Table of Contents
- 1 When these bond to make CCl4 What is the shape of a CCl4 molecule?
- 2 What is the relationship between these numbers and the number of electron groups around the central atom?
- 3 Under what circumstances are electron geometry and molecular geometry not the same?
- 4 Why does CCl4 have tetrahedral shape?
- 5 What is the correct electron group arrangement for nh3?
- 6 What would be the shape of the molecule if it has two electron regions How about with three and four electron regions?
- 7 How many lone pairs of electrons are there in CCl4?
- 8 Why do NH3 and BH3 have different molecular geometries?
When these bond to make CCl4 What is the shape of a CCl4 molecule?
CCl4 has a tetrahedral geometry with bond angles of 109.5 °.
What is the relationship between these numbers and the number of electron groups around the central atom?
The number of electron groups around the central atom is equal to the total number hybrid orbitals formed (or the number of orbitals involved in the hybridization) in the central atom.
Under what conditions would the electronic geometry and molecular geometry be the same for a molecule?
The electron geometry and the molecular geometry are the same when every electron group bonds two atoms together.
Under what circumstances are electron geometry and molecular geometry not the same?
If lone pairs of electrons, electrons not bonded to other atoms, are located in the molecule, this will change the molecular geometry, not the electron geometry. If all the electron groups are bonded, with no lone pairs, then the electron geometry and molecular geometry are the same.
Why does CCl4 have tetrahedral shape?
CCl4 has no lone pairs on the central carbon and is therefore of tetrahedral geometry. 4. Recall bond angles of tetrahedral geometry to be 109.5 degrees. There will be no deviation from this expected angle as all Cl atoms are the same and are thus repel each other equally.
When drawing the electron dot structures for CCl4 where would the carbon be placed and why?
In our example, CCl4, there are fewer carbon atoms than chlorine atoms, so the carbon atom goes into the middle of the molecule, with four chlorine atoms arranged around it.
What is the correct electron group arrangement for nh3?
tetrahedral
Ammonia also has four electron pairs and the coordination geometry of nitrogen is based upon a tetrahedral arrangement of electron pairs….VSEPR calculation for ammonia, NH. 3.
| Total: | 8 |
|---|---|
| 4 electron pairs: | tetrahedral geometry for the four shape-determining electron pairs |
What would be the shape of the molecule if it has two electron regions How about with three and four electron regions?
Two regions of electron density around a central atom in a molecule form a linear geometry; three regions form a trigonal planar geometry; four regions form a tetrahedral geometry; five regions form a trigonal bipyramidal geometry; and six regions form an octahedral geometry.
What is the hybridization of the ionic compound CCl4?
Carbon completes its octet by forming bonds with four chlorine atoms. The hybridization of CCl4 is sp3 and has a tetrahedral shape. The bond angle is 109.8 degrees between the lone pairs of electrons and it is nonpolar.
How many lone pairs of electrons are there in CCl4?
Total 8 electrons make the bonds while others are non-bonding pairs of electrons. So there are a total of 24 non-bonding or 12 lone pairs of electrons in CCl4. Four lines in the structure represent four bonds while dots around the Chlorine atom represent valence electrons.
Why do NH3 and BH3 have different molecular geometries?
Originally Answered: Why two compounds with same genetic formula, NH3 and BH3, have different molecular geometries? The geometries of these molecules essentially conform to the space needed for their electrons. If you look at the periodic table, you’ll see that boron is a Group III element, whereas nitrogen is in Group V.
Why does CH4 have a tetrahedral shape?
One possibility is that the central atoms differ in the way in which their electrons are arranged. Consider molecules with steric number = 4 (four sets of electrons around the central atom). VSEPR predicts a tetrahedral geometry with bond angles of 109.5 deg. That is exactly what is observed in CH4.