Abstract
The polymerization of tert-butylacetylene(tBA) by the MoOCl 4 -n-Bu 4 Sn-EtOH (1:1:1) catalyst led to living and stereoregular polymers with narrow molecular weight distributions (M w /M n = 1.12; cis 97%). The living nature of this polymerization was confirmed by the fact that, in toluene at 0 and -30°C, the M n of the polymer increases in direct proportion to monomer consumption, while the molecular weight distribution remains narrow. Similar but some what inferior results were obtained with the MoCl 5 -n-Bu 4 n-EtOH (1:1:1) system (M w /M n = 1.24; cis 90%)
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