A silly two-electron example

In Chapter 2 we described several treatments of the H2 molecule, and, of course, there the question of dipole moments was irrelevant, although we could have 

We note that if the orbitals were scaled equally 2 (1 z 11 sj) = 5 (z + zj) and Uz is correctly zero at all distances. 

It is clear, when we calculate the electric moment with a more realistic wave function, that even the so-called covalent functions can make nonzero contributions when symmetry allows. 

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