Hybrid Orbitals - Hybrid Orbitals For polyatomic molecules...

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Hybrid Orbitals For polyatomic molecules we would like to be able to explain: The number of bonds formed Their geometries sp Hybrid Orbitals Consider the Lewis structure of gaseous molecules of BeF 2 : The VSEPR model predicts this structure will be linear What would valence bond theory predict about the structure? The fluorine atom electron configuration: 1 s 2 2 s 2 2 p 5 There is an unpaired electron in a 2 p orbital This unpaired 2 p electron can be paired with an unpaired electron in the Be atom to form a covalent bond The Be atom electron configuration: 1 s 2 2 s 2 In the ground state, there are no unpaired electrons (the Be atom is incapable of forming a covalent bond with a fluorine atom However, the Be atom could obtain an unpaired electron by promoting an electron from the 2 s orbital to the 2 p orbital: This would actually result in two unpaired electrons, one in a 2s orbital and another in a 2p orbital
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The Be atom can now form two covalent bonds with fluorine atoms
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Hybrid Orbitals - Hybrid Orbitals For polyatomic molecules...

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