Shape of the Molecule Use VSEPR Theory

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Presentation transcript:

Shape of the Molecule Use VSEPR Theory Valance Shell Electron Pair Repulsion Bond angles, geometry Steric number = # bond to central atom + # lone pair to central atom Rules: Carbon will always be the central atom Double bond, triple bonds will count as 1 bond

Shape of Molecule CH4 SN = 4 + 0 = 4 Shape: tetrahedral Angel: 109.5o

Shape of Molecule C2H4 CH2O SN = 3 + 0 = 3 Shape: Trigonal Planar Angel: 120o

Shape of Molecule C2H2 SN = 2 + 0 = 2 Shape: Linear Angel: 180o

Bond Types and Bond Strength Bond type determines strength/length Bond Strength Bond length