Worked example: Using formal charges to evaluate nonequivalent resonance structures | Khan Academy

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When a molecule has nonequivalent resonance structures, one structure may contribute more to the resonance hybrid than another. In terms of formal charge, a structure generally contributes more when (1) the formal charges on the atoms are minimized and (2) any negative formal charges are on more electronegative atoms and any positive charges are on more electropositive atoms. In this video, we use these guidelines to evaluate the nonequivalent resonance structures of SCN⁻. View more lessons or practice this subject at www.khanacadem...
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