Tetraradicals star-branched

Three limiting topologies, based upon 1,3-phenylene coupling unit, can be considered for Class I polyarylmethyl tetraradicals quasi-linear, star branched, and macrocyclic (calix[4]arene based). Structures of polyarylmethyl tetraradicals are illustrated in Fig. 19. 

Star-branched tetraradicals 33-35 possess S — 2 ground states, with relatively strong ferromagnetic couplings, as determined by EPR spectroscopy and magnetization studies (Fig. 21).61,87 EPR spectra for sterically hindered tetraradicals were... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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