Selective ligand exchange reaction, treatment

Example Selective activation of C-H bonds is rarely observed in saturated alkyl groups, but the iridium complex 1 does react by C-H insertion of the metal into a ligand bond upon treatment with LiBr in solution. The reaction can be tracked by LT-FAB-MS (Fig. 9.17). A decreasing intensity of the molecular ion of 1, m/z 812.4, and increasing of 2, m/z 856.4, indicate the progress of this reaction. Furthermore, the halogen exchange is indicated by the isotopic pattern. 

The treatment of 6 with CH30Na in methanol selectively affords a neutral pentahydrido cluster 7 (Equation (2)), which undergoes an intermolecular H/D exchange with C6De as the result of arene C-H bond activation via an 7 -arene intermediate. The two kinds of hydrido ligands, /it-H and /it3-H, mutually exchange coordination sites in solution. Pentahydrido cluster 7 displays remarkable activity in reactions with non-activated hydrocarbons such as alkanes. 

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