scholarly journals Synthesis, Spectroscopic and Electrochemical Studies of Mononuclear Fe(II) and Ni(II) Complexes Containing a Macrocyclic Ligand Derived from Pyridine-2,6-dicarboxaldehyde and 1,2-Bis(2-aminoethoxy) Ethane

2011 ◽  
Vol 3 (3) ◽  
pp. 599-607 ◽  
Author(s):  
M. M. Alam ◽  
R. Begum ◽  
S. M. M. Rahman ◽  
S. M. S. Islam
Keyword(s):  
Schiff Base ◽  
Macrocyclic Ligand ◽  
Nickel Complexes ◽  
Spectroscopic Studies ◽  
Octahedral Geometry ◽  
Electrochemical Studies ◽  
Metal Source ◽  
Elemental Analyses ◽  
Uv Visible ◽  
Metal Perchlorate

The cyclic (2+2) template condensation of 2,6-pyridinedicarboxaldehyde with 1,2-bis(2-aminoethoxy) ethane using Pb(SCN)2 as the metal source gave dinuclear lead(II) complex, Pb2L1(SCN)4 (1), where L1 is tetra-Schiff-base macrocycle. The transmetallation treatment of 1 with suitable metal perchlorate yield [FeL1](ClO4)2 (2) and [NiL1](ClO4)2 (3). The complexes (2 & 3) have been characterized by elemental analyses, IR, UV-visible, and ESI-MS spectroscopy. Based on spectral data, octahedral geometry may be proposed for these complexes. The electrochemical behavior of iron and nickel complexes is reported.Keywords:  Macrocyclic complexes; Spectroscopic studies; 1,2-Bis(2-aminoethoxy) ethane; Charge transfer.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: 10.3329/jsr.v3i3.7231               J. Sci. Res. 3 (3), 609-617 (2011)

Azaoxa Macrocyclic and Acyclic Complexesof Lanthanides

1998 ◽  
Vol 63 (3) ◽  
pp. 363-370 ◽  
Author(s):  
Violetta Patroniak-Krzyminiewska ◽  
Wanda Radecka-Paryzek
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
Macrocyclic Ligand ◽  
Lanthanide Ions ◽  
H Nmr ◽  
Elemental Analyses ◽  
Acyclic Complexes ◽  
Schiff Base Cyclocondensation

The template reactions of 2,6-diacetylpyridine with 3,6-dioxaoctane-1,8-diamine in the presence of dysprosium(III), thulium(III) and lutetium(III) chlorides and erbium(III) perchlorate produce the complexes of 15-membered macrocyclic ligand with an N3O2 set of donor atoms as a result of the [1+1] Schiff base cyclocondensation. In contrast, analogous reactions involving the lighter lanthanide ions (lanthanum(III), samarium(III) and europium(III)) yield the acyclic complexes with terminal acetylpyridyl groupings as products of the partial [2+1] condensation. The complexes were characterized by spectral data (IR, UV-VIS, 1H NMR, MS), and thermogravimetric and elemental analyses.

scholarly journals Synthesis and spectral studies of Cu(II), Ni(II), Co(II), Mn(II), Zn(II) and Cd(II) complexes of a new macroacyclic ligand n,n’-bis(2-benzothiazolyl)-2,6-pyridinedicarboxamide

2006 ◽  
Vol 71 (5) ◽  
pp. 529-542 ◽  
Author(s):  
Kalagouda Gudasi ◽  
Siddappa Patil ◽  
Ramesh Vadavi ◽  
Rashmi Shenoy ◽  
Manjula Patil
Keyword(s):  
Liquid Nitrogen ◽  
Magnetic Moments ◽  
Thermal Studies ◽  
Liquid Nitrogen Temperature ◽  
Octahedral Geometry ◽  
Spectral Studies ◽  
Conductance Data ◽  
X Band ◽  
Elemental Analyses ◽  
Uv Visible

A new macroacyclic amide ligand N,N?-bis(2-benzothiazolyl)-2,6-pyridinedicarboxamide (BPD), formed by the condensation of 2,6-pyridinedicarbonyldichloride with 2-aminobenzothiazole and its Cu(II), Ni(II), Co(II), Mn(II), Zn(II) and Cd(II) complexes were synthesized. Their structures were elucidated on the basis of elemental analyses, conductance measurements, magnetic moments, spectral (IR, NMR UV-Visible, EPR and FAB) and thermal studies. The complexes exhibit an octahedral geometry around the metal center. Conductance data of the complexes suggested them to be 1:1 electrolytes. The pentadentate behavior of the ligand was proposed on the basis of spectral studies. The X-band EPR spectra of the Cu(II) and Mn(II) complexes in the polycrystalline state at room (300 K) and liquid nitrogen temperature (77 K) were recorded and their salient features are reported.

