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.

The Metal Complexes of Heterocyclic β-Diketones and their Derivatives, Part VIII Synthesis, Structure, Proton NMR and Infrared Spectral Studies of the Complexes of Al(III), Fe(III), Co(III), Rh(III), In(III), and Zr(IV) with l-Phenyl-3-methyl-4-trifluoroacetyl-pyrazolone-5 (HPMTFP)

1981 ◽  
Vol 36 (2) ◽  
pp. 213-217 ◽  
Author(s):  
Emmanuel Chukwuemeka Okafor
Keyword(s):  
Infrared Spectroscopy ◽  
Ir Spectra ◽  
Metal Complexes ◽  
Magnetic Moment ◽  
Proton Nmr ◽  
Spectral Studies ◽  
Elemental Analyses ◽  
Infrared Spectral ◽  
Pmr Spectra ◽  
Neutral Metal

New complexes of Al(III), Fe(III), Co(III), Rh(III), In(III) and Zr(IV) with 1-phenyl- 3-methyl-4-trifluoroacetyl-pyrazolone-5, (HPMTFP), have been synthesized and characterized by means of elemental analyses, conductivity and magnetic moment measurements, proton NMR and infrared spectroscopy. It is concluded that the ligand, HPMTFP, reacts as a bidentate enol forming neutral metal chelates. The PMR spectra of chelates sufficiently soluble in deuterated NMR solvents were recorded and studied. The IR spectra are measured between 4000-200 cm-1 and assignments are proposed for the observed frequencies. The M-O stretching frequency follows the order: AI > Rh > Fe = Co = Zr > In.

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 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.

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 Spectral Studies of Some Bioactive Transition Metal Complexes of [bis-2-(4-Fluorophenyl)prop-2-enaln]ethane-1,2-diamine

2019 ◽  
Vol 31 (10) ◽  
pp. 2357-2360
Author(s):  
Jagvir Singh ◽  
Anuradha ◽  
Pradeep Kumar ◽  
Mordhwaj ◽  
Ravi Kumar
Keyword(s):  
Staphylococcus Aureus ◽  
Metal Complexes ◽  
Antimicrobial Properties ◽  
Analysis Data ◽  
Antimicrobial Activities ◽  
Spectral Studies ◽  
Elemental Analysis Data ◽  
Chloride Complexes ◽  
Elemental Analyses ◽  
Uv Visible

Co(II), Ni(II) and Cu(II) metal complexes of a novel Schiff base ligand (SBL) derived from condensation of 2-(4-fluorophenyl)prop-2-enaln and ethane-1,2-diamine were synthesized. All the complexes were characterized by elemental analyses, IR, UV-visible spectroscopy, magnetic susceptibility and conductance measurements and 1H NMR. From the elemental analysis data, 1:1 [M]:[ligand] metal chloride complexes are formed having the general composition [M(SBL)Cl2] and [Cu(SBL)] Cl2, [where M = Co(II), Ni(II) and SBL= {bis-2-(4-fluorophenyl)prop-2-enaln}ethane-1,2-diamine]. The result showed that the ligand is coordinated to the metal ions in a neutral tetradentate manner with ON donor sites and the nature of metal-ligand bonding can range from covalent to ionic. Antimicrobial activities of the newly synthesized chemical compounds were evaluated against Staphylococcus aureus (ATCC 25923), Staphylococcus aureus (ATCC 3160), Cabdida albicans (ATCC 227) and Staphylococcus cereviscae (ATCC 361) species and found that metal complexes exhibited more antimicrobial properties so they are more potential and significant than the ligand.

PREPARATION AND CHARACTERIZATION OF SOME BINARY AND TERNARY METAL COMPLEXES OF IMIDAZOLE AND AMINO ACIDS

1966 ◽  
Vol 44 (14) ◽  
pp. 1637-1641 ◽  
Author(s):  
G. N. Rao ◽  
N. C. Li
Keyword(s):  
Aqueous Solution ◽  
Amino Acid ◽  
Metal Complexes ◽  
Proton Magnetic Resonance ◽  
Spectral Studies ◽  
Visible Spectra ◽  
Infrared Spectral ◽  
Ternary Metal ◽  
Ternary Metal Complexes

Five new ternary metal complexes containing imidazole and glycylglycine or amino acid have been prepared and characterized by proton magnetic resonance and infrared spectral studies. Seven new binary metal complexes have also been prepared and studied. The isolation of Cd(imidazole)6Cl2•H2O and Ni(imidazole)6-Cl2•4H2O provides evidence that the coordination number of these metal ions to imidazole in the solid state is six. The visible spectra of the Ni(II) complexes of amino acid and imidazole show that all these are octahedral in aqueous solution.

scholarly journals Synthesis and characterization of cis-dioxomolybdenum(VI) complexes having furil as precursor molecule

