Annelated macrocyclic polyradicals

Dendritic-macrocyclic polyradicals 181 Macrocyclic-macrocyclic polyradicals 184 Annelated macrocyclic polyradicals 186... 

Annelated macrocyclic polyradicals consist of calix[4]arene-based macrocycles annelated via bis(3,4 -biphenylene)methyl linkers. This connectivity is consistent with the ferromagnetic-ferrimagnetic coupling scheme, for which scaling of S with the number of radical sites (or molecular weights) was attained.8,112... 

Rajca, A., Wongsriratanakul, J., Rajca, S. and Cerny, R.L. (2004). Organic spin clusters annelated macrocyclic polyarylmethyl polyradicals and polymer with very high-spin 5= 6-18. Chem. Eur. J. 10, 3144-3157... 

Notably, the Negishi cross-coupling of difunctionalized macrocyclic monomers produced the annelated polyether precursors to polyradicals 54, 55, and 56 in significant isolated yield for each polyether (Fig. 37). This suggested that analogous cross-couplings of multi-functionalized macrocyclic monomers could provide highly cross-linked polymers with fractal dimensionalities beyond one. 

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