scholarly journals Synthesis characterization of Cr(III), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes of 2,12-dimethyl-3-13-di-n-propyl-l,4,ll,14-tetraazacycloeicosa-1,13,l1,13-tetraene

2002 ◽  
Vol 67 (12) ◽  
pp. 825-832 ◽  
Author(s):  
Raghu Prasad ◽  
Mala Mathur
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Electronic Spectra ◽  
Magnetic Measurements ◽  
Elemental Analyses

Metal complexes of a 20-membered tetraazamacrocycle 2,12-dimethyl-3,13-di-n-propyl 1,4,11,14-tetraazacycloeicosa-1,3,11,13-tetraene(L) of the type [MLX2]X(M=Cr(III), Fe(III); X=NO3)[CoLNO3]NO3, [NiL(NO3)2], [CuL]Cl2 and [ZnLCl2]have been prepared by 2+2 cyclocondensation of 2,3-hexanedione with 1,6-diaminohexane in the presence of metal ions as templates. These complexes were characterized by elemental analyses, conductances, IR and electronic spectra and magnetic measurements.

scholarly journals Synthesis and Characterization of a NewN"-[(1Z,2E)-2- (Hydroxyimino)-1-phenylpropylidene]-N"'-[(1E)-phenylmethylene]thiocarbonohydrazide and its Complexes with Co(II), Ni(II) and Cu(II)

2010 ◽  
Vol 7 (2) ◽  
pp. 409-418
Author(s):  
Dilip C. Sawant ◽  
A. Venkatchallam ◽  
R. G. Deshmukh
Keyword(s):  
Electrical Conductivity ◽  
Metal Ions ◽  
Metal Complexes ◽  
Magnetic Measurements ◽  
Divalent Metal ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
Divalent Metal Ions ◽  
First Time

Synthesis and characterization of a newN"-[(1Z,2E)-2- (Hydroxyimino)-1-phenylpropylidene]-N"'-[(1E)-phenylmethylene]thiocarbonohydrazide and its metal complexes with Co(II), Ni(II) and Cu(II) metal ions. The ligand synthesis and characterization is reported for first time. The complexes of divalent metal ions were synthesized in 1:2 molar proportion using ethanol as solvent. The ligands as well as its metal complexes were characterized using various physicochemical techniques such as elemental analysis, spectral and magnetic measurements and electrical conductivity measurements in case of the metal complexes only. The data for the metal complexes reveals that they may be represented by ML2. The metal complexes show interesting features of coordination structure.

scholarly journals Transition metal complexes with thiosemicarbazide-based ligands. Part 60. Reactions of copper(II) bromide with pyridoxal S-methylisothiosemicarbazone (PLITSC). Crystal structure of [Cu(PLITSC−H)H2O]Br•H2O

2014 ◽  
Vol 79 (3) ◽  
pp. 291-302 ◽  
Author(s):  
Vukadin Leovac ◽  
Ljiljana Vojinovic-Jesic ◽  
Sonja Ivkovic ◽  
Marko Rodic ◽  
Ljiljana Jovanovic ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Structural Characterization ◽  
Electronic Spectra ◽  
Square Planar

The synthesis and structural characterization of a square-planar copper(II) complex with pyridoxal S-methylisothiosemicarbazone (PLITSC) of the formula [Cu(PLITSC?H)H2O]Br?H2O (1) as the first Cu(II) complex with monoanionic form of this ligand were described. Complex 1 together with two previously synthesized complexes [Cu(PLITSC)Br2] (2) and [Cu(PLITSC)Br(MeOH)]Br (3) were characterized by elemental analysis, IR and electronic spectra and also by the methods of thermal analysis, conductometry and magnetochemistry.

New phthalocyanines containing bulky electron rich substituents

2009 ◽  
Vol 13 (06) ◽  
pp. 753-759 ◽  
Author(s):  
İbrahim Özçeşmeci ◽  
Orhan Güney ◽  
Ali İhsan Okur ◽  
Ahmet Gül
Keyword(s):  
Energy Transfer ◽  
Metal Ions ◽  
Spectral Data ◽  
Electronic Spectra ◽  
Fluorescence Spectra ◽  
Radiative Decays ◽  
Metal Free ◽  
H Nmr ◽  
Elemental Analyses ◽  
New Compounds

Metal-free and metallophthalocyanines with four 9-anthroyl groups bound through ethylthio ester bridges on the periphery have been prepared. The new compounds were characterized by elemental analyses, 1 H NMR, IR, mass and UV-vis spectral data. The electronic spectra exhibit an intense π-π* transition of 9-anthroyl identity together with characteristic Q and B bands of the phthalocyanine core. Effect of metal ions on intensity of fluorescence spectra of phthalocyanine derivatives substituted with 9-anthroyl groups was investigated. The energy transfer to the phthalocyanine core and radiative decays of the 9-anthroyl emission and phthalocyanine core were examined.

