Electron Repulsion and Bond Angles. Orbital Hybridization

6-3 ELECTRON REPULSION AND BOND ANGLES. ORBITAL HYBRIDIZATION 

If we proceed as we did with the H-H bond, we might try to formulate bond formation in BeH2 by bringing two hydrogen atoms in the (Is)1 state up to beryllium in the (Is)2 (2s)2 ground state (Table 6-1). But there is a problem— 

6 Bonding in Organic Molecules. Atomic-Orbital Models 

We might formulate a second x bond involving the 2p orbital, but a new problem arises as to where the hydrogen should be located relative to the beryllium orbital. Is it as in 2, 3, or some other way  

The Be and H nuclei will be farther apart in 2 than they will be in 3 or any other similar Arrangement, so there will be less internuclear repulsion with 2. We therefore expect the hydrogen to locate along a line going through the greatest extension of the 2p orbital. 

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Electron Repulsion and Bond Angles. Orbital Hybridization... 

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