scholarly journals Biological Active Cobalt(II) and Nickel(II) Complexes of 12-Membered Hexaaza [N6] Macrocyclic Ligand Synthetic and Spectroscopic Aspects

2010 ◽  
Vol 7 (4) ◽  
pp. 1238-1245 ◽  
Author(s):  
Umendra Kumar ◽  
Sulekh Chandra
Keyword(s):  
Thermal Analysis ◽  
Magnetic Susceptibility ◽  
Metal Ion ◽  
Macrocyclic Ligand ◽  
Pathogenic Fungi ◽  
Spectroscopic Studies ◽  
Molar Conductance ◽  
Octahedral Geometry ◽  
Conductivity Measurements ◽  
Macrocyclic Schiff Base

New cobalt(II) and nickel(II) complexes of 12-membered macrocyclic Schiff - base ligand containing thiosemicarbazone moiety as a part of ring have been prepared having general composition [MLX2] where M = Co(II) or Ni(II), L=3,4,9,10–tetra-2-furanyl-1,2,5,6,8,11- hexaazacyclododeca-7,12- dithione - 2,4,8,10 – tetraene, X = Cl-, NO3-, NCS-. The complexes have been characterized by elemental analysis, molar conductance, magnetic susceptibility measurements, spectral (IR, electronic, EPR) techniques and thermal analysis. Spectroscopic studies suggested a six coordinated octahedral geometry for all the complexes. The IR spectra of complexes suggest that ligand is coordinated to the metal ion through its four imines nitrogen. Conductivity measurements supported the non electrolytic nature of the complexes. The antifungal activities of complexes have been studied against a number of pathogenic fungi under laboratory conditions. The complexes showed good antifungal results. Thermal analysis of reported complexes suggests the absence of water molecule either in or outside the coordination sphere.

Chelates of nickel(II) and copper(II) with tridentate Schiff base formed by the condensation of S-benzyldithiocarbazate with benzoin

1978 ◽  
Vol 56 (15) ◽  
pp. 2000-2002 ◽  
Author(s):  
M. T. H. Tarafder ◽  
M. Akbar Ali
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
General Formula ◽  
Schiff Base Ligand ◽  
Nickel Complexes ◽  
Planar Structure ◽  
Spectral Studies ◽  
Square Planar ◽  
Elemental Analyses ◽  
Tridentate Schiff Base

New complexes with the Schiff base ligand derived from S-benzyldithiocarbazate (NH2—NH—CSSCH2C6H5) have been prepared and characterized by elemental analyses, magnetic, conductometric, ir, and electronic spectral studies. The tridentate ONS Schiff base S-benzyl-β-N-(phenyl, phenylhydroxymethyl)methylenedithiocarbazate gave mono-ligand complexes with Ni(II) and Cu(II) having the general formula [MligandX] (M = Ni(II) and Cu(II); X = NO3, Cl, Br, NCS). A proposed square-planar structure for the nickel complexes is supported by magnetic and spectral data. A square-planar structure is also suggested for Cu(II) complexes. The ir results give evidence of the different bondings present in the complexes.

scholarly journals Molybdenum(VI) Complexes with Schiff Base Containing N-Hetero Atom

2020 ◽  
Vol 10 (1) ◽  
pp. 1816-1824
Keyword(s):  
Schiff Base ◽  
Octahedral Geometry ◽  
Molar Conductivity ◽  
Spectral Studies ◽  
Distorted Octahedral Geometry ◽  
Tetradentate Ligand ◽  
Molybdenum Complex ◽  
Molybdenum Complexes ◽  
Distorted Octahedral ◽  
Elemental Analyses

