exam #4 review session
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Exam #4 Review Session. Chem 111, Fall 2009. Bond Properties. Length Order Strength Polarity. Periodic Table. Bond Properties. Which atom is more electronegative? B or C N or P Which bond is most polar? C-C or C-O or C-F - PowerPoint PPT PresentationTRANSCRIPT
Exam #4 Review SessionChem 111, Fall 2009
Bond Properties
• Length• Order• Strength• Polarity
Periodic Table
Bond Properties
• Which atom is more electronegative? B or C N or P
• Which bond is most polar? C-C or C-O or C-F C-O or C-S
• Which bond is the longest? C-O or C-F C-O or C=O
Lewis StructuresWhy We Love Them (and you know we do!)
• Drawing a Lewis Structure:– Calculating formal charge– Determining which resonance structure is best
• Use Lewis Structure to:– Determine bond order– Determine electron pair and molecular geometry– Calculate formal charge and oxidation numbers– Determine hybridization and bond types
Draw a Lewis Structure for CS2
Periodic Table
Formal Charges and Oxidation Numbers
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Molecular Geometry
# Structural Pairs
Electron Pair Geometry Angle
Molecular Geometry
Number of Lone Pairs
0 1 2 3
4 Linear 180° Linear
3 trigonal planar 120° trigonal planar bent bent
4 tetrahedral 109.5° tetrahedral trigonal pyramidal bent
5 trigonal bipyramidal
90° 120°180°
trigonal bipyramidal see-saw T-shaped Linear
6 octahedral 90°180° octahedral square
pyramidalsquare planar
Molecular Geometry for Propane, 1-Propanol, and Propene
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Hybridization and Bond Types for Propane, 1-Propanol, and Propene
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Hybrid Orbital Geometry