Department of Chemistry, Duke University, Durham, North Carolina 27708, United States.
J Am Chem Soc. 2011 Mar 16;133(10):3222-5. doi: 10.1021/ja107645c. Epub 2011 Feb 22.
Tension along a polymer chain traps neighboring s-trans/s-trans-1,3-diradicals from the mechanically induced ring opening of gem-difluorocyclopropanes (gDFCs). The diradicals correspond to the transition states of the force-free thermal isomerization reactions of gDFCs, and the tension trapping allows a new disproportionation reaction between two simultaneously trapped diradicals to take place.
聚合物链上的张力会捕获相邻的 s-顺式/s-反式-1,3-二自由基，这些二自由基来自于手性双氟环丙烷（gDFCs）的机械诱导开环。这些二自由基对应于 gDFCs 自由能热异构化反应的过渡态，而张力捕获允许两个同时捕获的二自由基之间发生新的歧化反应。
