Figure 3 - full size

 

Figure 3.
Fig. 3. Proposed catalytic mechanisms of TEAS and HVS based on the TEAS crystal structures. (A) through (F) are reaction steps common to both TEAS and HVS. (G[1]) through (I[1]) are specific to TEAS, and (G[2]) through (I[2]) are^ specific to HVS. Carbocations are yellow, protons are light blue, and aromatic quadrupoles are indicated with purple lines. Intermediate^ structures are numbered according to the acyclic precursor, FPP (A). Figure was generated with Chem3D (CambridgeSoft).

The above figure is reprinted by permission from the AAAs: Science (1997, 277, 1815-1820) copyright 1997.