Parent dioxomolybdenum(VI) complex formation by the reaction of MoO2(acac)2 with Schiff base tetradentate ligand, described in this paper. Schiff base tetradentate ligand [H2NCH2CH2 N=CC4H3S-CC4H3S=NCH2CH2NH2] obtained from the condensation of di-2-thienylethanedione with 1,2-diaminoethane. Macrocyclic molybdenum complexes were obtained from the cyclization of a synthesized complex with different 1,3 – diketones. The general formula of parent molybdenum complex is given as [MoO2( H2NCH2CH2 N=CC4H3S – CC4H3S=N CH2CH2NH2)](acac)2 and for macrocyclic molybdenum complex is [MoO2{(CH2CH2 N=CC4H3S – CC4H3S=N CH2CH2) N=C(R)CH2C(R’)=N}](acac)2. Ligand and all molybdenum complexes were characterized by elemental analyses(EA), molar conductivity(ΛM), ultraviolet(UV-Vis), and infrared (IR) spectral studies. The distorted octahedral geometry of element Mo in the parent as well as in macrocyclic molybdenum complexes is completed by two oxo O-atoms, four N-atoms from derived Schiff ligand.

scholarly journals Theoretical and Spectroscopic Studies of SN Donor Thiosemicarbazone Ligand and Its Pt(II) Complex

2021 ◽  
Vol 20 (1) ◽  
pp. 113-117
Author(s):  
Amna Qasem Ali ◽  
Boubaker Hosouna ◽  
Khadija Abdusslam Ahmida ◽  
Abdulasalam Amhamed Mohamed Alshreef
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Spectroscopic Studies ◽  
Azomethine Nitrogen ◽  
Nmr Analysis ◽  
Thiosemicarbazone Ligand ◽  
Elemental Analyses ◽  
Ft Ir ◽  
Theoretical Results ◽  
Good Agreement

Sulphur-nitrogen(SN) donor thiosemicarbazone ligand [(Z)-N-ethyl-2-(5-methyl-2-oxoindolin-3-ylidene)hydrazinecarbothioamide] and its Pt(II) complex were synthesized by condensation method. The compounds were structurally characterized by elemental analysis CHNS, FT-IR, and NMR analysis. The elemental analyses data for the compounds were in good agreement with the theoretical values.  The melting point of the complex was higher than the ligand, as expected. The FT-IR spectral data reflect a bidentate bonding of thiosemicarbazone ligand to Pt(II) ion through thioketo sulfur and azomethine nitrogen. The docking results (theoretical results) of these compounds show that the binding energy between DNA and Pt(II) complex was found to be less than that of the Schiff base ligand (L) in the sense that it has higher stability at various stages and angles. The strength of docking between DNA and Pt(II) complex was also found to be that stronger than the Schiff base ligand (L).

Antiproliferative, antioxidant, computational and electrochemical studies of new azo-containing Schiff base ruthenium(ii) complexes

2018 ◽  
Vol 42 (4) ◽  
pp. 2952-2963 ◽  
Author(s):  
Ayşe İnan ◽  
Mesut İkiz ◽  
Seçil Erden Tayhan ◽  
Sema Bilgin ◽  
Nusret Genç ◽  
...  
Keyword(s):  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Electrochemical Studies ◽  
Uv Visible ◽  
C Nmr

A new series of ruthenium(ii) complexes 7–11 containing the –NN– group are synthesized and characterized via elemental analysis, and IR, UV-visible and 1H–13C NMR spectroscopy.

scholarly journals Structural and Surface Characterization of Newly Synthesized D-π-D Type Schiff Base Ligand: (1E,2E)-3-[4-(Dimethylamino)phenyl]prop-2-en-1-ylidene)phenylamine

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Gulsah Gumrukcu ◽  
Serkis Garikyan ◽  
Gulnur Keser Karaoglan ◽  
Dolunay Sakar
Keyword(s):  
Schiff Base ◽  
Surface Properties ◽  
Schiff Base Ligand ◽  
Mass Spectra ◽  
Surface Characterization ◽  
Acid Base ◽  
H Nmr ◽  
Elemental Analyses ◽  
Uv Visible

A new Schiff base with D-π-D type, (1E,2E)-3-[4-(dimethylamino)phenyl]prop-2-en-1-ylidene)phenylamine, has been successfully synthesized using the reaction of (2E)-3-[4-(dimethylamino)phenyl]acrylaldehyde with aniline. The Schiff base ligand has been characterized by FTIR, UV-visible, and1H NMR as well as TG/DTA, SEM, BET, and elemental analyses and mass spectra. Surface properties and acid-base constants of Schiff base ligand were determined by IGC measurements.

Sign in / Sign up

Export Citation Format

Share Document