Palladium(II), Platinum(II), and Copper(I) N-Bonded Complexes with Thiazolidine-2-thione as Ligand

1973 ◽  
Vol 51 (8) ◽  
pp. 1172-1178 ◽  
Author(s):  
D. De Filippo ◽  
F. Devillanova ◽  
E. F. Trogu ◽  
G. Verani ◽  
C. Preti ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Coordination Sphere ◽  
Conductivity Measurements ◽  
Polar Solvents ◽  
Square Planar ◽  
Visible Spectra ◽  
Spectrochemical Series ◽  
Bonded Complexes

The preparation and characterization of the (MttznX2) complexes (where M = Pd; or Pt; ttz = thiazolidine-2-thione; n = 2, 3 or 4; X = Cl, Br, I) are reported. By i.r., p.m.r., and u.v.–visible spectra and by magnetic susceptibility and conductivity measurements it appears that in all complexes the ligand is N-bonded to the metal and that many equilibria are present in polar solvents. In particular, for (Mttz4I2)-derivatives there is an equilibrium between a square-planar and a penta-coordinate species. Furthermore, water is competing with the ligands and counterions in the coordination sphere. Our ligand is placed near water in the spectrochemical series. With copper(I) we have obtained complexes of the type (Cuttz3X) (where X = Cl, Br, I, NO3, ClO4, and [Formula: see text]), and in each case the anion is coordinated to the metal. The ttz molecule in these complexes behaves as a hard-base.

scholarly journals Synthesis and Characterization of Some New Metals Complexes of [N-(4-Nitrobenzoyl Amino)-Thioxomethyl] Phenylalanine

2016 ◽  
Vol 13 (1) ◽  
pp. 113-121
Author(s):  
Baghdad Science Journal
Keyword(s):  
Molecular Structure ◽  
Magnetic Susceptibility ◽  
Palladium Complexes ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
Tetrahedral Geometry ◽  
Visible Spectra ◽  
Ft Ir ◽  
Uv Visible

A new ligand [N-(4-nitrobenzoylamino)-thioxomethyl] phenylalanine is synthesized by reaction of 4-nitrobenzoyl isothiocyanate with phenylalanine (1:1). It is characterized by micro elemental analysis (C.H.N.S.), FT-IR, (UV-Vis) and 1H and 13CNMR spectra. Some metals ions complexes of this ligand were prepared and characterized by FT-IR, UV-Visible spectra, conductivity measurements, magnetic susceptibility and atomic absorption. From results obtained, the following formula [M(NBA)2] where M2+ = Mn, Co, Ni, Cu, Zn, Pd, Cd and Hg, the proposed molecular structure for these complexes as tetrahedral geometry, except copper and palladium complexes are have square planer geometry.

Synthesis and Characterization of Palladium(II) Complexes with Substituted Dihydrobenzoimidazoquinazoline Derivatives

2016 ◽  
Vol 15 (2) ◽  
pp. 17-32
Author(s):  
Rita Bhattacharjee
Keyword(s):  
Thermal Analysis ◽  
Biological Activity ◽  
Mass Spectra ◽  
Molar Conductivity ◽  
Synthesis And Characterization ◽  
Planar Geometry ◽  
Conductivity Measurements ◽  
Square Planar

A series of palladium(II) halo complexes of the types[PdX2L2].nH2O {n = 0, X = Cl, L = L4and L6; X = Br, L = L3,L4, L5 and L6; n = 2, X = Cl, L = L3and L7, X = Br, L = L1};Pd2X4L2 {X = Cl, Br, L = L2 and L8} and Pd2X4L3 [X = Cl, L= L1; X = Br, L = L7] were prepared where L is 6-R-5,6-dihydrobenzoimidazo quinazoline (R-Diq; where R =phenyl: L1/furyl: L2/thiophenyl: L3/o- or phydroxyphenyl: L4, L5/o- or p-chlorophenyl: L6,L7/dimethylaminophenyl: L8and characterized byelemental analyses, molar conductivity measurements,TGA, infrared, electronic, NMR and mass spectraltechniques. Based on these studies, monomeric/dimericstructure with a square planar geometry around the metalion was proposed for these complexes. Anti-microbialactivity for some of the synthesized complexes wereinvestigated.Keywords: dihydrobenzoimidazoquinazoline, palladium(II),thermal analysis, mass spectra, biological activity.

Synthesis, reactivity and characterization of Pt(ii) complexes with N,N′ chelating ligands; structure and dimethylsulfoxide reactivity relationship

2017 ◽  
Vol 46 (5) ◽  
pp. 1467-1480 ◽  
Author(s):  
Konstantinos Ypsilantis ◽  
Theodoros Tsolis ◽  
Andreas Kourtellaris ◽  
Manolis J. Manos ◽  
John C. Plakatouras ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Chelating Ligands ◽  
Square Planar

Chelated N-heterocycles can be replaced from the coordination sphere of square planar Pt(ii) complexes by DMSO.