2012 ◽  
Vol 77 (9) ◽  
pp. 1205-1210
Author(s):  
Devendra Rao ◽  
Hardeo Yadav ◽  
Ashok Yadava ◽  
Sanjay Singh ◽  
Uma Yadav
Keyword(s):  
Oxygen Transfer ◽  
Chelating Agent ◽  
Molar Conductance ◽  
Octahedral Geometry ◽  
Transfer Reactions ◽  
Synthesis And Characterization ◽  
Precursor Molecule ◽  
Elemental Analyses ◽  
Tetraazamacrocyclic Ligands

Synthesis of some new dioxomolybdenum(VI) complexes having general formula [MoO2(mac)](acac)2, (where mac = tetraazamacrocyclic ligands derived from condensation of furil with 1,2-diaminobenzene or 2,3-diaminopyridine and their reaction with ?-diketones) using dioxometal ion as kinetic template are reported. The prepared complexes have been characterized by molar conductance, elemental analyses, infrared and electronic data. The spectral data indicate that ligands act as tetradentate chelating agent. Due to their biological relevance, molybdenum catalyzed oxygen transfer reactions have great interest. All the dioxomolybdenum(VI) complexes have octahedral geometry with six coordination.

Research on Macro Cyclic Polyamine Complexes of Transition Metal and Catalytic Properties

2013 ◽  
Vol 850-851 ◽  
pp. 24-27
Author(s):  
Hong Lei
Keyword(s):  
Metal Complexes ◽  
Spectroscopic Characterization ◽  
Hydrolytic Activity ◽  
Macrocyclic Polyamine ◽  
Metal Chlorides ◽  
Carbohydrate Ligands ◽  
Coordination Ability ◽  
Important Significance ◽  
Hydrolysis Activity

This article Synthesis of carbohydrate ligands of coordination ability, to react with metal Chlorides to get more stable complexes, and elemental analysis, infrared, Ultraviolet Spectroscopic characterization and analysis of nuclear magnetic resonance. Characterization of its structure and study on the hydrolysis activity of pnitrophenyl picolinate lipid and the activity of pnitrophenol solution of phosphate, disodium macrocyclic polyamine catalyzed by macrocyclic polyamine metal complexes. The results show that the effect of hydrolytic activity of macrocyclic polyamine complexes is much larger than the hydrolysis activity of ordinary metal complexes; it can be important significance to find a better way of cutting nucleic acid by hydroxylation.

scholarly journals Preparation and Characterization of Styrene Bearing Diethanolamine Side Group, Styrene Copolymer Systems, and Their Metal Complexes

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Aslışah Açıkses ◽  
Necmittin Çömez ◽  
Fatih Biryan
Keyword(s):  
Free Radical ◽  
Electrical Properties ◽  
Metal Complexes ◽  
Nmr Spectra ◽  
Side Group ◽  
Conductivity Measurements ◽  
H Nmr ◽  
Ft Ir ◽  
Polymerization Method

The two copolymer systems of styrene bearing diethanol amine side group and styrene were prepared by free radical polymerization method at 60°C in presence of 1,4-dioxane as solvent and AIBN as initiator. Their metal complexes were prepared by reaction of the copolymer used as ligand P(DEAMSt-co-St)L′′ and Ni(II) and Co(II) metal ions, which was carried out in presence of ethanol and NaOH at 65°C for 48 h in pH = 7.5. The structures of the copolymers used as ligand and metal complexes were identified by FT-IR, 1H-NMR spectra, and elemental analysis. The properties of the copolymers used as ligand and metal complexes were characterized by SEM-EDX, AAS, DSC, TGA, and DTA techniques. Then, the electrical properties of the copolymers and metal complexes were examined as a function of the temperature and frequency, and the activation energies (Ea) were estimated with conductivity measurements.

scholarly journals Synthesis and Characterization of New Schiff Bases Derived from N (1)-Substituted Isatin with Dithiooxamide and Their Co(II), Ni(II), Cu(II), Pd(II), and Pt(IV) Complexes

2009 ◽  
Vol 2009 ◽  
pp. 1-12 ◽  
Author(s):  
Ahlam J. Abdul-Ghani ◽  
Asmaa M. N. Khaleel
Keyword(s):  
Schiff Bases ◽  
Antifungal Agents ◽  
Magnetic Moments ◽  
Thermal Studies ◽  
Chloride Content ◽  
Conductivity Measurements ◽  
Proteus Vulgaris ◽  
Elemental Analyses ◽  
Antibacterial And Antifungal

Three new Schiff bases of N-substituted isatin , and = Schiff base of N-acetylisatin, N-benzylisatin, and N-benzoylisatin, respectively, and their metal complexes , , , , , , , , , , , , and , were reported. The complexes were characterized by elemental analyses, metal and chloride content, spectroscopic methods, magnetic moments, conductivity measurements, and thermal studies. Some of these compounds were tested as antibacterial and antifungal agents againstStaphylococcus aureus, Proteus vulgaris, Candida albicans, and Aspergillus niger.

Sign in / Sign up

Export Citation Format

Share Document