1. The problem statement, all variables and given/known data CH3CH2-Br + (CH3)3C-O¯+K ----> (CH3)3C-O-CH2CH3 ethylbromide + potassium t-butoxide ---> ethyl t-butyl either can someone please tell me why this is a Sn2 reaction? 2. Relevant equations 3. The attempt at a solution I figured it should be Sn1 because the nucleophile is tertiary, but that is not the case. Is it because O is primary? Even then the nucleophile seems very crowded for an Sn2 reaction. Thanks in advanced.