1. The methods can be applied to copolymers. However, microstructure determination is decidedly more complex
2. Carbon-13 Nuclear Magnetic Resonance Analysis of Tail-to-Tail Monomeric Units and of Saturated End Groups in Polypropylene
3. Regioirregular insertion is believed to result in a dormant Ti site, ultimately resulting in chain transfer/termination with hydrogen or aluminum alkyl. Thus, while regioirregular insertion is infrequent, it plays a large role in the control of the molecular weight distribution and the effectiveness of hydrogen in molecular weight control. See: F. Shimizu, J.T.M. Pater, P.M. van Swaaij, G.J. Weickert, J. Appl. Polym. Sri. 83, p. 2669, 2002 and references therein; J.C. Chadwick, F.P.T.J. van der Burgt, S. Rastogi, V. Busico, R. Cipullo, G. Talarico, J.J.R. Heere Macromolecules , 37, 9722-9727, 2004
4. In principle the last inserted monomer, which generates a chiral teriary carbon, can control chirality in the next inserted monomer, but experimental evidence, principally from C 13 NMR, is consistent with control at the catalytic center