681. Studies in co-ordination chemistry. Part XIII. Magnetic moments and bond types of transition-metal complexes

1952 ◽  
pp. 3570 ◽  
Author(s):  
F. H. Burstall ◽  
R. S. Nyholm
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Magnetic Moments

scholarly journals Transition metal complexes of 5-bromosalicylidene-4-amino-3-mercapto-1,2,4-triazine-5-one: Synthesis, characterization, catalytic and antibacterial studies

2011 ◽  
Vol 76 (1) ◽  
pp. 75-83 ◽  
Author(s):  
A.S. Ramasubramanian ◽  
Ramachandra Bhat ◽  
Ramakrishna Dileep ◽  
Sandya Rani
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Pathogenic Bacteria ◽  
Magnetic Moments ◽  
Spectroscopic Techniques ◽  
Antibacterial Studies ◽  
Metal Precursors ◽  
Square Planar ◽  
Bactericidal Properties

Transition metal complexes of 5-bromosalicylidene-4-amino-3- mercapto-1,2,4-triazine-5-one with metal precursors, such as Cu(II), Ni(II), Co(II) and Pd(II), were synthesized and characterized by physicochemical and spectroscopic techniques. All the complexes are of the ML type. Based on analytical, spectral data and magnetic moments, the Co(II) and Ni(II) complexes were assigned octahedral geometries, while the Cu (II) and Pd(II) complexes square planar. A study on the catalytic oxidation of benzyl alcohol, cyclohexanol, cinnamyl alcohol, 2-propanol and 2- methyl-1-propanol was performed with N-methylmorpholine-N-oxide (NMO) and molecular oxygen as co-oxidants. All the complexes and their parent organic moiety were screened for their biological activity on several pathogenic bacteria and were found to possess appreciable bactericidal properties.

scholarly journals Synthesis, Characterization and Biological Evaluation of Schiff Base Transition Metal Complexes Derived from 4-Nitrobenzene-1,2-diamine and 5-Chloroisatin

2020 ◽  
Vol 32 (9) ◽  
pp. 2324-2328
Author(s):  
NETRA PAL SINGH ◽  
KAUSHAL KUMAR ◽  
GAJENDRA KUMAR ◽  
ANUROOP KUMAR
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Magnetic Moments ◽  
Biological Evaluation ◽  
Molar Conductance ◽  
Spectral Studies ◽  
Mass Spectral ◽  
Bacteria And Fungi

A series of transition metal complexes of the type [MLX2], where M = Mn(II), Fe(II), Co(II), Ni(II), X = Cl–/CH3COO– and L = Schiff base derived from 4-nitrobenzene-1,2-diamine and 5-chloroisatin have been synthesized and characterized by elemental analysis, molar conductance, IR, UV-visible, magnetic moments measurement, 1H & 13C NMR and mass spectral studies. On the basis of physico-chemical studies and spectral evaluation, an octahedral geometry have been proposed for all metal(II) complexes. The antimicrobial activity of ligand and its metal complexes have been additionally screened against bacteria and fungi. Metal(II) complexes show good activity as compared to ligand towards studied microorganisms and also metal complexes checked for their catalytic properties for benzoylation of phenol.

scholarly journals Synthesis, Characterizations and Antimicrobial Activity of Metal Complexes of 2-(2-Furanylmethylaminocarbonyl)benzoic Acid

2011 ◽  
Vol 8 (1) ◽  
pp. 443-448 ◽  
Author(s):  
R. H. Patel ◽  
B. L. Hiran
Keyword(s):  
Antimicrobial Activity ◽  
Antifungal Activity ◽  
Transition Metal ◽  
Benzoic Acid ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Magnetic Moments ◽  
Thermal Studies ◽  
Spectral Studies

The ligand, 2-(2-furanylmethylaminocarbonyl)benzoic acid (FMBA) and it’s transition metal complexes have been synthesized and characterized by elemental analysis, spectral studies, magnetic moments and thermal studies. The antifungal activity of all the samples was monitored against common fungi.

Transition metal complexes of thiabendazole

1971 ◽  
Vol 24 (7) ◽  
pp. 1369 ◽  
Author(s):  
C Kowala ◽  
KS Murray ◽  
JM Swan ◽  
BO West
Keyword(s):  
Electrical Conductivity ◽  
Transition Metal ◽  
Transition Metals ◽  
Metal Complexes ◽  
Organic Solvents ◽  
Transition Metal Complexes ◽  
Metal Ion ◽  
Magnetic Moments ◽  
Anthelmintic Activity ◽  
Metal Chlorides

Complexes of thiabendazole with transition metals (Co2+, Cu2+, Fe2+, Fe3+, Mn2+, Ni2+, and Zn2+) containing one, two, or three molecules of ligand per metal ion are described. Their spectra and magnetic moments are reported. In general, the complexes are insoluble or only slightly soluble in water or most organic solvents. Only complexes of metal chlorides are sufficiently soluble in methanol to show electrical conductivity. It is suggested that most of the insoluble complexes are of polymeric character. � The anthelmintic activity of all complexes is only slightly higher than that of thiabendazole.

