| Preparation of the ammonium salt of diphenylphosphinobenzene-m-sulfonate (TPPMS), appreciably enhances water solubility compared to the sodium and potassium salts. The marked increase in solubility provided a route to salts of Mn2+, Fe2+, Co2+, and Ni 2+; crystal structures of the last three are presented. The crystal structures show amphipathic behavior, driven by hydrogen bonding and pi stacking of the aromatic rings. The crystal structures of cis-Pt(Cl) 2(Ni(TPPMS)2), and cis-Pt(Cl)2(styrene) 2 are also presented. The fruitless attempts at catalytic hydration using these ligands with a platinum center are discussed, including the observations of a cis over trans preference for Pt(Cl) 2(L)2 in a range of solvents where L = PPh3, NH4TPPMS, or Ni(TPPMS)2. Synthesis of Pt(Cl)2(DMSO)(NH 4TPPMS) and its design utility for the formation of heterobisphosphine platinum(II) complexes is presented. |
