A deep tetranuclear metallo-cavitand with bis(aryl) palladium bridges

A neutral metallo-cavitand based on cis bis-perhaloaryl Pd(II) bridges co-ordinated at the corners of a deep calix[4]arene. Both the metallo-cavitand and its inclusion complexes with other calix[4]arenes were investigated by means of ¹H and ¹⁹F NMR experiments.