Ethyl vinyl ether (EVE) polymerizations by rare-earth metal complexes were studied. The metallocene complexes 1–3 activated by organoborate displayed extremely high catalytic activities (≤1.50 × 10⁶ g mol⁻¹ h⁻¹) for EVE polymerization at 25 °C. The non-metallocene complexes 4–6 were nearly inert under the same conditions. The resultant molecular weights produced by 1/[Ph₃C][B(C₆F₅)₄] increased from 2.98 × 10⁴ to 19.3 × 10⁴ g mol⁻¹ with the temperature declining from 0 to −45 °C and the addition of 10 equivalents of AlⁱBu₃ to the binary system 1/[Ph₃C][B(C₆F₅)₄] resulted in the higher molecular weight product (32.5 × 10⁴ g mol⁻¹) at −45 °C. With the molar ratio of EVE-to-1 increased from 2000:1 to 10000:1, the resultant molecular weight reached 107.3 × 10⁴ g mol⁻¹ but the catalytic activity dropped dramatically from 7.60 × 10⁵ to 0.57 × 10⁵ g mol_Sc⁻¹ h⁻¹. The dicationic species formed by the reaction of 1 with 2 equivalents of [Ph₃C][B(C₆F₅)₄] displayed high catalytic activity for EVE polymerization and gave high molecular weight product in the presence of AlⁱBu₃.

研究了稀土金属络合物对乙基乙烯基醚（EVE）的聚合作用。的茂金属配合物1 - 3由有机硼酸激活显示极高的催化活性（≤1.50×10 ⁶ 克摩尔^-1  ħ ^-1在25 EVE聚合）℃。非茂金属络合物4 - 6几乎惰性相同的条件下。由1 / [Ph ₃ C] [B（C ₆ F ₅）₄ ]产生的所得分子量从2.98×10 ⁴增加到19.3×10 ⁴  g mol ^-1温度从0下降到-45°C，向二元体系1 / [Ph ₃ C] [B（C ₆ F ₅）₄ ]中添加10当量的Al ⁱ Bu ₃导致分子量更高的产物（32.5×10 ⁴  g mol ^-1）在-45°C下。随着EVE- 1的摩尔比从2000：1增加到10000：1，所得分子量达到107.3×10 ⁴  g mol ^-1，但催化活性从7.60×10 ⁵急剧下降至0.57×10 ⁵  g摩尔_Sc ^-1 h ^-1。通过该反应形成的双阳离子种类1与2个当量的[PH ₃ C] [B（C ₆ ˚F ₅）₄ ]中显示高的催化活性为EVE聚合和得到高分子量产物在Al的存在^我卜₃。