Ring Expansion Alkyne Metathesis Polymerization

被引：5

作者：

Beauchamp, Andrew M. ^{[1
]}

Chakraborty, Jhonti ^{[1
]}

Ghiviriga, Ion ^{[2
]}

Abboud, Khalil A. ^{[1
]}

Lester, Daniel W. ^{[3
]}

Veige, Adam S. ^{[1
]}

机构：

[1] Univ Florida, Ctr Catalysis, Dept Chem, Gainesville, FL 32611 USA

[2] Univ Florida, Ctr NMR Spect, Dept Chem, Gainesville, FL 32611 USA

[3] Univ Warwick, Polymer Characterizat Res Technol Platform, Coventry CV4 7AL, England

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2023年 / 145卷 / 41期

基金：

美国国家科学基金会;

关键词：

LINEAR POLY(DIMETHYLSILOXANES); CYCLIC POLYMERS; TUNGSTEN-ALKYLIDENE; TRIPLE BONDS; COMPLEXES; MOLECULES; CRYSTALLIZATION; POLYNORBORNENE; VISCOSITY; CHEMISTRY;

D O I：

10.1021/jacs.3c08717

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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((CBu)-Bu-t)((CH2Bu)-Bu-t)(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, complex 7 is a dimer. Each metal center contains a tungsten-carbon triple bond tethered to the metal center via an alkoxide ligand. The polymerization of the strained cycloalkyne 3,8-didodecyloxy-5,6-dihydro-11,12-didehydrodibenzo[a,e]-[8]annulene, 8, to generate cyclic polymers was demonstrated. Size exclusion chromatography (SEC) and intrinsic viscosity (eta) measurements confirm the polymer's cyclic topology.

引用

页码：22796 / 22802

页数：7

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