Abstract
Migration insertion polymerization (MIP) of organometallic monomers, PFpCX [PFp = (PPh2(CH2)3Cp)Fe(CO)2, CX = (CH2)X-1CH3, X = 12 or 18] was performed under various conditions. The oligomerization occurred in accompany with the monomer cyclization generating PFpCX small rings at the early stage, which was followed by a complete cyclization of the oligomers generating P(PFpCX)n macrocycles. PFpCX small rings could be completely removed via precipitating the crude products in a poor solvent for the macrocycles. The solution and bulk MIP of PFpCX (X = 12 or 18) had a similar cyclization rate but both were significantly accelerated at a higher MIP temperature (100 °C). It is explained by the temperature-dependent tendency for the cyclization. The dependence of degree of polymerization (DP) on the MIP conditions was discussed and the self-assembly of resultant P(PFpC12)n was examined.
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