作者:Andrew M. Beauchamp、Jhonti Chakraborty、Ion Ghiviriga、Khalil A. Abboud、Daniel W. Lester、Adam S. Veige
DOI:10.1021/jacs.3c08717
日期:2023.10.18
The synthesis, characterization, and preliminary activity of an unprecedented tethered alkylidyne tungsten complex for ring expansion alkyne metathesis polymerization (REAMP) are reported. The tethered alkylidyne 7 is generated rapidly by combining alkylidyne W(CtBu)(CH2tBu)(O-2,6-i-Pr2C6H3)2 (6) with 1 equiv of an yne-ol proligand (5). Characterized by NMR studies and nuclear Overhauser effect spectroscopy
报告了用于扩环炔复分解聚合(REAMP)的前所未有的束缚亚烷基钨络合物的合成、表征和初步活性。通过将亚烷基 W(C t Bu)(CH 2 t Bu)(O-2,6- i - Pr 2 C 6 H 3 ) 2 ( 6 ) 与 1 当量的炔醇结合,可以快速生成束缚亚烷基7配体( 5 )。通过 NMR 研究和核奥沃豪塞效应光谱表征,复合物7是二聚体。每个金属中心都包含一个钨碳三键,通过醇盐配体与金属中心相连。证明了应变环炔3,8-二十二烷氧基-5,6-二氢-11,12-二脱氢二苯并[ a , e ]-[8]轮烯8的聚合反应生成环状聚合物。尺寸排阻色谱 (SEC) 和特性粘度 (η) 测量证实了聚合物的环状拓扑结构。