Fig. 3. Synthetic scheme for the complexes 2a−2d, 3a−6a, and 4e/4f.

Self-assembled coordination cages featuring one or more 3D-cavity constructed by complexation of Pd(NO₃)₂ with appropriate ligand(s) to afford a/b/c/d/e homoleptic complexes; f/g heteroleptic complexes via integrative self-sorting; k mixture of homoleptic complexes via narcissistic self-sorting. Cage-fusion reactions to yield h/i heteroleptic complexes (however, no fusion in the case of j).