Contents 4 Reductive Elimination Reactions

The C NMR spectra, recorded at 90 °C and 15 bar CO, reveal clearly that at low water content the resting state is indeed the acetyl complex 4. Between 0% and 5% water, IR monitoring of the reductive elimination reaction to go from 4... 

Also, it is apparent that the gel content of irradiated blends can be higher than that expected if the gelation was entirely due to the reaction of homopolymer PDMS. We can eliminate the possibility that PS is responsible for this deviation since previous results indicate that gel formation in the PS used does not take place below 200 Mrad. There are two possible explanations the first is that some PS is "trapped" (not bound) within the PDMS gel, and cannot be extracted from the matrix. The other is that the PDMS is undergoing a higher degree of cross-linking, as a result of a reduction in chain scission. 

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