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VSEPR plan • Importance of molecular “shapes” – Drug molecules / interactions • CO2 vs SO2 vs H2O – Similarities? – Differences? (How to explain these?) • Quick answer/run through • 5 “Parent” Structures (What “family” are you in?) • Importance of how to count electron “groups” (or electron clouds) [not just for VSEPR!] • My approach (Family first, then consider lone pairs) Pages possibly shown in class • http://www.worldofmolecules.com/drugs/ • http://www.worldofmolecules.com/3D/codeine_ 3d.htm • http://en.wikipedia.org/wiki/Codeine • Try other drug molecules at the above sites! • http://www.youtube.com/watch?v=keHS-CASZfc • http://www.youtube.com/watch?v=KJjNfsRfFXU& feature=related Nice VSEPR Summary on web • http://intro.chem.okstate.edu/1314f97/chapt er9/VSEPR.html