Hiickel Molecular Orbital Theory HMOT

Hiickel theory is the electronic structure method that most chemists have as the basis of their understanding of molecular orbitals. It is the simplest of all the methods, but can be amazingly insightful. In the present context, Hiickel theory can be summarized as follows only valence tt electrons are considered only nearest neighbor interactions are included the orbital overlap S is set equal to zero and electron-electron repulsion is neglected. Basically, 

HMOT analyzes connectivity (topology) of a tt system in a planar molecule. 

We will examine the implementation of HMOT in more detail below, learning how the method is used, the kinds of results it gives, and some of the insights obtained, all of which will be of paramount importance in understanding the following three chapters. 

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