Valence Shell Bonding Nonbonding Approx. Molecule or Lewis Electron Electron Electron VSEPR Bond Geometric Molecular Ion Structure Pairs Pairs Pairs Formula Angle Shape 1. CH4 H 4 4 AX, 109.5° tetrahedral H:C:H H 1. Complete the table (as outlined above) for the following molecules/molecular ions, all of which obey the Lewis octet rule. Complete those that are assigned by your laboratory instructor. j. SiF, k. H,S 1. NH2

Valence Shell Bonding Nonbonding Approx. Molecule or Lewis Electron Electron Electron VSEPR Bond Geometric Molecular Ion Structure Pairs Pairs Pairs Formula Angle Shape 1. CH4 H 4 4 AX, 109.5° tetrahedral H:C:H H 1. Complete the table (as outlined above) for the following molecules/molecular ions, all of which obey the Lewis octet rule. Complete those that are assigned by your laboratory instructor. j. SiF, k. H,S 1. NH2

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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For each of the following molecules or molecular ions, give the steric number, sketch and name the approximate molecular geometry, and describe the direction of any distortions from the approximate geometry due to lone pairs. In each case, the central atom is listed first and the other atoms are all bonded directly to it. (a) TeH2 (b) AsF3 (c) PCl4+ (d) XeF5+
A paper published in the research Journal Science in 2007 (S. Vallina and R. Simo, Science, Vol. 315, p. 506, January 26, 2007) reported studies of dimethylsulfide (DMS), an important green-house gas that is released by marine phytoplankton. This gas represents the largest natural source of atmospheric sulfur and a major precursor of hygroscopic (i.e., cloud-forming) particles in clean air over the remote oceans, thereby acting to reduce the amount of solar radiation that crosses the atmosphere and is absorbed by the ocean. (a) Sketch the Lewis structure of dimethylsulfide, CH3SCH3, and list the bond angles in the molecule. (b) Use electronegativities to decide where the positive and negative charges lie in the molecule. Is the molecule polar? (c) The mean seawater concentration of DMS in the ocean in the region between 15 north latitude and 15 south latitude is 2.7 nM (nanomolar). How many molecules of DMS are present in 1.0 m3 of seawater?
“Inert” xenon actually forms several compounds, especially with the highly electronegative elements oxygen and fluorine.The simple fluorides XeF₂, XeF₄, and XeF₆ are all formed by di-rect reaction of the elements. As you might expect from the sizeof the xenon atom, the Xe-F bond is not a strong one. Calcu-late the Xe-F bond energy in XeF₆, given that the heat of for-mation is 402 kJ/mol.
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 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 suchcompounds are possible? (Make no distinction between single anddouble bonds between the atoms.)
Fill in the blank spaces in the following chart. If the moleculecolumn is blank, find an example that fulfills the conditionsof the rest of the row.
Propylene, C3H6, is a gas that is used to form the importantpolymer called polypropylene. Its Lewis structure is given. (a) What is the total number of valence electrons in the propylenemolecule? (b) How many valence electrons are usedto make σ bonds in the molecule? (c) How many valenceelectrons are used to make π bonds in the molecule? (d) Howmany valence electrons remain in nonbonding pairs in themolecule? (e) What is the hybridization at each carbon atomin the molecule?
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?
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. PCl5* OF2 SF4* 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
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. H3O+ 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 IONS LEWIS STRUCTURE A B C D E F G
The compound SF3N has been synthesized.(a) Draw the Lewis diagram of this molecule, supposingthat the three fluoride atoms and the nitrogen atomsurround the sulfur atom. Indicate the formal charges.Repeat, but assume that the three fluorine atoms andthe sulfur atom surround the nitrogen atom.(b) From the results in part (a), speculate about whicharrangement is more likely to correspond to the actualmolecular structure.
Propylene, C3H6, is a gas that is used to form the importantpolymer called polypropylene. Its Lewis structure is (a) What is the total number of valence electrons in the propylenemolecule? (b) How many valence electrons are usedto make s bonds in the molecule? (c) How many valenceelectrons are used to make p bonds in the molecule? (d) Howmany valence electrons remain in nonbonding pairs in themolecule? (e) What is the hybridization at each carbon atomin the molecule?