Palladium Catalyzed Vinyl Addition Poly(norbornenes): Formic Acid as a Chain Transfer Agent. Mechanism and Polymer Optical Properties

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Polymers of substituted norbornenes were produced using palladium catalysts in the presence of formic acid (FA) as a chain transfer agent (CTA) which act to control molecular weight as well as to increase conversion. Spectroscopic analysis of these polymers by 1H NMR and MALDI-TOF MS confirmed that hydrogen-terminated polynorbornenes are generated leading to extremely low optical densities at 193 nm. Deuterium labeling studies were conducted in order to discern possible chain transfer mechanisms.

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