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Abstract
Polymerization of (o-methylphenyl)acetylene (o-MePA) by MoOCl4-n-Bu4Sn-EtOH catalyst in toluene at 0°C provided a cis-rich living polymer; cis 77%, M w/M n=1.21. The polymerization at -30°C gave results similar to those for 0°C, whereas the polymer obtained at 30°C exhibited a broader molecular weight distribution (MWD) and a lower cis content. Among several organotin compounds, only n-Bu4Sn was effective for the living polymerization of o-MePA. The bulkier the alkyl group of alcohols as the third catalyst component, the broader the MWD of the polymer, while the geometrical structure was not affected by the alcohols.
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