Metal complexes of tridentate hybrid ligands. I. Cobalt and nickel conlplexes of ligands containing the donor sequence As-N-O

1969 ◽  
Vol 22 (11) ◽  
pp. 2315 ◽  
Author(s):  
B Chiswell ◽  
KW Lee
Keyword(s):  
Metal Complexes ◽  
Electronic Spectra ◽  
Weak Field ◽  
Magnetic Data ◽  
Conductivity Measurements ◽  
Hybrid Ligands ◽  
Cobalt And Nickel

The interaction of the new tridentate ?hybrid? ligand, N-o- dimethylarsino-phenylsalicylaldimine (As-N-O), with cobalt(II) salts leads to the formation of cationic octahedral cobalt(III) complexes of the type [Co(As-N-O)2]+. No cobalt(II) complex entities containing the ligand could be isolated. With nickel(II) salts three types of octahedral complexes were obtained: (a) [Ni(As-N-O)2],H2O, (b) Ni(As-N- O)X,-xH2O (X = Cl, Br, or NCS), (c) [Ni2(As-N-O)3ClO4]. Electronic spectra, conductivity measurements, and magnetic data have been used to determine the structure of the complexes isolated. The ?hybrid? ligand appears to operate overall as a relatively weak field ligand.

scholarly journals Spectroscopic studies of benzoxazole-2-thione complexes. Derivatives of cobalt(II) and nickel(II) halides

1976 ◽  
Vol 54 (1) ◽  
pp. 85-90 ◽  
Author(s):  
Carlo Preti ◽  
Giuseppe Tosi
Keyword(s):  
Magnetic Susceptibility ◽  
Ir Spectra ◽  
Electronic Spectra ◽  
Spectroscopic Studies ◽  
Ligand Field ◽  
Conductivity Measurements ◽  
Derivatives Of ◽  
Ligand Field Parameters ◽  
Cobalt And Nickel

The preparation of some complexes of benzoxazole-2-thione with halides of cobalt(II) and nickel(II) is reported. The complexes of cobalt(II) and nickel(II) are tetrahedral of the type ML2X2 with the exception of NiLBr2. The complexes have been studied by means of magnetic susceptibility measurements, infrared and far ir spectra, electronic spectra, and conductivity measurements. The ligand behaves as monodentate N-bonded. The various ligand field parameters, Dq, B′, and β show about 60 and 80% of covalency in the cobalt(II) and nickel(II) complexes respectively and suggest a medium strong ligand field. The spectroscopy parameters of cobalt and nickel derivatives confirm the presence of CoN2X2 and NiN2X2 chromophores.

Metal complexes of 1,10-Phenanthroline derivatives. IV. Complexes of 1,10-Phenanthroline-2-carboxamide

1972 ◽  
Vol 25 (1) ◽  
pp. 37 ◽  
Author(s):  
HA Goodwin ◽  
FE Smith
Keyword(s):  
Oxygen Atom ◽  
Metal Complexes ◽  
High Spin ◽  
Chelating Agent ◽  
Weak Field ◽  
Amide Group ◽  
Magnetic Data ◽  
Iron Cobalt ◽  
Cobalt Nickel ◽  
Bivalent Iron

Complexes of the tridentate chelating agent 1,l0-phenanthroline-2- carboxamide, with bivalent iron, cobalt, nickel, and copper are described. Bis-ligand, six-coordinate complexes were obtained with all metals. A series of mono-ligand complexes, which are also believed to be six-coordinate, was also obtained. Infrared evidence indicates that the amide group is bound through the oxygen atom. Electronic spectral and magnetic data indicate that the ligand produces a relatively weak field and the iron complexes are high-spin. The tris-ligand iron(11) complex of pyridine-2-carboxamide is also described. This too is high-spin, although the bidentate amide apparently produces a slightly stronger field than the tridentate.

scholarly journals Synthesis, Biological, Spectral, and Thermal Investigations of Cobalt(II) and Nickel(II) Complexes of N-Isonicotinamido-2′,4′-Dichlorobenzalaldimine

2006 ◽  
Vol 2006 ◽  
pp. 1-9 ◽  
Author(s):  
Ram K. Agarwal ◽  
Deepak Sharma ◽  
Lakshman Singh ◽  
Himanshu Agarwal
Keyword(s):  
Magnetic Susceptibility ◽  
Metal Complexes ◽  
Electronic Spectra ◽  
Pathogenic Fungi ◽  
Antibacterial Activities ◽  
Octahedral Geometry ◽  
Conductivity Measurements ◽  
Thermal Investigations ◽  
Elemental Analyses

A new series of 12 complexes of cobalt(II) and nickel(II) with N-isonicotinamido-2′,4′-dichlorobenzalaldimine (INH-DCB) with the general composition MX2⋅n(INH-DCB) [M = Co(II) or Ni(II), X = Cl−, Br−,NO3−, NCS−, or CH3COO−, n = 2; X = ClO4−, n = 3] have been synthesized. The nature of bonding and the stereochemistry of the complexes have been deduced from elemental analyses, infrared, electronic spectra, magnetic susceptibility, and conductivity measurements. An octahedral geometry has been suggested for all the complexes. The metal complexes were screened for their antifungal and antibacterial activities on different species of pathogenic fungi and bacteria and their biopotency has been discussed.

scholarly journals Terpyridine–tetrathiafulvalene hybrid ligands and their electroactive metal complexes

2013 ◽  
Vol 37 (5) ◽  
pp. 1427 ◽  
Author(s):  
Esmah Belhadj ◽  
Abdelkrim El-Ghayoury ◽  
Emilie Ripaud ◽  
Leokadiya Zorina ◽  
Magali Allain ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Hybrid Ligands

scholarly journals Di(μ-phosphido)cobalt-und -nickel-Verbindungen mit Trimethylphosphanliganden/ Di(μ-phosphido)cobalt and Nickel Compounds with Trimethylphosphine Ligands

1988 ◽  
Vol 43 (8) ◽  
pp. 927-932 ◽  
Author(s):  
Hans-Friedrich Klein ◽  
Michael Gaß ◽  
Ulf Zucha ◽  
Brigitte Eisenmann
Keyword(s):  
Metal Complexes ◽  
High Yield ◽  
Symmetric Products ◽  
Space Group ◽  
Mixed Metal ◽  
Nickel Compounds ◽  
Mixed Metal Complexes ◽  
Cobalt And Nickel

AbstractSeveral fortuitous preparations and high yield rational syntheses for [(Me3P)2M(PMe2)]: (1: M = Co; 2: M = Ni) are described. 1 crystallizes in the space group P1̄ (no. 2); a = 975.6(5). b = 943.6(5), c - 904.2(5) pm. α= 63.8(1)°, β = 79.1(1)°, γ = 72.8(1)°. Mixed metal complexes L2Co(PR2)2NiL2 (L = PMe3; R = Me, Ph) evaded detection giving symmetric products exclusively. An improved synthesis of LiP(C6H5)2·dioxane is also described.

Sign in / Sign up

Export Citation Format

Share Document