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Study On The Synthesis, Characterization, Crystal Structures And Antibacterial Activities Of Metal Disubstituent-dithiophosphates And Their Complexes With Mixed Ligands

Posted on:2005-07-17Degree:DoctorType:Dissertation
Country:ChinaCandidate:Q L HaoFull Text:PDF
GTID:1101360152465773Subject:Applied Chemistry
Abstract/Summary:PDF Full Text Request
Novel coordination compounds containing P, S, O, N atoms, named transition metal 0,0'- di-substituent dithiophosphates and their mixed complexes with neutral ligands, have been synthesized by the main reactants of P2S5 and alcohol or phenols through solid-liquid phase and solid-solid phase reactions. The used substituents cover iso-propyl (iPr), ethyl (Et), cyclohexyl, allyl, p-tolyl, benzyl (Ph); p-chlorophenyl, 2,4-di-nitrophenyl, a-naphthyl; the neutral ligands containing nitron or other coordination atoms consist of imidazole (Im), pyridine (Py), a-aminopyridine (Apy), 2, 2'-bipyridine (2BiPy), 4, 4'-bipyridine (4BiPy), 1, 10-phenanthroline (Phen), ethylenediamine (En), and triphenylphosphine (PPh3). Metal O, O' -di-substituent dithiophosphates and their mixed complexes were characterized by Infrared spectra (IR), elemental analysis (EA), nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and ultraviolet-visible (UV-vis) spectrophotometry analysis. Single crystals have been determinated by means of X-ray single crystal diffraction, among twenty two sorts of single crystals, nine structures of new complexes with mixed ligands were first reported. The main results were studied as follows:[Ni(p-tolyl2-DTP)2Phen] cystallizes as green prisms in the triclinic crystal system, space group P(-)l, with unit cell parameters a = 1.11819(2) nm, b = 1.20934(2) nm, c = 1.72860(2) nm, α = 107.693(1)°, β= 96.349(1)°, γ= 109.896(1)°. The calculated density is 1.401 Mg/m3 for Z = 2 molecules/unit cell. Nickel atom is coordinated through four S atoms from DTP groups and two N atoms from Phen, forming a distorted octahedron.Blue prisms of {[Cu(n)(En)2](Et2-DTP)2} were crystallized in the monoclinic crystal system, space group of P21/c, with unit cell parameters a = 1.46683(3) nm, b = 0.69409(1) nm, c = 1.35889(1) nm, α= 90°, β= 111.157(1)°, γ=90°. The calculated density is 1.426 Mg/m3 for Z = 2 molecules per unit. Chelated to the copper atom through four N atom are two ethylenediamine groups, forming a square geometry of CuN4. The DTP groups of molecule around the coordination center neutralize the charge of Cu (E) as anions. A network structure of {[Cu(II)(En)2](Et-DTP)2} is formed through the intermolecular hydrogen bonds of N-H ...S.The compound of {[Ni(Im)6](iPr2-DTP)2} crystallizes in the monoclinic spacegroup C 2/c, with a = 2.47585(4) nm, b = 1.14460(2) nm,c = 1.65815(1) nm, α= 90°, β= 112.689(1)°, γ= 90°, Z=4, and calculated density 1.369 Mg/m3 at 293 (2) K. The coordination around the Ni atom, located in an inversion center, is octhaheral with all positions being occupied by tertiary N atoms of the imidazole moieties. Two O, O '-diisopropyl dithiophosphorous anions lie around the NiN6 center.The dimeric compound of [Ag2(allyl2-DTP)2(Phen)2] forms colorless multihydrogen in the monoclinic space group P1, with unit cell parameters a = 0.9828(2) nm,. b = 1.0950(2) nm, c = 1.1187(2) nm, a= 68.31(3)°, β= 74.95(3)°, γ= 65.05(3)°, Z = 2. The crystal structure is comprised of one independent dimer containing two coordination centers. Each Ag atom is coordinated through one of two S atoms from one DTP groups, respectively, and two N atoms from Phen. A double tetrahedral geometry of S2N2Ag-AgN2S2 is bridged through the weak silver-silver interaction.The crystalline compound [Ni(/Pr2-DTP)2(Apy)2] is formed in the monoclinic space group P21/n, with unit cell parameters a = 0.66296(1) nm, b = 1.63605(2) nm, c = 1.46386(2) nm, α= 90°, β = 99.938(1)°, γ = 90°, Z = 2. The Ni atom is located in the coordination center of the chromophore, NiN2S4, forming an octahedral geometry.The complex [Zn(n)(/Pr2-DTP)2Phen] is crystallized in the monoclinic space group C2/c. The unit cell parameters are a = 1.9315(4) nm, b = 1.0438(2) nm, c = 1.6567(3) nm, α= 90°, β= 102.89(3)°, γ= 90°, and the calculated density 1.371 Mg/m3 (for Z = 4). The four-coordinated Zn atom is bonded to two N atoms from the Phen ligand and two S atoms from two DTP groups, leading to the disto...
Keywords/Search Tags:(O,O'-disubstituent dithiophosphato) metal complexes, synthesis, crystal structure, characterization, antibacterial activity
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