Synthesis and Characterization of Palladium(II) Complexes with Substituted Dihydrobenzoimidazo Quinazoline Derivatives

2017 ◽  
Vol 13 (2) ◽  
pp. 1-15
Author(s):  
Rita Bhattacharjee Virupaiah Gayathri
Keyword(s):  
Metal Ion ◽  
Synthesis And Characterization ◽  
Planar Geometry ◽  
Conductivity Measurements ◽  
Spectral Techniques ◽  
Mass Spectral ◽  
Square Planar ◽  
Elemental Analyses ◽  
Quinazoline Derivatives

A series of palladium(II) halo complexes of the types [PdX 2 L 2 ].nH 2 O {n = 0, X = Cl, L = L 2 , L 4 and L 5 ; X = Br, L = L 2 ; n = 1, X = Cl, L = L 1 and L 3 } and Pd 2 X 4 L 3 [X = Br, L = L 1 , L 3 , L 4   and L 5 ] were prepared where L is 6-R-5,6- dihydrobenzoimidazo quinazoline (R-Diq; where R = ethyl: L 1 / n or i-propyl: L 2 , L 3 / n or i-butyl: L 4 , L 5 ) and characterized by elemental analyses, conductivity measurements, TGA, infrared, electronic, NMR and mass spectral techniques. Based    on these studies monomeric/dimeric structure with a square planar geometry around the metal ion was proposed for all the complexes. Some of the complexes were investigated for anti-microbial activity.

Synthesis and Characterization of Cu(I) Complex Compounds With Methyl Isonicotinate

1975 ◽  
Vol 53 (17) ◽  
pp. 2657-2663 ◽  
Author(s):  
Mohamed A. S. Goher
Keyword(s):  
Charge Transfer ◽  
Analytical Data ◽  
Complex Compounds ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
Visible Spectra

The preparation of Cu(I) complexes of methyl isonicotinate, MeIN, of the formula (MeIN)nCuX, in which n = 1,2, 3, and 4 and X is Cl, Br, I, CN, SCN, and ClO4, has been described. The isolated complexes are characterized by their analytical data, diamagnetism, and conductivity measurements. The M → L charge transfer bands in the visible spectra and the i.r. spectra of these complexes are discussed.

Magnetic Properties and Crystal Structure of a 3,5-Dimethylpyrazolate-Bridged Binuclear Copper(II) Complex

2001 ◽  
Vol 56 (10) ◽  
pp. 970-974 ◽  
Author(s):  
Y. Elerman ◽  
A. Elmali
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Dihedral Angle ◽  
Coordination Sphere ◽  
Magnetic Moment ◽  
Binuclear Copper ◽  
Temperature Dependent ◽  
Orthorhombic Space Group ◽  
Square Planar

[Cu2L(prz)] (prz = 3,5-dimethylpyrazole and L = 1,3-bis(5-bromo-2-hydroxybenzylidene)- propan-2-ol) was synthesized and its crystal structure determined. It crystallizes in the orthorhombic space group Pbca with a = 14.160(9), b = 15.109(4), c = 21.298(5) Å, V = 4557(1) A3, Z = 8 . Two copper(II) ions are in a square-planar coordination. The metal coordination sphere is four-coordinate, with a planar N2O2 donor set. The dihedral angle between the two coordination planes is 12.14(7)°. The copper(II) centers are separated by 3.365(1) Å and antiferromagnetically coupled (J = -214.3 cm-1), which follows from temperature-dependent magnetic susceptibility measurements in the temperature range 4.6 to 310 K. The Cu-O-Cu angle is 125.9(1)° in the super-exchange pathway. The magnetic moment at 310 K is ca. 1.76 B.M. and 0.13 B.M. at 4.6 K.

scholarly journals Metal ion promoted synthesis of pentaazamacrocyclic complexes of a few first row transition metal series derived from 2,6-diaminopyridine

2005 ◽  
Vol 70 (11) ◽  
pp. 1273-1281
Author(s):  
Ali Khan ◽  
Shabana Tabassum ◽  
Nishat Begum ◽  
Poonam Chingsubam
Keyword(s):  
Magnetic Susceptibility ◽  
Transition Metal ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Metal Ion ◽  
Condensation Reaction ◽  
Spectroscopic Techniques ◽  
Conductivity Measurements ◽  
Template Condensation ◽  
Square Planar

