Square planar metal complexes of thiosemicarbazide

1968 ◽  
Vol 46 (20) ◽  
pp. 3241-3247 ◽  
Author(s):  
Roland A. Haines ◽  
Kenneth K. W. Sun
Keyword(s):  
Metal Complexes ◽  
General Formula ◽  
Trans Isomer ◽  
Diffuse Reflectance ◽  
Geometric Isomers ◽  
Neutral Species ◽  
Diffuse Reflectance Spectra ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Cis And Trans

Square planar complexes of nickel(II), palladium(II), and platinum(II) containing the ligand thiosemicarbazide (Htsc) have been studied. Both the cis and trans geometric isomers have been obtained for the complexes with the general formula [M(tsc)2]2+ while only the trans isomer was obtained for the neutral species [M(tsc)2]. Infrared and diffuse reflectance spectra are presented and discussed with reference to the stereochemistry of the complexes.

scholarly journals Synthesis and characterization of new complexes of Co+2 , Ni+2 , Cu+2 and Zn+2 with (Sodium acetate thio ) ethylene ligands

2013 ◽  
Vol 10 (3) ◽  
pp. 650-657
Author(s):  
Baghdad Science Journal
Keyword(s):  
Content Analysis ◽  
General Formula ◽  
Metal Content ◽  
Sodium Acetate ◽  
Magnetic Measurement ◽  
Synthesis And Characterization ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Uv Visible

This research involves the preparation of new ligands 1,1,2,2- tetrakis (sodium acetate thio)ethylene(L1) and 1,1,2- tris(sodiumacetatethio) ethylene(L2), through the reaction of disodium thioglycolate) with tetra chloro ethylene or tri chloro ethylene in (1:4) or (1:3) moler ratio . Homodinucliar complexes of general formlu [M2(L1)] and [M2(L2)ClH2O] , when M= Co(II), Ni(II), Cu (II) and Zn(II) also mono nuclear complexes of general formula [M(L2)] . The prepared complexes were characterized using spectral method (UV/Visible/ IR) , metal content analysis , magnetic and atomic measurements . The spectral and magnetic measurement indicats that some complexes have tetrahedral or square planar complexes environtment .

Some tertiary arsine complexes of platinum and palladium

1974 ◽  
Vol 27 (12) ◽  
pp. 2557 ◽  
Author(s):  
Gowda NM Nanje ◽  
GKN Reddy
Keyword(s):  
Carbon Monoxide ◽  
General Formula ◽  
Platinum Complexes ◽  
Carbonyl Complexes ◽  
Square Planar ◽  
Tertiary Arsine ◽  
Square Planar Complexes

A series of square-planar complexes of platinum and palladium of the general formula MX2L2, where M is Pt or Pd, X is Cl, Br or I, and L is EtPh2As or PrPh2As, have been made. The platinum complexes (X = Cl or Br) react with the corresponding halogens to give octahedral complexes of the type PtX4L2. The dichloro complexes of platinum(II) react with carbon monoxide to give carbonyl complexes of the type trans- [PtCl(CO)L2]+. Structures have been assigned to all the compounds.

Chlorine nuclear quadrupole resonance in some chloro complexes of divalent copper

1971 ◽  
Vol 24 (10) ◽  
pp. 1993 ◽  
Author(s):  
DE Scaife
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Covalent Bonding ◽  
Divalent Copper ◽  
Chloro Complexes ◽  
35Cl Nucleus ◽  
Square Planar ◽  
Bonding Interaction ◽  
Quadrupole Resonance ◽  
Square Planar Complexes ◽  
Nuclear Quadrupole

Nuclear quadrupole resonance for the 35Cl nucleus has been observed in some chloro complexes of divalent copper. Square-planar complexes each show two resonance lines, with the following frequencies (at 77�K): (CH3NH3)2CuCl4, 10.780, 12.157 MHz; (C2H5NH3)2CuCl4, 10.817, 12.074 MHz; (enH2)CuCl4, 10.271, 11.901 MHz; and (C3H7NH3)2CuCl4 at 223�K, 11.290 and 11.781 MHz. NH4CuCl3, containing dimeric Cu2Cl62- units, has resonances, at 77�K, at 11.907, 11.993, and 12.448 MHz. The trigonal pyramidal anion in Co(NH3)6CuCl5 has two resonances at 9.642 and 10.352 MHz at 77�K. ��� These results are compared with previous results for copper chloro complexes, and the implications of covalent bonding are discussed. In particular, it is suggested that the long-bond interaction between units in square-planar complexes amounts to 7-16% of the bonding interaction within the units.

Complexes of hybrid ligands. The synthesis of a thioanisole-substituted fluoro-alcohol and its complexes with Pd2+ and Pt2+; the structure of a palladium(II) complex containing alkoxide, phosphine, thioether, and chloride donors

1987 ◽  
Vol 65 (4) ◽  
pp. 798-803 ◽  
Author(s):  
René T. Boeré ◽  
David E. Esser ◽  
Christopher J. Willis ◽  
Douglas W. Stephan ◽  
Taras W. Obal
Keyword(s):  
Least Squares ◽  
Dihedral Angle ◽  
Chelate Ring ◽  
Monoclinic Space Group ◽  
Structural Determination ◽  
Bond Lengths ◽  
Square Planar ◽  
Planar Molecules ◽  
Hybrid Ligands ◽  
Cis And Trans

The compound 2-thioanisole-1,1,1,3,3,3-hexafluoro-2-propanol, CH3S—C6H4—C(CF3)2OH, HL2, has been prepared, and shown to act (in the ionized form) as a hybrid, chelating, ligand. Neutral bis-complexes M(L2)2 are formed with Pd2+ and Pt2+; the former reacts with PdCl42− to give the Cl-bridged dinuclear complex (L2)Pd(μ-Cl)2Pd(L2), which may in turn be cleaved by PPh3 or PPh2Me to give PdCl(L2)(PR3).A complete structural determination has been made for PdCl(L2)(PPh2Me); C23H20ClF6OPPdS. Crystals are monoclinic, space group P21/n, a = 15.526(5), b = 12.966(9), c = 12.900(8) Å, β = 101.84°, V = 2542(2) Å3, Z = 4. Least-squares refinement on F of 198 variables using 2801 observations converged at R1 = 0.0434, R2 = 0.0559. The complex consists of discrete square-planar molecules with phosphine and alkoxide trans-disposed. Bond lengths are Pd—O, 2.053(3); Pd—P, 2.242(1); Pd—Cl, 2.323(2); Pd—S, 2.252(2) Å. In the six-membered chelate ring, all atoms with the exception of Pd are close to coplanarity; there is a dihedral angle of 127.9° between the O—Pd—S plane and that of the aromatic ring.Multinuclear nmr measurements are used to show that both cis- and trans-forms of complexes PdCl(L2)(PR3) are present in solution, with inversion at coordinated sulfur occurring much more rapidly in the latter.

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