1 H NMR spectroscopy was used to characterize the structures of these p(TCN)s and p(TCND)s in more detail (Figure ). Resonances associated with each of the monomer protons could be identified in the polymers. Compared to p(exo-NB) analogs (Supporting Information Section 3), the backbone olefins of p(TCN)s and p(TCND)s were slightly skewed toward the Z configuration: