2.7 VSEPR and Hybridization

VSEPR theory uses ______ as a basis for predicting the arrangement of electron pairs around a central atom

Coulombic repulsion between electrons

Both Lewis diagrams and VSEPR theory must be used for:

Predicting electronic and structural properties of many covalently bonded molecules and polyatomic ions

The electronic and structural properties of many covalently bonded molecules and polyatomic ions that Lewis diagrams and VSEPR theory predict include:

Molecular geometry, bond angles, relative bond energies based on bond order, relative bond lengths, presence of a dipole moment, hybridization of valence orbitals for atoms within a molecule or polyatomic ion

Shapes of molecular geometry:

Linear, trigonal planar, tetrahedral, trigonal pyramidal, bent, trigonal bipyramidal, seesaw, T-shaped, octahedral, square pyramidal, square planar

The terms “hybridization” and “hybrid atomic orbital” are used to describe the:

Arrangement of electrons around a central atom

When the central atom is sp hybridized, its ideal bond angles are:

180 degrees

For sp² hybridized atoms the bond angles are:

120 degrees

For sp³ hybridized atoms the bond angles are:

109.5 degrees

Bond formation is associated with:

Overlap between atomic orbitals

In multiple bonds, overlap between atomic orbitals leads to the formation of:

Sigma and pi bonds

The overlap between atomic orbitals is stronger in sigma or pi bonds?

Sigma

The overlap between atomic orbitals being stronger in sigma bonds is reflected in:

Sigma bonds having greater bond energy than pi bonds

The presence of a pi bond prevents:

Rotation of the bond

The presence of a pi bond leads to:

Geometric isomers