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chiddler

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Apr 6, 2010
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is there a point with competing SN1 vs SN2 reactions that you add so much nucleophile that SN2 is preferred over SN1 even with a crappy nucleophile such as Cl(-)? or a tertiary leaving group?

since SN2 is bimolecular, we can influence rate by changing nucleophile concentration. but sn1 is just static in rate.
 

shoehornlettuce

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Nov 1, 2011
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I would think not and if there is I really doubt you would be tested on it. In SN2 reactions you can increase the rate by adding more nucleophile but in SN1 the rate determining step is the formation of the carbocation so adding more nucleophile shouldn't make any difference cause your leaving group still has to go.
 
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