0
Add your answer:
Earn +20 pts
How do you determine the molecular geometry of a molecule?
The molecular geometry of a molecule can be determined using the VSEPR theory. VSEPR (Valence Shell Electron Pair Repulsion) Theory: The basic premise of this simple theory is that electron pairs (bonding and nonbonding) repel one another; so the electron pairs will adopt a geometry about an atom that minimizes these repulsions. Use the method below to determine the molecular geometry about an atom. Write the Lewis dot structure for the molecule. Count the number of things (atoms, groups of atoms, and lone pairs of electrons) that are directly attached to the central atom (the atom of interest) to determine the overall (electronic) geometry of the molecule. Now ignore the lone pairs of electrons to get the molecular geometry of the molecule. The molecular geometry describes the arrangement of the atoms only and not the lone pairs of electrons. If there are no lone pairs in the molecule, then the overall geometry and the molecular geometry are the same. If the overall geometry is tetrahedral, then there are three possibilities for the molecular geometry; if it is trigonal planar, there are two possibilities; and if it is linear, the molecular geometry must also be linear. The diagram below illustrates the relationship between overall (electronic) and molecular geometries. To view the geometry in greater detail, simply click on that geometry in the graphic below. Although there are many, many different geometries that molecules adopt, we are only concerned with the five shown below.
Why is the molecular geometry of PH3 trigonal pyramidal?
In having three hydrogens attached to a phosphorous atom the arrangement is forced as the lone pairs must be kept as far from each other as possible, thus the geometry here.
What is the electron-pair geometry for SeOF2?
SeOF2 is known as Selenyl Difluoride. The Se atom has one pair of electrons, each F atom has three pairs, and the O has two pairs of electrons.
Which one of the following describes the molecular geometry of a molecule with four electron groups with only bonded pairs?
tetrahedral, if it had three electron groups it would be trigonal planar
What is the molecular geometry of PF3?
In a molecule of phosphorus fluoride, the phosphorus atom is in the center, and it is surrounded by the three fluoride atoms which are arranged at three of the four points of a tetrahedron. (The fourth point of the tetrahedron contains an electron pair from the phosphorus atom.)
Which theory describes the way are arranged within a molecule?
the VSEPR theory
What is the Preferred geometry of molecule BrF3?
The preferred geometry of BrF3 is T-shaped, with the bromine atom at the center and three fluorine atoms arranged around it. This molecular geometry is determined by the repulsion between the lone pair on the bromine atom and the bonding pairs of electrons.
What shape does the molecule SF3 plus have?
The SF3+ molecule has a T-shaped molecular geometry, with three bonding pairs and two lone pairs around the sulfur atom.
What molecular geometries are associated with AB3?
The molecular geometry associated with AB3 is trigonal planar. This geometry results when there are three bonding pairs and no lone pairs around the central atom. Additionally, all bond angles in a molecule with AB3 geometry are 120 degrees.
How do you determine the molecular geometry of a molecule?
The molecular geometry of a molecule can be determined using the VSEPR theory. VSEPR (Valence Shell Electron Pair Repulsion) Theory: The basic premise of this simple theory is that electron pairs (bonding and nonbonding) repel one another; so the electron pairs will adopt a geometry about an atom that minimizes these repulsions. Use the method below to determine the molecular geometry about an atom. Write the Lewis dot structure for the molecule. Count the number of things (atoms, groups of atoms, and lone pairs of electrons) that are directly attached to the central atom (the atom of interest) to determine the overall (electronic) geometry of the molecule. Now ignore the lone pairs of electrons to get the molecular geometry of the molecule. The molecular geometry describes the arrangement of the atoms only and not the lone pairs of electrons. If there are no lone pairs in the molecule, then the overall geometry and the molecular geometry are the same. If the overall geometry is tetrahedral, then there are three possibilities for the molecular geometry; if it is trigonal planar, there are two possibilities; and if it is linear, the molecular geometry must also be linear. The diagram below illustrates the relationship between overall (electronic) and molecular geometries. To view the geometry in greater detail, simply click on that geometry in the graphic below. Although there are many, many different geometries that molecules adopt, we are only concerned with the five shown below.
Why BH3 is a trigonal planar?
BH3 has three electron pairs around the boron atom, resulting in a trigonal planar molecular geometry due to the repulsion between the electron pairs around the central atom. This geometry allows for the maximum separation between electron pairs, leading to a more stable molecule.
What is the electronic geometry of bi3?
What is the electronic geometry of Bi_3? Enter the ... Thus, the total number of electrons in the molecule will be 24. There are no lone pairs in boron. Three electron domains are thus present in this molecule. Therefore, the electronic geometry of B I 3 is trigonal planar.
What is the molecular geometry of NBr3?
The molecular geometry of NBr3 is trigonal pyramidal. This is because there are three bonding pairs and one lone pair of electrons around the central nitrogen atom, causing the molecule to adopt a trigonal pyramidal shape.
What type of bonding around a central would result in a trigonal planar molecule -apex?
A molecule with a trigonal planar geometry around a central atom typically results from having three bonding pairs of electrons around the central atom, forming a flat triangle. This is commonly seen in molecules with sp2 hybridization, such as those with three sigma bonds and no lone pairs around the central atom.
Why is the molecular geometry of PH3 trigonal pyramidal?
In having three hydrogens attached to a phosphorous atom the arrangement is forced as the lone pairs must be kept as far from each other as possible, thus the geometry here.
How many tatal lone pairs are present in molecule of KrF2?
There are three lone pairs present in a molecule of KrF2.
How many unshardd pairs of electrons are in a molecule of hydrogen iodide?
There would be three unshared pairs of electrons in a molecule of hydrogen iodide.