Anew series of dichloro/dinitrato (2,6,9,13,18-pentaazacbicyclo [12.3.1]octadeca -1(18),14,16-triene) metal(II) [MLX2](M = Mn(II), Co(II), Ni(II) and Zn(II); X = Cl or NO3) and (2,6,9,13,18-pentaazacyclo[12.3.1]octadeca-1(18),14,16-triene) copper(II) dichloride/dinitrate [CuL]X2 (X = Cl or NO3) have been synthesized by the template condensation reaction of 2,6-diaminopyridine with 1,2-diaminoethane and 1,3-dibromopropane. The complexes were studied by elemental analysis, magnetic susceptibility and conductivity measurements. Various spectroscopic techniques, viz. IR, 1H-NMR, EPR, UV/Vis, were used to establish their structures. Except for the complexes of copper(II), which are square planar, all other complexes have octahedral structures.

The Structure and Stability of Ni(II) Complexes of Thiourea and Related Ligands

1975 ◽  
Vol 53 (5) ◽  
pp. 633-643 ◽  
Author(s):  
D. R. Eaton ◽  
K. Zaw
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Resonance ◽  
Exchange Rates ◽  
Relative Stability ◽  
Ligand Exchange ◽  
Metal Ion ◽  
Proton Magnetic Resonance ◽  
Conductivity Measurements ◽  
Square Planar ◽  
Ethylene Thiourea

A number of Ni(II) complexes of thiourea, N-methylthiourea, N,N′-dimethylthiourea, N-naphthylthiourea, N,N′-diethylthiourea, and ethylene thiourea have been studied in acetone solution by proton magnetic resonance, magnetic susceptibility measurements, and conductivity measurements. In solution these complexes have tetrahedral, square planar, and octahedral geometries. In many cases equilibria between compounds with different geometries exist. Such equilibria have been studied as a function of temperature. The factors determining the relative stability of Ni(II) compounds with different geometries are discussed. In the present series of compounds it is concluded that the charge on the metal ion has the predominant influence in determining geometry. Some qualitative results on ligand exchange rates and mechanisms are also reported.

scholarly journals Synthesis and Characterization of New Metal Complexes of α-Aminonitriles Derived from P- Toluidine and Aromatic Aldehydes

2010 ◽  
Vol 7 (3) ◽  
pp. 1214-1225
Author(s):  
Baghdad Science Journal
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Susceptibility ◽  
Transition Metal ◽  
Metal Complexes ◽  
Aromatic Aldehydes ◽  
Transition Metal Ions ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
Phenyl Acetonitrile

New metal complexes of some transition metal ions Co(II), Cu(II) , Cd(II) and Zn(II) were prepared by their reaction with previously prepared ligands HLI= (P-methyl anilino) phenyl acetonitrile and HLII = (P-methyl anilino) –P– chloro phenyl acetonitrile . The two ligands were prepared by Strecker’s procedure which includ the reaction of p- toluidine with benzaldehyde and P- chlorobenzaldehyde respectively. Structures were proposed depending on atomic absorption , i.r. and u.v.visible spectra in addition to magnetic susceptibility and electrical conductivity measurements.

scholarly journals Preparation and Characterization of Cyano Complexes of Oxotungsten(IV) with Mannich Base Ligands

2010 ◽  
Vol 7 (s1) ◽  
pp. S231-S238
Author(s):  
Mohita Sharma ◽  
Mohd Saleem ◽  
Balgar Singh ◽  
H. N. Sheikh ◽  
B. L. Kalsotra
Keyword(s):  
Aqueous Solution ◽  
Magnetic Susceptibility ◽  
Elemental Analysis ◽  
Mannich Base ◽  
Conductivity Measurements ◽  
H Nmr ◽  
Cesium Salts ◽  
Dta Studies ◽  
Cyano Complexes

Oxocyanotungsten(IV) complexes, (Ph3P)2NH2[WO(CN)3L–L]. 3H2O and Cs[WO(CN)3L–L].H2O (where L–L = morpholinobenzyl benzamide (MBB), piperidinobenzyl benzamide (PBB), piperidinobenzyl urea (PBU), piperidinobenzyl thiourea (PBTU), morpholinobenzyl urea (MBU) and morpholinobenzyl thiourea (MBTU)) were synthesized. The complexes have been prepared by the reaction of K3Na [WO2(CN)4].6H2O with morpholinobenzyl urea and related ligands in aqueous solution around pH of 7-8. These have been isolated as bis(triphenylphosphine)iminium or cesium salts. The complexes have been characterized by elemental analysis, IR,1H NMR, UV-Vis spectra, magnetic susceptibility, conductivity measurements and TGA/DTA studies.

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