Electron paramagnetic resonance dimeric structures

The one-electron reduction of the salt 333 with sodium in THF forms the stable dithiolyl radical 334 with a 7rt-electron system that is not susceptible to dimerization. However, the radical 334, which is a green solid, whose structure was determined by MS and electron paramagnetic resonance (EPR) spectroscopy, undergoes reversible... 

The known structures largely comprise the rod-like domain of the vimentin dimer, as illustrated in Fig. 3a. However, some segments have unknown structures. Experimental work using diffraction techniques has identified certain structural characteristics, and work based on Electron Paramagnetic Resonance measurements have revealed that the local stiffness of the LI and L2 domains (both helical structures) is close to that of the rod-like domain [65]. There appear to be persistent experimental challenges in identifying the remaining parts of vimentin IF structures. However, the intrinsic limitations in experimental methods call for the development of complementary computational methods that can provide a more controlled condition to assess the relation between the nanostructure and the nanomechanics of this class of materials. 

---