before any xenon com-pounds had been prepared. Thus, these compounds provided anexcellent test of the model’s predictive power. What would youhave predicted for the shapes of XeF₂, XeF₄, and XeF₆?
. Both the simple VB model and the LCAO method predictthat the bond order of Ne2 is 0. Explain how each arrivesat that conclusion.
Devise a 3-D model that demonstrates the bonding between atoms of ClF3 molecule as well as any lone pairs. You can use any material you want/have to demonstrate the model. Please attach clear pictures of the model.
Write simple valence bond wave functions for formationof bonds between C and H atoms. What C-H compounddoes the VB model predict? What geometry does it predictfor the molecules?
Carbon monoxide, CO, is isoelectronic to N2. (a) Draw aLewis structure for CO that satisfies the octet rule. (b) Assumethat the diagram in Figure 9.46 can be used to describethe MOs of CO. What is the predicted bond order forCO? Is this answer in accord with the Lewis structure youdrew in part (a)? (c) Experimentally, it is found that thehighest energy electrons in CO reside in a σ-type MO. Isthat observation consistent with Figure 9.46? If not, whatmodification needs to be made to the diagram? How doesthis modification relate to Figure 9.43? (d) Would you expectthe π2p MOs of CO to have equal atomic orbital contributionsfrom the C and O atoms? If not, which atom wouldhave the greater contribution?
The Lewis structure for allene isMake a sketch of the structure of this molecule that is analogousto Figure 9.25. In addition, answer the followingthree questions: (a) Is the molecule planar? (b) Does it havea nonzero dipole moment? (c) Would the bonding in allenebe described as delocalized? Explain.
1. The sigma bond between the Br and F atom in BrF4- is formed from the overlap of which two orbitals?a. 4sp3d-2sb. 4sp3d-2pc. 4sp3d2-2sd.4sp3d2-2p2. Consider the following species F2-, F2, and F2+. Which of these species will be paramagnetic? 3. Which of the following exhibits resonance?a. ClO3-b. BrF3c. OF2d. N2
Ketene, CH2=C=O, is an unusual organic molecule that has a singlecarbon atom doubly bonded to two different atoms. Determine thehybridization of both C atoms and the O in ketene. Then, draw a diagramshowing what orbitals are used to form each bond.
The substance chlorine monoxide, ClO(g), is important inatmospheric processes that lead to depletion of the ozonelayer. The ClO molecule has an experimental dipole momentof 1.24 D, and the Cl¬O bond length is 1.60 Å. (a)Determine the magnitude of the charges on the Cl and Oatoms in units of the electronic charge, e. (b) Based on theelectronegativities of the elements, which atom would youexpect to have a partial negative charge in the ClO molecule?(c) Using formal charges as a guide, propose the dominantLewis structure for the molecule. (d) The anion ClOexists.What is the formal charge on the Cl for the best Lewisstructure for ClO-?
The O¬H bond lengths in the water molecule 1H2O2 are0.96 Å, and the H¬O¬H angle is 104.5°. The dipole momentof the water molecule is 1.85 D. (a) In what directionsdo the bond dipoles of the O¬H bonds point? In what directiondoes the dipole moment vector of the water moleculepoint? (b) Calculate the magnitude of the bond dipoleof the O¬H bonds. (Note: You will need to use vector addition to do this.) (c) Compare your answer from part (b)to the dipole moments of the hydrogen halides (Table 8.3).Is your answer in accord with the relative electronegativityof oxygen?

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CHEM 181 Experiment On Central atom Valence Bonding e Domains Molecular Geometry Lewis Dot Structure lone e VSEPR Formula VSEPR Molecules er lon Shell e Domains Pairs Geometry SF4 CIFs CЬ НСо CO2 Н.: C2H2 CHF