1-Chapter1OutlineF07

1-Chapter1OutlineF07 - Outline of Important Concepts from...

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Outline of Important Concepts from Chapter 1 (these concepts will continue to reappear through all of 151 and 152) negative to positive : the most simple way to think about organic reactions and mechanisms. This means that being able to identify which atom is negative and which is positive is essential to 151 and 152. In order to determine whether an atom has a charge (full or partial) you will need to be able to: Draw Lewis dot structures including: o Follow the octet rule – no Texas carbons! C No! o Fill in all lone pairs of valence electrons o Calculate formal charge One of your goals should be to practice enough so that you can easily and quickly recognize and assign charge/electrons to the most common forms of C, N, O: see recitation worksheet Formal charge can be calculated. One way to determine whether an atom has a partial charge is to compare ELECTRONEGATIVITIES of covalently bonded atoms. You should be able to use the period table to compare electronegativities.
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