Cyclooctene complexes palladium

Table 14.4 Selective hydrogenation of 1,3-cyclooctadiene to cyclooctene with various palladium complexes.

In contrast to inactive iridium(TTI)-Peroxo complexes, Irm-hydroperoxo species have been shown to transfer oxygen to a coordinated alkene, for example in the slightly catalytic oxidation of cyclooctene to cyclooctanone by 02 + H2 mixtures in the presence of IrHCl2(CgH12) (equation 95). 68 Oxygen transfer presumably occurs as for palladium hydroperoxides in equations (89) and (90). 

The selective hydrogenation of non-conjugated dienes to monoolefins Is catalysed by Ru2(cod)2(02CCF3)2( t-02CCF3)2(p-0H). 1,5-cyclooctadlene Is reduced to cyclooctene Isomericatlon does not take place, and further reduction only occurs once all the diene has been consumed. By contrast, palladium complexes In the presence of the ferrocenyl ligands (1) reduces conjugated dienes to monoolefins, e. 1,3-cod to cyclooctene.21... 

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