Poly resonance spectrum, nuclear

Figure 1. Carbon-13 nuclear magnetic resonance spectrum for poly(VPAVG). All assignments are given demonstrating the correct synthesis, and the absence of extraneous peaks verifies the purity of the synthesis.

Nuclear magnetic resonance has proved to be a valuable tool in determination of configurational sequences in poly(MMA) (14). In Figure 3 is shown the NMR of poly(MMA) synthesized with an anionic polymerization catalyst known to produce predominantly isotactic sequences. In these polymers, the NMR spectrum of the methylene units In the polymer backbone gives an unequivocal determination of tacticity. The methylene signal, occurring about 1.8... 

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