Ch_322a_1.014

Ch_322a_1.014 - Alkenes: the Carbon-Carbon Double Bond The...

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Alkenes: the Carbon-Carbon Double Bond The covalent bonding possibilities to carbon include two, four and six electron bonds. C . . . . atomic state C : : :: C 4 single bonds C :: : C= 2 single and one double bond C ::: : C one single and one triple bond
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Alkenes: The Carbon-Carbon Double Bond Consider two carbon atoms coming together to share 4 valence electrons in a covalent bond: Lewis Structures C . . . . C . . . . C . . . C . . . . . a two electron bond C . . . C . . . . . a four electron bond The remaining valence electrons are used to form covalent bonds to other atoms or groups. In ethene, C 2 H 4 , four hydrogen atoms are bonded to the carbons. H:C::C:H H : H or H-C=C-H H H
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Geometry of Ethene Ethene is a planar molecule with the internal bond angles shown below. C C H H H H 121 o 118 o This trigonal planar arrangement of the bonding electrons is predicted by the valence shell electron pair repulsion theory .
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The Hybrid Orbital Model
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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_1.014 - Alkenes: the Carbon-Carbon Double Bond The...

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