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Figure 2.1.2 ‑ 2.. PES of the S N 2 and S N 1 mechanism.

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Presentation on theme: "Figure 2.1.2 ‑ 2.. PES of the S N 2 and S N 1 mechanism."— Presentation transcript:

1 Figure ‑ 2.. PES of the S N 2 and S N 1 mechanism

2 Elimination Elimination: One molecule is cleavaged into two molecule PT: Proton Transfer, LGE: Leaving Group Explusion Mechanisms E1 : leaving group (X) cleavage first) E2 : The H and the X is cleavaging simultaneously E1cb : H cleaved first (cb: conjugated base) The elimination reactions are often competing with substitution because of tight similarity

3 SN2SN2 1,2 E Compiting reaction ways A schematic illustration of two extreme cases: E2 is favoured over E1 (left hand side) and E1 is favoured over E2 (right hand side). It is assumed that under ordinary circumstances E1 cb is the least favoured mechanism.


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