Carboxylic Esters as Ligands. II. Transition metal complexes of Diethyl Acetonedicarboxylate, Ethyl Acetoacetate, and Diethyl oxaloacetate

1967 ◽  
Vol 20 (9) ◽  
pp. 1829 ◽  
Author(s):  
RW Hay ◽  
BP Caughley
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Schiff Bases ◽  
Transition Metal Complexes ◽  
Infrared Spectra ◽  
Ethyl Acetoacetate ◽  
Magnetic Moments ◽  
Magnetic Data ◽  
Keto Esters ◽  
Metal Metal

The preparation, infrared spectra, magnetic data, and reactions of a variety of transition metal complexes of diethyl acetonedicarboxylate are described. The infrared spectra indicate chelate ring formation with a metal-oxygen bond with the carbonyl group of the ester. Transesterification reactions with alcohols occur much less readily with these complexes than with the corresponding metal oxaloacetates. Bis(ethyl acetoacetato)copper(II) undergoes methanolysis rather than trans-esterification on refluxing with methanol to give a bright blue methoxy-bridged polymer with an abnormally low magnetic moment (μeff 1.14 B.M. at 17�), presumably indicating metal-metal interaction. The magnetic moments of various transition metal complexes of ethyl acetoacetate and diethyl oxaloacetate have also been determined. The β-keto esters have been condensed with 1,2-diaminoethane to give N,N?-bis Schiff bases which exist predominantly as the enamine tautomer in the solid state and in solution. Attempts to prepare copper(II) complexes of these Schiff bases in aqueous ethanol have been unsuccessful as the ligands rapidly hydrolyse in the presence of copper(II) ions.

Übergangsmetallkomplexe mit Aminosäuren und Dipeptiden / Transition Metal Complexes of Amino Acids and Dipeptides

1976 ◽  
Vol 31 (2) ◽  
pp. 198-202 ◽  
Author(s):  
Hans Guntner ◽  
Karl E. Schwarzhans
Keyword(s):  
Amino Acids ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Magnetic Moments ◽  
Epr Spectra

A series of transition metal complexes with the ligands L-Tyr, Gly-L-Tyr and Gly-L-Phe has been prepared. The magnetic moments, the IR and EPR spectra of the isolated compounds have been collected.

Transition Metal Complexes of 5-(Pyridin-2-yl)tetrazole and Methyl-Substituted 5-(Pyridin-2-yl)tetrazoles

1979 ◽  
Vol 32 (8) ◽  
pp. 1669 ◽  
Author(s):  
NS Gill ◽  
F Yang
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Magnetic Moments ◽  
Organic Ligands ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural Relationships ◽  
Visible Spectra ◽  
Diffraction Patterns

Transition metal complexes of the formulae M(ptt)2,2H2O (M = Mn, Fe, Co, Cu, Zn), M(ptt)2,- 2NH3,H2O (M = Co, Ni), FeCl(ptt),2H2O, Ag(ptt), Mn(tmptt)2,2H2O M(tmptt)2,NH3,2H2O (M = Cu, Zn)M(tmptt)2NH32H2O (M=Co, Ni), Ni(tmptt)2,2NH3,H2O, Ag(tmptt), M(smptt)2 (M = Co, Ni), Cu(smptt)2,3H2O, Cu(smptt)2,NH3,2H2O, Cu(smptt)2,2NH3, Zn(smptt)2,NH3,H2O and Ag(smptt) where ptt, tmptt and smptt are the anions of 5-(pyridin-2-yl)tetrazole, 5-(3-methylpyridin- 2-yl)tetrazole and 5-(6-methylpyridin-2 yl)tetrazole, respectively, have been prepared.Studies of the infrared and ultraviolet-visible spectra, magnetic moments and X-ray diffraction patterns show structural relationships between compounds and indicate that, in addition to the organic ligands, water and ammonia molecules are bonded to the metal ions. Thermal decomposition of the compounds proceeds through the formation of pyridinecarbonitriles.

Mechanochemical changes on cyclometalated Ir(iii) acyclic carbene complexes – design and tuning of luminescent mechanochromic transition metal complexes

2020 ◽  
Vol 7 (3) ◽  
pp. 786-794 ◽  
Author(s):  
Jingqi Han ◽  
Kin-Man Tang ◽  
Shun-Cheung Cheng ◽  
Chi-On Ng ◽  
Yuen-Kiu Chun ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Carbene Complexes ◽  
New Class

A new class of luminescent cyclometalated Ir(iii) complexes with readily tunable mechanochromic properties derived from the mechanically induced trans-to-cis isomerization have been developed.

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