scholarly journals Penta-Coordinated Complexes of Bis(2,4-pentanedionato) Copper(II) with Some Oxygen Donor Organic Solvents

1981 ◽  
Vol 36 (1) ◽  
pp. 42-44 ◽  
Author(s):  
B. P. Baranwal ◽  
G. K. Parashar ◽  
R. C. Mehrotra
Keyword(s):  
Molecular Weight ◽  
General Formula ◽  
Organic Solvents ◽  
Electronic Spectra ◽  
Magnetic Measurements ◽  
Oxygen Donor ◽  
Elemental Analyses ◽  
Form Addition

Bis(2,4-pentanedionato) Copper(II) reacts with some oxygen donor organic solvents to form addition complexes with general formula, Cu(2,4-pentanedionato)2. L (where L = MeOH, EtOH, PriOH, ButOH, THF, MeCOMe, MeCOEt and MeCOPrn). The complexes were recrystallized and characterized by the elemental analyses, infrared and electronic spectra, molecular weight and magnetic measurements.

scholarly journals Synthesis and Characterization of Some Group 12 Metal Complexes with Tellurium Containing 10-Membered Tetraazamacrocyclic Ligands

2011 ◽  
Vol 8 (3) ◽  
pp. 1158-1163
Author(s):  
Nitu ◽  
K. K. Verma
Keyword(s):  
Metal Complexes ◽  
Spectral Studies ◽  
Conductivity Measurements ◽  
Metal Chlorides ◽  
Group 12 ◽  
Elemental Analyses ◽  
Physicochemical Studies ◽  
Tetraazamacrocyclic Ligands ◽  
Pmr Spectra

A new series of 10-membered tellurium containing tetraazamacrocyclic complexes, [ML1Cl2], [ML2Cl2] and [ML3Cl2], where [M=Zn(II), Cd(II), Hg(II); L1, L2and L3=10-membered tellurium containing tetraazamacrocyclic ligands] have been prepared via the template condensation of ethylenediamine and diaryltellurium dichlorides, R2TeCl2, (R=p-hydroxyphenyl, 3-methyl-4-hydroxyphenyl,p-methoxyphenyl) in the presence of metal chlorides. These complexes have been characterized by elemental analyses, conductivity measurements, infrared, electronic absorption and proton magnetic resonance spectral studies. IR and PMR spectra confirm the formation of 10-membered tetraazamacrocycle skeleton and their tetradentate nature. An octahedral geometry has been assigned to all the metal complexes on the basis of various physicochemical studies.

scholarly journals Preparation and Characterization of Di-, Tri-, and Tetranuclear Schiff Base Complexes Derived from Diamines and 3,4-Dihydroxybenzaldehyde

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Ahlam Jameel Abdulghani ◽  
Asmaa Mohammed Noori Khaleel
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Copper Complex ◽  
Condensation Reaction ◽  
Magnetic Moments ◽  
Thermal Analyses ◽  
Schiff Base Complexes ◽  
Conductivity Measurements ◽  
Elemental Analyses

A series of new di-, tri-, and tetranuclear Co(II) and Cu(II) complexes of three new diSchiff base ligands were synthesized by two different methods. The first method involved the synthesis of the three ligands from condensation reaction of 3,4-dihydroxybenzaldehyde (L′H2) with ethylenediamine (en), o-phenylenediamine (o-PD), or 4,5-dimethyl-1,2-phenylendiamine (DMPD) in a mole ratio of 2 : 1 followed by the reaction of the resulting Schiff bases ligands with Cu(II) or Co(II) ions in the presence of 2,2′-bipyridyl (L) to form the di- and trinuclear metal complexes. The second method involved the condensation of the copper complexLCu(II)L′(L = 2,2′-bipyridyl, L′ = 4-formylbenzene-1,2-bis(olate)) with en, o-PD, or DMPD in a mole ratio of 2 : 1, respectively, followed by reaction with CuCl2or Cu(ClO4)2to form di-, tri-, and tetranuclear copper (II) complexes, respectively. The structures of the ligands and metal complexes were characterized by elemental analyses, NMR, and FTIR spectra. The geometries of metal complexes were suggested according to elemental analysis, electronic spectra, thermal analyses, atomic absorption, and magnetic moments and conductivity measurements.

scholarly journals Synthesis, Physical Characterization of M(III) Transition Metal Complexes Derived from Thiodihydrazide and 5-tert-Butyl-2-hydroxy-3-(3-phenylpent-3-yl) Benzaldehyde

