A model for SiH4 is shown in the chem3D window. SIH4 has tetrahedral geometry. ball & stick labels Rotate the molecule until you have a feeling for its three-dimensional shape. How many atoms are bonded to the central atom? If you take any three of the outer atoms, what shape do they define? ( Consider the bond angles at the central atom. Do they all have the approximately the same numerical value? What is the approximate numerical value of this angle?( | degrees. Are all four positions about the central atom equivalent, or is one of them different from the other three. For practice, type in the name of the geometry of the molecule:| Previous Next

A model for SiH4 is shown in the chem3D window. SIH4 has tetrahedral geometry. ball & stick labels Rotate the molecule until you have a feeling for its three-dimensional shape. How many atoms are bonded to the central atom? If you take any three of the outer atoms, what shape do they define? ( Consider the bond angles at the central atom. Do they all have the approximately the same numerical value? What is the approximate numerical value of this angle?( | degrees. Are all four positions about the central atom equivalent, or is one of them different from the other three. For practice, type in the name of the geometry of the molecule:| Previous Next

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter1: Bond Angles And Shape

Section: Chapter Questions

Problem 14CTQ: A student draws the picture of ammonia (NH3) in the box below, left, and predicts it will be a...

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Consider the following flat drawing of methane (CH4) . a. What is HCH bond angle implied by this drawing if you assume it is flat? b. Are the electron domains of this flat CH4 spread out as much as possible? c. Use model materials to make a model of CH4 (methane). If you assembled it correctly, thefour bonds (bonding electron domains) of your model will be 109.5° apart. d. In which representation, the drawing above or the model in your hand (circle one) are theH’s of CH4 more spread out around the central carbon? e. Confirm that your model looks like the following drawing. The wedgebond represents a bond coming out of the page, and the dash bondrepresents a bond going into the page f. You will often see methane drawn as if it were flat (like on the previous page). Why is thismisleading, and what is left to the viewer’s imagination when looking at such a drawing?
How many valence electrons does a neutral a. K atom have? b. C atom? N atom? O atom?
In Chapter 6, we study a group of organic cations called carbocations. Following is the structure of one such carbocation, the tert-butyl cation. (a) How many electrons are in the valence shell of the carbon bearing the positive charge? (b) Using VSEPR, predict the bond angles about this carbon. (c) Given the bond angle you predicted in (b), what hybridization do you predict for this carbon?
Draw an example of a bent molecule with a bond angle of near 109.5°; then draw a different bentmolecule with a bond angle of about 120°.
For each of the Lewis structures shown below, predict the Electron Geometry, Molecular Geometry and Bond Angle. Lastly, using the same format as shown in the last column of Table 1, draw a sketch (using wedges and dashes to show 3D if needed) of the Molecular Geometry.
Draw the lewis structure of SO2 ( best resonance) and 2nd best resonance showing the shape and bond angles of each one, the 3D structure with polar bonds or bonds dipole of each one and the molecular polarity. Here is an example of what I want the answer to be like:
Explain in your own words, using 1-3 complete sentences and proper spelling and grammar, what holds the P atom to the F atom in a molecule of PF3? Be very specific. (Hint: is it a bond or a force? Which one?)
PI3Br2 is a nonpolar molecule. Based on this information, determine the I−P−I bond angle, the Br−P−Br bond angle, and the I−P−Br bond angle. Enter the number of degrees of the I−P−I, Br−P−Br, and I−P−Br bond angles, separated by commas (e.g., 30,45,90)
Use VSEPR theory to predict the shape of this molecule (POC13) and indicate any deviation from the bond angle(s) expected from a regular arrangement of repulsion axes. Show all the steps took to arrive at answer 4 to five sentences
1. Can you help me what does mean for the Valence Shell Electron Pair Repulsion (VSEPR) Theory and examples too? 2. Can you help me with the explanation of the diatomic molecule, small molecule, large molecule and examples too?
The molecule shown here is difluoromethane (CH2F2), which isused as a refrigerant called R-32. (a) Based on the structure, howmany electron domains surround the C atom in this molecule?(b) Would the molecule have a nonzero dipole moment? (c) Ifthe molecule is polar, which of the following describes the directionof the overall dipole moment vector in the molecule:(i) from the carbon atom toward a fluorine atom, (ii) from thecarbon atom to a point midway between the fluorine atoms,(iii) from the carbon atom to a point midway between the hydrogenatoms, or (iv) from the carbon atom toward a hydrogenatom?
In Table 1, complete the columns. (Remember that the values pertain to the Central atom only.) In Table 2, complete the columns. (Remember that the values pertain to the Central atom only.) In Table 3 complete the columns. . (Remember that the values pertain to the Central atoms only. In this table, you will have more than one central atom so report more than one value, ie. 3 / 3) Data: Table 1 Simple Molecules Molecule CH4 NH3 H2O CCl4 NCl3 Number of Bond Pairs Number of Lone Pairs Number of Electron Domains Molecular Geometry (Shape) Bond Angle Polar or Non-Polar Table 2 Molecules with Multiple Bonds Molecule CH2O HCN CO2 CO [NO2]- Number of Bond Pairs Number of Lone Pairs Number of Electron Domains Molecular Geometry (Shape)…