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Molecular Orbitals

Terms

Molecular Orbital Theory

Molecular Orbital Theory

Antibonding Molecular Orbital  -  A molecular orbital that results from an out-of-phase overlap of atomic orbitals to produce an orbital that is higher in energy than either of its parent molecular orbitals.
Atomic Orbital  -  A hydrogenic wavefunction, e.g. 1s, 2p, 3d.
Bond  -  That which holds together atoms in molecules and ions in lattices.
Bonding Molecular Orbital  -  A molecular orbital that results from an in-phase overlap of atomic orbitals that has a lower energy than either of its parent atomic orbitals.
Bond Order  -  The difference between the number of bonding electron pairs an the number of antibonding electron pairs in a molecule.
Covalent Bond  -  A bond that results from a sharing of electrons between nuclei.
Hybridization  -  The process by which atomic orbitals are combined to produce a new set of orbitals suitable for use in a discussion of bonding in polynuclear atoms.
Ion  -  A charged species created by the gain or loss of an electron from an atom or neutral molecule.
Ionic Bond  -  A bond that results from electrostatic attraction between oppositely charged ions. The cation is positively charged, while the anion is negatively charged.
Lattice  -  A regularly repeating three-dimensional array of atoms, molecules, or ions.
Lewis Structure  -  A description of a covalent bond whereby electrons are represented by dots and a bond is represented by placing a line between the two atoms in that bond. Only valence electrons are shown in Lewis structures.
Lone Pair  -  A nonbonding pair of electrons.
Molecule  -  A chemical species containing a covalent bond.
Molecular Orbital  -  A combination of atomic orbitals in molecular orbital theory that provides an orbital description of a molecule analogous to the atomic orbital description of atoms.
Molecular Orbital Theory  -  A description of bonding that combines atomic orbitals from each bonded atom to produce a set of molecular orbitals.
Orbital Correlation Diagram  -  Discussed in Molecular Orbital Theory, Heading , such diagrams show the relative energy and the parentage of molecular orbitals from atomic orbitals.
Overlap  -  A measure of how well two orbitals constructively interfere with one another.
Valence Shell Electron Pair Repulsion Theory  -  A theory used to predict bonding geometries that states that electron pairs will be distributed about the central atom to minimize electron pair repulsions.

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