Synthesis and Ring-Opening Metathesis Polymerization of a Strained <i>trans</i>-Silacycloheptene and Single-Molecule Mechanics of Its Polymer
作者:Herbert Wakefield、Ilia Kevlishvili、Kelsie E. Wentz、Yunxin Yao、Tatiana B. Kouznetsova、Sophia J. Melvin、Em G. Ambrosius、Abraham Herzog-Arbeitman、Maxime A. Siegler、Jeremiah A. Johnson、Stephen L. Craig、Heather J. Kulik、Rebekka S. Klausen
DOI:10.1021/jacs.3c01004
日期:2023.5.10
approach to strained cycloalkenes. The trans-silacycloheptene (trans-SiCH) was significantly more strained than the cis isomer, as predicted by quantum chemical calculations and confirmed by crystallographic signatures of a twisted alkene. Each isomer exhibited distinct reactivity toward ring-opening metathesis polymerization (ROMP), where only trans-SiCH afforded high-molar-mass polymer under enthalpy-driven