What is the molecular orbital theory

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VB and MO method40 min.

chemistryGeneral ChemistryChemical bond

The learning unit deals with the VB and MO methods.

LCAO method for homonuclear diatomic molecules60 min.

chemistryGeneral ChemistryChemical bond

The linear combination of atomic orbitals to molecular orbitals is a mathematical process in which the wave functions of the orbitals in question are added or subtracted. For a qualitative consideration, one can restrict oneself to the pictorial representations of the orbitals, which are combined according to certain principles.

Properties of the Alkenes20 min.

chemistryOrganic chemistryAlkenes

This learning unit gives an overview of the physical properties and bonding relationships of the alkenes. The hybridization and the orbital model are explained.

Chemical bond: resonance20 min.

chemistryOrganic chemistryChemical bond

In this learning unit, the concept of resonance is introduced using the example of the allyl cation. The MO and VB theory are also explained using the allyl cation.

Properties of the alkynes20 min.

chemistryOrganic chemistryAlkynes

This learning unit describes the properties of the alkynes, with the physical properties being discussed. The electronic structure is explained and the molecular orbital model of the alkynes is explained.

Chemical bond: hydrogen molecule ion, LCAO approach60 min.

chemistryTheoretical chemistryChemical bond

Two approaches to describe the chemical bond quantum mechanically are presented here: the valence bond theory (VB theory) and the molecular orbital theory (MO theory). The hydrogen molecule ion is a special case because it only has one electron and therefore the associated Schrödinger equation can be solved.

Chemical bond: molecular orbital theory20 min.

chemistryOrganic chemistryChemical bond

This learning unit introduces the molecular orbital theory. The theory is explained using the example of hydrogen and helium.

Qualitative MO theory - any systems30 min.

chemistryTheoretical chemistryMolecular Modeling

This learning unit describes molecular orbitals for any system. A distinction is made between homonuclear (e.g. oxygen or nitrogen) and heteronuclear (e.g. nitrogen monoxide) molecules. In addition, the list of group orbitals is presented using the example of the methyl group.

Qualitative MO theory - π systems30 min.

chemistryTheoretical chemistryMolecular Modeling

This learning unit describes how molecular orbitals can be set up in a qualitative way. Linear and cyclic π systems are discussed.