Mono-sulfonated derivatives of triphenylphosphine, [NH4]TPPMS and M(TPPMS)2 (TPPMS = P(Ph)2(m-C6H4SO3-); M = Mn2+, Fe2+, Co2+ and Ni2+).: Crystal structure determinations for [NH4][TPPMS]•1/2H2O, [Fe(H2O)5(TPPMS)]TPPMS, [Co(H2O)5TPPMS]TPPMS and [Ni(H2O)6](TPPMS)2•H2O

Preparation of the ammonium salt of TPPMS, [NH4]TPPMS, TPPMS = PPh2(m-C6H4SO3-), greatly enhances water solubility and provides an efficient route to other metal complexes of TPPMS, M(TPPMS)(2) M=Mn2+, Co2+, Fe2+ and Ni2+. For CO2+ and Fe2+ the metal has an octahedral ligand environment with five water molecules and one TPPMS coordinated through the sulfonate oxygen; the second TPPMS is not coordinated. For Ni2+ the octahedral coordination sphere is composed of water molecules and the TPPMS ligands are not coordinated. Structures are fully reported for [NH4]TPPMS . (1)/2H2O and [Fe(H2O)(5)(TPPMS)]TPPMS and partially reported for [Co(H2O)(5)TPPMS]TPPMS and [Ni(H2O)(6)]TPPMS2 . H2O. All of the structures show hydrophobic regions consisting of aromatic rings and hydrophilic regions with hydrogen-bonding interactions.