9_Ch9_1p2 - VSEPR rules can be applied to other structures...

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Unformatted text preview: VSEPR rules can be applied to other structures •  molecules without a single central atom (organic molecules) •  molecules with multiple bonds tetrahedral (bent ) 122 HH H H HH trigonal pl anar o H H H O H 117o H3C tetrahedral Mary J. Bojan Chem 110 O CH3 tetrahedral 18 Structure of alkanes Lewis Structures H HC HH H H H C C HH H H C C C H H H All C atoms have 4 bonded pairs H H H H H C C C C H H H H H H H H no lone pairs EPG: MG: Bond angle = Mary J. Bojan Chem 110 19 H ALKENES Contain one or more double bonds ethene H H C H H H C C H H C propene CH 3 The carbons on either side of the double bond have three electron domains. EPG: MG : C=CȺH or C=CȺC Bond angle Mary J. Bojan Chem 110 20 ALKYNES contain one or more triple bonds HȺC≡CȺH ethyne CH3ȺC≡CȺH propyne Each C has two electron domains. EPG MG: bond angle Mary J. Bojan Chem 110 21 Determine the approximate bond angles indicated Angle #1 1. 2. 3. 4. 5. Mary J. Bojan 109° 180° 120° 109° 120° Chem 110 Angle #2 109° 120° 90° 120° 109° 22 ...
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This note was uploaded on 07/16/2011 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Spring '08 term at Pennsylvania State University, University Park.

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9_Ch9_1p2 - VSEPR rules can be applied to other structures...

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