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Unformatted text preview: violated. 3. The arrows completely dictate the Lewis structure of the product. Other Suggestions for Proper Arrow Pushing: 4. The natural polarization of double bonds between unlike atoms is in the direction of the more electronegative atom and this will be the important direction of electron movement. 5. In drawing a mechanism, the formal charges of atoms in the reactants may change in the product. Use your knowledge of Lewis structures and formal charge to determine this. 6. The first step in writing a mechanism is to identify the nucleophile (Lewis Base) and the electrophile (Lewis Acid). The first arrow is always from the nucleophile to the electrophile. C. J. Rizzo 29 September 1993 S. C. Blackstock...
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- Fall '08