Strategy for Writing Lewis Structures

Strategy for Writing Lewis Structures - Strategy for...

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Strategy for Writing Lewis Structures These "rules" will work for a large majority of organic compounds. Those systems that may not work using this method include: a) some carbocations (meaning, a compound that looks like this: CmHn+); b) any compound with an odd number of valence electrons (i.e., radicals). 1. Determine the total number of valence electrons by adding the valence electrons in the constituent atoms (adjust for charge if needed). 2. Write the skeletal structure linking the necessary atoms with single covalent bonds. This structure has the minimum number of bonding electrons. 3. For each bond, subtract two electrons from the total number of valence electrons to give the total number of electrons that can exist as non-bonded electrons or forms of multiple bonds (if the number here is zero, you can skip to step 7!). 4. Determine the number of electrons required to fill the octet around each* (except hydrogen, which requires two electrons). If the number equals the number calculated in Step 3, place the
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This note was uploaded on 11/12/2010 for the course CHE 107 taught by Professor Yok during the Spring '10 term at Middle East Technical University.

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Strategy for Writing Lewis Structures - Strategy for...

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