Molecular Models: Lewis Electron Dot Structures and Molecular Geometry Part A: Use the molecular model kit and complete the following table. Total Sketch of Molecular number of Lewis Name of the Molecule is three- electron dot molecular polar or попрolar? formula valence dimensional structure electrons geometry geometry 5+5 = 10 NEN Non polat Trigonal Polar Pyramidal N2 NEN Linear %3D 5+311 HNHH NH3 H2S 2メ1+G CO2 PF3 CH4 SO2 HCN H2CO

Molecular Models: Lewis Electron Dot Structures and Molecular Geometry Part A: Use the molecular model kit and complete the following table. Total Sketch of Molecular number of Lewis Name of the Molecule is three- electron dot molecular polar or попрolar? formula valence dimensional structure electrons geometry geometry 5+5 = 10 NEN Non polat Trigonal Polar Pyramidal N2 NEN Linear %3D 5+311 HNHH NH3 H2S 2メ1+G CO2 PF3 CH4 SO2 HCN H2CO

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter10: Molecular Structure And Bonding Theories

Section: Chapter Questions

Problem 10.89QE

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The uracil molecule is one of the bases in DNA. Estimate the approximate values of the indicated bond angles. Its skeleton (not its Lewis structure) is given below.
A benzene molecule can be modeled as six carbon atoms arrangedin a regular hexagon in a plane. At each carbon atom, one of threeradicals NH2, COOH, or OH can be attached. How many suchcompoundsare possible?
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?
In which of the following AFn molecules or ions is there morethan one F¬A¬F bond angle: SiF4, PF5, SF4, AsF3?
The bond between carbon and hydrogen is one of the most important typesof bonds in chemistry. The length of an H¬C bond is approximately 1.1 Å.Based on this distance and differences in electronegativity, do you expect thedipole moment of an individual H¬C bond to be larger or smaller than that ofan H¬I bond?
a polyatomic containing an unknown element, E, has the chemical formula EO3-, with 26 total electrons. Draw the best lewis stucture, provide three possible identities of element E and predict the molecular geometry and bond angles for this ion.
The molecule 2-butene, C4H8, can undergo a geometricchange called cis-trans isomerization:As discussed in the “Chemistry and Life” box on the chemistryof vision, such transformations can be induced bylight and are the key to human vision. (a) What is the hybridizationat the two central carbon atoms of 2-butene?(b) The isomerization occurs by rotation about the centralC¬C bond. With reference to Figure 9.29, explainwhy the p bond between the two central carbon atoms isdestroyed halfway through the rotation from cis- to trans-2-butene. (c) Based on average bond enthalpies (Table 8.3),how much energy per molecule must be supplied to breakthe C¬C p bond? (d) What is the longest wavelength oflight that will provide photons of sufficient energy to breakthe C¬C p bond and cause the isomerization? (e) Is thewavelength in your answer to part (d) in the visible portionof the electromagnetic spectrum? Comment on the importanceof this result for human vision.
Consider the molecule PF4Cl. (a) Draw a Lewis structure forthe molecule, and predict its electron-domain geometry.(b) Which would you expect to take up more space, a P¬Fbond or a P¬Cl bond? Explain. (c) Predict the molecular geometryof PF4Cl. How did your answer for part (b) influenceyour answer here in part (c)? (d) Would you expect the moleculeto distort from its ideal electron-domain geometry? Ifso, how would it distort?
Given the following molecules and/or ions, characterize them according to the formatshown in the table below. The central atom of the molecule/ion is shown in boldface.The central atom or molecules marked with an asterisk (*) do not obey the octet rule. SF6* XeF2* SnCl4 A=Bonding electronsB= Sigma-bondsC =Nonbonding electron pairsD= Hybrid orbitals havingnonbonding electron pairsE =Hybrid orbitals usedF= 3-D structure (NAME)G =Polar (P) or nonpolar (NP) MOLECULE OR ION LEWIS STRUCTURE A B C D E F G
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The figure that follows contains ball-and-stick drawings ofthree possible shapes of an AF4 molecule. (a) For each shape,give the electron-domain geometry on which the moleculargeometry is based. (b) For each shape, how many nonbondingelectron domains are there on atom A? (c) Which of thefollowing elements will lead to an AF4 molecule with theshape in (iii): Be, C, S, Se, Si, Xe? (d) Name an element A thatis expected to lead to the AF4 structure shown in (i).