A co-crystallised coordination system that exhibits two different bis(O2S2 macrocycle) palladium(II) complexes in one single-crystal

Two dibenzo-O2S2 macrocycles (L1: 15-membered, L2: 14-membered analogue) were employed as soft donor ligands towards palladium(II). Two-step approach via reaction of 1:1-type complex, [cis-Cl2(L1)Pd], with L2 through a successive treatment of AgClO4 has led to the isolation of a co-crystallised bis(O2S2 macrocycle) palladium(II) complex 1, {[Pd(L1)2] · [Pd(L2)2]}(ClO4)4 containing two different homo-ligand bis(O2S2 macrocycle) analogues. In solution, on the other hand, formation of the mixed-ligand bis(O2S2 macrocycle) complex [Pd(L1)(L2)]2+ was also confirmed by electro-spray ionisation mass spectrometry.