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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Metallocalixarene catalysts: alpha-olefin polymerization and ROP of cyclic esters
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Metallocalixarene catalysts: alpha-olefin polymerization and ROP of cyclic esters

机译:Metallocalixarene催化剂:α-烯烃聚合和环酯的ROP

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摘要

This perspective review discusses metallocalix[n] arene complexes that have been employed in either alpha-olefin polymerization or in the ring opening polymerization (ROP) of cyclic esters over the last 5 years. Synthesis, molecular structure and catalytic potential are discussed. For alpha-olefin polymerization, systems based on early transition metals in combination with calix[n] arenes (n = 4, 6 or 8), depleted calix[ 4] arenes or thia/sulfinyl/sulfonyl calix[4] arenes have been reported, and in some cases, are highly active. For the ROP studies, a number of the systems, typically of the early transition metals, only exhibit activity under robust conditions, whereas other systems, for example those of magnesium, demonstrate exceptional activity, immortal behaviour and intriguing stereoselectivity.
机译:该观点综述讨论了在过去5年中已在α-烯烃聚合或环状酯的开环聚合(ROP)中使用的金属局部芳烃[n]芳烃配合物。讨论了合成,分子结构和催化潜力。对于α-烯烃聚合,已经报道了基于早期过渡金属与杯芳烃[n]芳烃(n = 4、6或8),贫化杯芳烃[4]芳烃或硫杂/亚磺酰基/磺酰基杯芳烃[4]芳烃的体系,并且在某些情况下非常活跃。对于ROP研究,许多系统(通常是早期过渡金属)仅在坚固的条件下表现出活性,而其他系统(例如镁)则表现出出色的活性,不朽的行为和令人感兴趣的立体选择性。

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