Co-crystals involving C-methylcalix[4]resorcinarene 1 and substituted pyrid
ines obtained from MeNO2-benzene and MeCN-benzene yields multi-component co
mplexes 1.4(4-picoline).MeNO2 2 and 1.4(1,10-phenanthroline).MeCN.benzene 3
in which the cavity of 1 is extended by four pyridines supramolecularly an
d the included solvent serves as a guest.