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Unformatted text preview: methyl groups' bond is stretched in order to make the transition state planar. This stretching of the bond requires energy and therefore slows the reactions. 4. see attached diagram on page 4 5. Sn2: (CH3)3-COH + K (metal) --> (CH3)3-OK (potassium tert-butoxide) (CH3)3-COK + C2H5-Br --> (CH3)3-C-O-C2H5 Sn1: (CH3)3-C-Br + 2 EtOH --> (CH3)3-C-OC2H5 + Br- + H2O-C2H5+ (protonated ethanol) (CH3)3-C+ is formed. Ethanol then acts as a nucleophile… (CH3)3-C-O+(H)-C2H5 then a proton transfer yields: C2H5-OH2(+). .....
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This note was uploaded on 09/18/2011 for the course CHEM 3AL taught by Professor Li during the Spring '08 term at Berkeley.
- Spring '08