SN2 Mechanism H HO: HO- H H HH H nucleophile electrophile transition state product leaving (substrate) group (SN2). Concerted reaction:New bond forming and old bond at same time. ·Reaction is order overall. Rate k[alkyl halide][nucleophile]. Chapter 6 SN2 Mechanism • ___________ _____________ _____________ (SN2). • Concerted reaction: New bond forming and old bond __________ at same time. • Reaction is ________ order overall. • Rate = kr [alkyl halide][nucleophile]. Chapter 6 8