2012 ◽  
Vol 9 (4) ◽  
pp. 2119-2127 ◽  
Author(s):  
Gajendra Kumar ◽  
Rajeev Johari ◽  
Shoma Devi
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Schiff Base Ligand ◽  
Metal Ion ◽  
Magnetic Measurements ◽  
Metal Salt ◽  
Magnetic Moments ◽  
Metal Centers ◽  
H Nmr

A Schiff base ligand was synthesized by reacting 5-tert-butl-2-hydroxy-3-(3-phenylpent-3-yl) benzaldehyde and thiodihydrazide (2:1) and a series of metal complexes with this new ligand were synthesized by reaction with Cr (III), Mn (III), and Fe (III) metal salt in methanolic medium. The Schiff base ligand and its complexes have been characterized with the help of elemental analysis, conductance measurements, magnetic measurements and their structure configuration have been determined by various spectroscopic (electronic, IR,1H NMR,13C NMR, GCMS) techniques. Electronic and magnetic moments of the complexes indicate that the geometries of the metal centers were octahedral. IR spectral data suggest that ligand behaves as a tetradentate ligand with ONNO donor sequence towards the metal ion.

scholarly journals Synthesis and characterization of novel four heterodimetallic mixed metal complexes of 2,6-pyridinedicarboxylic acid

2020 ◽  
Vol 34 (2) ◽  
pp. 313-321
Author(s):  
H. İlkimen ◽  
R. S. Canlıdinç
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Magnetic Measurement ◽  
Thermal Analyses ◽  
Mixed Metal ◽  
Carboxylate Oxygen ◽  
Pyridinedicarboxylic Acid ◽  
Metal Metal ◽  
Mixed Metal Complexes

Four novel hetero dimetallic mixed metal complexes of 2,6-pyridinedicarboxylic acid       (H2dipic), [Ni(H2O)5Co(dipic)2] (1), [Co(H2O)5Co(dipic)2][Ni(H2O)5Ni(dipic)2][Co(dipic)(H2O)3] (2), [Cu(H2O)5Ni(dipic)2]2[Co(dipic)(H2O)] (3) and [Ni(H2O)5Cu(dipic)2]2[Co(dipic)(H2O)] (4) have been prepared and characterized by elemental, AAS, spectral (IR and UV-Vis), and thermal analyses, as well as by using magnetic measurement and molar conductivity techniques. The results indicate that metal ions coordinate with 2,6-pyridinedicarboxylate ions (dipic2-) nitrogen atoms and carboxylate oxygen atoms of ligands. The mole ratio of dipic2- and metal ions in the complexes have been determined to be 2:2 (Co, Ni) for 1, 5:5 (3Co, 2Ni) for 2, 5:5 (Co, 2Ni and 2Cu) for 3 and 5:5 (Co, 2Ni and 2Cu) for 4 according to the results of elemental analysis. The structures of 1-4 might be proposed as octahedral ([Cu(dipic)(H2O)] unit for 2 square plane) according to results of spectroscopic analysis. The TG and DTA properties of compounds have been studied.                     KEY WORDS: 2,6-Pyridinedicarboxylic acid, Mixed metal, Metal complex   Bull. Chem. Soc. Ethiop. 2020, 34(2), 313-321 DOI: https://dx.doi.org/10.4314/bcse.v34i2.9

scholarly journals Synthesis and Characterization of a New Bidentate Ligand 5-Substituted-(2-methyl-5-nitro-1-imidazomethyl)-1,3,4-oxadiazole-2-thione and its Metal Complexes of Ag(I), Cu(II) and Zn(II)

2011 ◽  
Vol 8 (s1) ◽  
pp. S127-S136
Author(s):  
Shabbir A. A. Kazi
Keyword(s):  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Thermal Studies ◽  
Bidentate Ligand ◽  
Octahedral Geometry ◽  
Spectral Studies ◽  
Ligand Molecule ◽  
H Nmr ◽  
Elemental Analyses

A new ligand (2-methyl-5-nitro-1-imidazomethyl)-1,3,4-oxadiazole-2-thione (L) and its Ag(I),Cu(II) and Zn(II) complexes were synthesized. The authenticity of the ligand and its transition metal complexes were established by elemental analyses, conductance and magnetic susceptibility measurements, as well as spectroscopic (IR,1H NMR, electronic, mass and ESR) and thermal studies. The IR spectral studies revealed the existence thiol-thione tautamerism in the ligand molecule. The magnetic and electronic spectral studies suggest an octahedral geometry for Cu(II) and Zn(II) complexes. The ligand acts as a bidentate coordinating through the N-3 nitrogen and the exocyclic sulfur atoms of oxadiazole rings. Antimicrobial screening of the ligand and its metal complexes were determined against the bacteriaEscherichia coliandSalmonella paratyphiA.

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