C5 cyclics isomerization

The surface complex shown in Scheme V may be identical with the common C intermediate of C5 cyclization and C5 cyclic isomerization 15a). Its degree of dissociation may not be too high (57), and the bond between it and the metal may have some sort of fluxional character. 

Two main pathways of metal-catalyzed skeletal rearrangement have been distinguished bond shift mechanism and C5 cyclic isomerization (7, 8). 

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