Ch_322a_1.010

Ch_322a_1.010 - energy A + B . . A-B Generally, the greater...

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The Covalent Bond Covalent bonds are formed from the overlap in space of combining orbitals. The in-phase combination leads to the bonding orbital that is filled with two valence electrons of opposite spin. These electrons are shared by the two nuclei. Bonds are formed because the electrostatic interaction of the two electrons with two nuclei is energetically more favorable than the electrostatic interaction of two localized electrons with two isolated nuclei. A + B . . A-B isolated atoms bonded state
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Unformatted text preview: energy A + B . . A-B Generally, the greater the orbital overlap, the stronger the bond. Shorter bonds are usually stronger bonds. Examples of Covalent Bonds 2 H . H 2 H 1s H 1s H H ! bond bond length 0.74 A o BDE 104 kcal/mol 2 F . F 2 F 2p F 2p F F 2p ! bond bond length 1.42A o BDE 38 kcal/mol Bonding and Antibonding MOs combining atomic orbitals molecular orbitals + s s s ! * antibonding s ! bonding + p p p ! * antibonding p ! bonding + p p p ! * antibonding p ! bonding...
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This note was uploaded on 07/22/2009 for the course CHEM 322AL taught by Professor Jung during the Summer '07 term at USC.

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Ch_322a_1.010 - energy A + B . . A-B Generally, the greater...

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