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Unformatted text preview: Consequently, there is an ordering of repulsions of electrons around central atom. VSEPR Theory Criteria for the ordering of the repulsions: 1. Lone pair to lone pair is the strongest repulsion. 2. Lone pair to bonding pair is intermediate repulsion. 3. Bonding pair to bonding pair is weakest repulsion. Mnemonic for repulsion strengths lp/lp > lp/bp > bp/bp Lone pair to lone pair repulsion is why bond angles in water are less than 109.5 o . Polar Molecules: The Influence of shape shape affects molecular polarity. Due to the effect of the bond dipoles and how they either cancel or reinforce each other....
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- Fall '07