Citation: Ryu, Hyunsoo; Park, Ki-Min; Ikeda, Mari; Habata, Yoichi; Lee, Shim Sung (2014). A Ditopic O4S2 Macrocycle and Its Hard, Soft, and Hard/Soft Metal Complexes Exhibiting Endo-, Exo-, or Endo/Exocyclic Coordination: Synthesis, Crystal Structures, NMR Titration, and Physical Properties.. Inorganic chemistry, 53, pp. 4029-4038.