Quantitative correlation between the pseudo-cavity volume of the p-tert-butylcalix[4]arene tetra-acetamide and the ionic radius of the cationic guests

摘要

The volume of the hydrophilic pseudo-cavity of the host p-tert-butylcalix[4]arene tetra-acetamide from single-crystal X-ray data shows a linear increase with respect to the increase inthe ionic radius of hte guests Ni~(+2),Cu~(+2),Zn~(+2),Fe~(+2),Pb~(+2),Na~+ and K~+.The preliminary model provides a unified and reasonably good description of the interaction between a host and its guest.