0243Pb52an-09.cwk (WP)

0243Pb52an-09.cwk (WP) - *. Here are the two arrangements...

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Answers to Problem 52, Chemistry 0243 - 2009 Develop an orbital argument for why the E2 elimination favors the 180° arrangement over the 0° arrangement. H L B: much better than: H B: L 180° Hint: If the C-H bond is full (it is) what orbital of C-L must it interact with? If the CH bond is full, we must look for an empty orbital on C—L, and that is
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Unformatted text preview: *. Here are the two arrangements with CH ( ) and CL ( *) drawn in: H L much better than: H L 180 0 good overlap The 180 arrangement is fine, with stong overlap. By contrast, 0 has little overlap at all, and what there is is both bonding and antibonding. No contest....
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