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.

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 .

scholarly journals Palladium(II) and platinum(II) mixed ligand complexes of metronidazole and saccharinate or benzisothiazolinonate ligands, synthesis and spectroscopic investigation

2019 ◽  
Vol 24 (6) ◽  
pp. 26 ◽  
Author(s):  
Ali A. K. Al-Jibori1 ◽  
Subhi A. M. Al-Jibori1 ◽  
Ahmed S. M. Al-Janabi2
Keyword(s):  
Nitrogen Atom ◽  
Palladium Complex ◽  
Platinum Complexes ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
High Yield ◽  
Conductivity Measurements ◽  
Endocyclic Nitrogen Atom ◽  
Square Planar ◽  
Square Planar Complexes

Six palladium (II) and platinum (II) mixed ligand complexes of metronidazole (mnz) and saccharinate (sac) or benzothiazolinolate (bit) complexes of the type [ML2(mnz)2], M = Pd or Pt, L = sac or bit, have been prepared in moderate to high yield. The newly prepared complexes have been characterized by elemental (C,H,N,S) analysis, conductivity measurements, infrared and 1H-NMR spectra. Characterization data showed that the mnz ligand in all of the prepared complexes is coordinated to metal center through the imidazole nitrogen atom. The (sac) anion ligand is coordinated through the endocyclic nitrogen atom, while the (bit) anion ligand is coordinated through the nitrogen atom in the palladium complex and through the oxygen atom of the carbonyl group in the platinum complexes. The geometry of the Pd (II) and Pt (II) complexes is square planar complexes.   http://dx.doi.org/10.25130/tjps.24.2019.105

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.

Reversible displacement of dihydrogen by carbon monoxide in binuclear platinum complexes. Characterization of binuclear carbonyl complexes of platinum(I)

1982 ◽  
Vol 1 (11) ◽  
pp. 1421-1429 ◽  
Author(s):  
John R. Fisher ◽  
Allan J. Mills ◽  
Steven Sumner ◽  
Michael P. Brown ◽  
Mary A. Thomson ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Platinum Complexes ◽  
Carbonyl Complexes

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.

Extended X-ray absorption fine structure and multiple-scattering simulation of nickel dithiolene complexes Ni[S2C2(CF3)2]2n(n= −2, −1, 0) and an olefin adduct Ni[S2C2(CF3)2]2(1-hexene)

2015 ◽  
Vol 22 (1) ◽  
pp. 124-129 ◽  
Author(s):  
Weiwei Gu ◽  
Hongxin Wang ◽  
Kun Wang
Keyword(s):  
Fine Structure ◽  
Multiple Scattering ◽  
Edge Structure ◽  
X Ray ◽  
Absorption Fine ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Uv Visible ◽  
Edge Features ◽  
X Ray Absorption

A series of Ni dithiolene complexes Ni[S2C2(CF3)]2n(n= −2, −1, 0) (1,2,3) and a 1-hexene adduct Ni[S2C2(CF3)2]2(C6H12) (4) have been examined by NiK-edge X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine-structure (EXAFS) spectroscopies. Ni XANES for1–3reveals clear pre-edge features and approximately +0.7 eV shift in the NiK-edge position for `one-electron' oxidation. EXAFS simulation shows that the Ni—S bond distances for1,2and3(2.11–2.16 Å) are within the typical values for square planar complexes and decrease by ∼0.022 Å for each `one-electron' oxidation. The changes in NiK-edge energy positions and Ni—S distances are consistent with the `non-innocent' character of the dithiolene ligand. The Ni—C interactions at ∼3.0 Å are analyzed and the multiple-scattering parameters are also determined, leading to a better simulation for the overall EXAFS spectra. The 1-hexene adduct4presents no pre-edge feature, and its NiK-edge position shifts by −0.8 eV in comparison with its starting dithiolene complex3. Consistently, EXAFS also showed that the Ni—S distances in4elongate by ∼0.046 Å in comparison with3. The evidence confirms that the neutral complex is `reduced' upon addition of olefin, presumably by olefin donating the π-electron density to the LUMO of3as suggested by UV/visible spectroscopy in the literature.

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