W2013CHM2311 Part 4a Notes

At this point the spherical h 1s orbitals will no

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Unformatted text preview: balanced by nuclear ­nuclear repulsion. Bonding According to MO Theory Imagine bringing together two hydrogen atoms to generate H2. 1.  Ini0ally, the two independent hydrogen atoms (HA and HB) each contain one electron in the 1s orbital. These H 1s orbitals are described by their atomic wave func0ons, which are defined as ϕA and ϕB. 2.  When the two hydrogen atoms are very close to each other (around 0.1 nm apart) the electron in each atom will feel a strong a_rac0on to the nucleus of the other atom. At this point, the spherical H 1s orbitals will no longer accurately describe the electrons. 3.  Going back to first principles and calcula0ng the correct new orbital func0ons would be painful! Therefore, an approxima0on can be made... Bonding According to MO Theory When two hydrogen atoms combine, what do the new orbitals look like? We can approximate a new orbital (ψMO) by...
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