Nurcan Acar

A kinetic study of mercury(II) transport through a membrane assisted by new transport reagent

BackgroundA new organodithiophosphorus derivative, namely O-(1,3-Bispiperidino-2-propyl)-4-methoxy phenyldithiophosphonate, was synthesized and then the kinetic behavior of the transport process as a function of concentration, temperature, stirring rate and solvents was investigated.ResultsThe compound 1 was characterized by elemental analysis, IR, 1H and 31P NMR spectroscopies. The transport of mercury(II) ion by a zwitterionic dithiophosphonate 1 in the liquid membrane was studied and the kinetic behavior of the transport process as a function of concentration, temperature, stirring rate and solvents was investigated. The compound 1 is expected to serve as a model liquid membrane transport with mercury(II) ions.ConclusionA kinetic study of mercury(II) transport through a membrane assisted by O-(1,3-Bispiperidino-2-propyl)-4-methoxy phenyldithiophosphonate was performed. It can be concluded that the compound 1 can be provided a general and straightforward route to remove toxic metals ions such as mercury(II) ion from water or other solution.

Dimethyl [hydr­oxy(2-nitro­phen­yl)meth­yl]phospho­nate

In the title compound, C9H12NO6P, intramolecular C—H⋯O hydrogen bonds form five- and six-membered rings. In the crystal, inversion dimers lined by pairs of C—H⋯O hydrogen bonds occur with ring motifs R 2 2(10). The O atom of the hydroxy group behaves as an accepter and the benzene ring as donor. Adjacent dimers are connected through O—H⋯O links.

Dimethyl (1-hydr­oxy-1,2-diphenyl­ethyl)phospho­nate

In the molecule of the title compound, C16H19O4P, the coordination around the P atom is distorted tetrahedral. The aromatic rings are oriented at a dihedral angle of 72.28 (11)°. Intramolecular C—H⋯O hydrogen bonding result in the formation of five- and six-membered rings. In the crystal structure, intermolecular C—H⋯O hydrogen bonds link the molecules. There is also a weak C—H⋯π interaction.

Synthesis and Spectroscopic Characterization of Novel Aryl-Dithiofluorophosphonate Derivatives and X-Ray Studies of [(4-CH3OC6H4)(F)P(S)S−][PH4P+]

Abstract Potassium and tetraphenylphosphonium salts of novel aryldithiofluorophosphonic acids were synthesized. Lawessons Reagent was allowed to react with KF in acetonitrile to yield the potassium salt of p-methoxyphenyldithiofluorophosphonic acid. Treatment of the latter with tetraphenylphosphonium chloride resulted in the formation of the tetraphenylphosphonium salt. The structures of the compounds were elucidated by FTIR, 1H, 13C, 19F, and 31P NMR spectroscopy as well as by ESI-mass spectrometry. The molecular and crystal structure of the tetraphenylphosphonium salt, determined by single crystal X-ray diffraction, is also presented. Supplemental materials are available for this article. Go to the publishers online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT

Diethyl (1-hydr­oxy-1-phenyl­ethyl)phospho­nate

The title compound, C12H19O4P, has a distorted tetrahedral geometry around the P atom. The molecules form dimers with R 2 2(10) ring motifs due to intermolecular O—H⋯O hydrogen bonds. The double-bonded O atom of the phosphonate group behaves as an acceptor and the hydroxy group acts as a donor. Both of the ethyl groups are disordered with occupancies of 0.55:0.45 and 0.725:0.275.

Syntheses and structural characterizations of a new benzyl(4-methoxyphenyl)dithiophosphinic acid and its Ni(II), Co(II), Zn(II), Cd(II), and Ni–pyridine complexes

GRAPHICAL ABSTRACT Abstract Benzyl(4-methoxyphenyl)dithiophosphinic acid (HL) was obtained as solid and was treated with the NiCl26H2O, CoCl26H2O, ZnCl2, and CdCl2 to prepare its Ni(II), Co(II), Zn(II), and Cd(II) complexes. The nickel complex was further treated with pyridine which led to the formation of octahedral dipyridine derivative. HL was obtained through the addition reaction of the perthiophosphonic acid anhydride Lawesson reagent, (LR), [2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide], with the corresponding Grignard compound (benzylmagnesium bromide) in diethyl ether medium. The complexes were all of the stoichiometry of [M(L)2]x, with x = 1 for M = Ni2+ and x = 2 for M = Co2+, Cd2+ and Zn2+. The coordination geometry was square planar in the nickel(II) complex and tetrahedral in the others. Similar to many other nickel(II) complexes, the Ni(L)2 reacts reversibly with pyridine to yield the octahedral complex ({(Py)2Ni(L)2}). The compounds were characterized by elemental analysis; MS, FTIR, and Raman spectroscopies. The magnetic susceptibilities of the complexes were measured to confirm the hybridization patterns and the geometries. Single-crystal X-ray analyses of Ni(L)2 and [Co(L)2]2 complexes were also carried out to prove the molecular topologies.

Diethyl (1-hydroxy-1,2-diphenylethyl)phosphonate

In the title compound, C18H23O4P, the dihedral angle between the aromatic ring planes is 69.94 (14)°. Both ethyl side chains are disordered over two sets of sites, with occupancy ratios of 80:20 and 70:30. In the crystal, inversion dimers linked by pairs of O—H⋯O hydrogen bonds occur, leading to R 2 1(8) loops, and C—H⋯O and weak C—H⋯π interactions are also seen.

Syntheses and structural characterization of new dithiophosphinato cadmium complexes

AbstractNew cadmium complexes of 4-methoxyphenyl dithiophosphinic acids, H3CO-C6H4-(R)PS2H were prepared. The five dithiophosphinato ligands (L) involved were of the general structure H3CO-C6H4-(R)PS2−

Dimethyl (2-hydr­oxy-4-phenyl­but-3-en-2-yl)phospho­nate

_{\mathrm {2}}^{\mathrm {-}}

Synthesis, structure and magnetic properties of homotrinuclear Ni(II) complexes with asymmetric Schiff-base ligands

with R = 3-methylbutyl, (L1); n-butyl, (L2); 2-methylpropyl, (L3); 1-methylpropyl, (L4) and 2-propyl, (L5). To the best of our knowledge, this is the first report on the preparation and characterization of the n-butyl- derivative. The acid forms of the ligands were obtained by treatment of the Lawesson reagent, (LR) [2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide] with the corresponding Grignard reagent in dry diethylether. The acids formed were transformed into easily crystallizable ammonium salts (NH4L) for purification. These salts were treated with CdCl2 in ethanol at room temperature to produce the bis-dithiophosphinato cadmium complexes ([Cd(L)2]2) exclusively. The structures of the complexes were elucidated by elemental analysis, MS, FTIR and Raman spectroscopy techniques as well as 1H-, 13C- and 31P- NMR. The crystal structures of [Cd(L1)2]2 and [Cd(L2)2]2 were also studied as examples. X-ray studies confirmed the nonplanar, four-coordination geometry of the complexes and indicate that electron delocalization prevails in the PS2−