Bonds, creation, mechanically-induced

Fig. 6 Activation of gDBCs and subsequent bond creation in the solid state (a) under extrusion of poly(gDBC) in the presence of chloride, 250 chloride substitutions occur on the mechanically generated 2,3-dibromoalkene for every 9 chain scissions (b) extrusion of poly(gDBC) in the presence of a dicarboxylate leads to force-induced cross-linking. Reprinted with permission from [43] (Copyright Nature Publishing Group 2013) and [46] (Copyright The Royal Society of Chemistry 2011)...

Fig. 10 Towards new mechanophores for bond creation the bicyclo[3.2.0]-heptanes. The alpha, beta-unsaturated ester formed from mechanically induced [2+2] cycloreversion can undergo subsequently react with nucleophiles (a), such as thiols to form functionalised copolymers left) and cross-linked gels (right). Analysis of the stereoisomerism of the products (b) supported a stepwise mechanism for the ring-opening via a 1,4-diradical intermediate...

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