“…[43][44][45] Both ligands A and enantiomerically pure R,R-B (from now on just B) are obtained in a one-step reaction from commercially available reagents, following literature-reported procedures. [46][47][48][49] These simple building blocks are then combined with [Pd(MeCN) 4 ](BF 4 ) 2 in acetonitrile in a 1 : 1 : 1 ratio, yielding a rather structurally complex heteroleptic cage [Pd 2 A 2 B 2 ](BF 4 ) 4 (namely Pd 2 A 2 B 2 ; Scheme 1b). The assembly forms virtually quantitatively, requires no purification and its structure was confirmed by a number of analytical results, including 1 H-NMR, where we observe a typical downfield shift of protons H a and H 1 of the pyridine donors of A and B, respectively (Fig.…”