Symmetrically tetrasubstituted p-nitrocalix[4]arenes: Synthesis, spectra and crystal structures

Symmetrically tetrasubstituted p-nitrocalix[4]arenes are not only important chemical intermediates in calix[4]arene synthesis; these molecules possess important physical properties as well. In this article, synthesis, crystal structures, FTIR, FT Raman and UV–vis spectra for several p-nitrocalix[4]arenes are reported.