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1

Synthesis, Characterization and Antibacterial Activity of Triorganotin(IV) Complexes of 4-Methylphenol

Sharma N., Kumar V., Thakur M., Kumari M., Chaudhry S. C.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 12

2051--2065

EN

The triorganotin(IV) com plex of com po si tion Ph3Sn(OArMe-4) has been synthesized in good yields by the reaction of Ph3SnCl with Me3SiOArMe-4/NaOArMe-4, while complexes of composition Me3Sn(OArMe-4) and n-Bu3Sn(OArMe-4) (where -OArMe-4 = -OC6H4CH3-4) have been obtained from the reaction of Me3SnCl and n-Bu3SnCl with 4-methylphenol in the presence of triethylamine in carbon tetrachloride. The complexes have been characterized by elemental analyses, molar conductance measurements, molecular weight determin tion and IR, 1H and 13C NMR and mass spectral studies. Thermal behaviour of the complexes has been studied by TG and DTA techniques. The organotin(IV) complexes have also been screened for their antibacterial properties and are found to exhibit appreciable activity. The reactions of the complexes with 2-, 3-, 4-cyanopyridines yielded 1:1 adducts as confirmed by physicochemical and IR spectral data.

2

Structural Characterization of Some New Coordination Compounds of Tin(II) with Schiff Bases of Sulpha Drugs

Maheshwari R., Sharma S., Bedi M., Varshney A.K.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 7

1361-1365

EN

Some new coordination compounds of tin(II) have been synthesized by the reaction of tin(II) methoxide with the Schiff bases prepared by condensation of aldehyde/ketones with sulpha drugs. These complexes have been characterized on the basis of elemental analysis, ultraviolet, infrared, 1H NMR and 119Sn NMR spectral studies. The analytical data of complexes indicate 1:2 metal ligand stoichiometry of the type of [ML2], where M = Sn(II). The ligands be haved as bidentate chelating agents and bonded to the metal ion through imines nitrogen and ox ygen atom of either moiety of ligand. The antibacterial activities of the ligands and their tin(II) coordination compounds have been screened in vitro against the o ga ism Escherichia coli, Staphylococus aureus, Prouteus mirabilis,and Bacillus thurengiensis.

3

Coordinating Behavior of a Macrocyclic Amide Ligand towards Lanthanide Ions: Synthesis and Spectral Studies of Lanthanide(III) Complexes with N,N'-Bis(2-hydroxyphenyl)pyridine-2,6-dicarboxamide

Gudasi K., Shenoy R., Vadavi R., Patil S., Havanur V.

Polish Journal of Chemistry

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2006

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Vol. 80, nr 3

357-365

EN

Seven coordinate lanthanide(III) complexes with N,N'-bis(2-hydroxyphenyl)- pyridine-2,6-dicarboxamide (BHPPDAH) with the general composition [Ln(BHPPDA)(H2O)2]NO3, where Ln = La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III), Dy(III) and Y(III), have been isolated. The complexes have been characterized based on magnetic susceptibility, conductivity studies, IR, NMR, UV-VIS, EPR and thermal studies. The ligand binds to themetal centre through pyridine and amide nitrogens and doubly deprotonated phenolic oxygens. Biological evaluation of the complexes indicates enhanced activity compared with that of free ligand.

4

Synthesis and Spectral Studies on 16-Membered Diamidediimine Tetraazamacrocyclic Complexes, [MLCi]Cl [M.=Mn(ii), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II)]

Shakir M., Khatoon S.

Polish Journal of Chemistry

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2005

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Vol. 79 / nr 10

1627-1633

EN

A series of 16-membered diamidediimine tetraazamacrocyclic complexes of the type [MLCl]Cl, [M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II)] bearing amide groups have been synthesized by the template condensation of o-aminobenzoic acid with phthalaldehyde and 1,2-diaminoethane in the presence of transition metal ions. The stoichiometry of proposed macrocyclic complexes has been ascertained on the basis of results of elemental analyses and conductivity measurements. The mode of bonding of macrocyclic moiety and the overall geometry around metal ion have been confirmed by IR, 1H-NMR, reflectance and UV-Vis studies. A pseudo-octahedral geometry has been suggested for all the complexes in DMSO, while a pentacoordination around metal ions has been noticed in reflectance spectra of Fe(II), Co(II), Ni(II) and Cu(II) complexes.

5

Metal Directed Synthesis of Hexaazamacrocyclic Complexes of Co(II), Ni(II), Cu(II) and Zn(II) and Their Physico-Chemical Studies

Shakir M., Azim Y., Chishti H., Chingsubam P.

Polish Journal of Chemistry

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2005

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Vol. 79 / nr 7

1115-1121

EN

A series of 18-membered N6 macrocyclic complexes was synthesized by template condensation of alfa,alfa'-dibromo-o-xylene and 2,6-diaminopyridine. The proposed stoichiometry and nature of the macrocyclic complexes have been confirmed on the basis of elemental analyses and conductivity data, respectively. The bonding in these complexes has been elucidated from the IR, and 1H-NMR spectral studies, while the overall geometry has been deduced from the UV-visible, magnetic measurements and EPR spectra.

6

Mononuclear and Binuclear Copper(II) Complexes of Phenylhydrazoacetylacetone Isonicotinoylhydrazone

El-Bahnasawy R., El-Tabl A., El-Shereafy E., Kashar T., Issa Y.

Polish Journal of Chemistry

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1999

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Vol. 73, nr 12

1925-1935

EN

Copper(II) complexes of phenylhydrazoacetylacetone isonicotinoylhydrazone (PHAH) have been prepared and characterized by elemental and thermal analyses, conductance, magnetic moment, IR and UV-VIS spectra. The conductances indicate that the complexes are nonelectrolytes. In neutral solutions, mononuclear complexes have been obtained, however, in the presence of ammonia, the mononuclear comlex and binuclear complexes have been isolated.

7

ESR studies on copper(II) complexes of 1,3-diaminopropane and 1,2-diaminopropane

Ayad M., El-Tabl A.

Polish Journal of Chemistry

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1999

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vol. 73 nr 2

263-269

EN

The synthesis and characterization of (NH2RNH2)3CuCl2×H20 complexes, where R=(-CH2-)3 or (-CH(CH3)-CH2-) are reported. The complexes are octahedral. The ESR spectra of polycrystalline samples showed broad lines, which indicate spin-exchange interactions between copper(II) ions. In solution at 77K, the spectra show axial type symmetry with dx2-y2 ground state of a tetragonal distortion around copper(II) ion. The bonding parameters a22 and b21 indicate a covalent character of in-plane s and p bondings, while b2 indicates ionic out-of-plane p bondings. d-Orbital populations of the complexes indicate, that the unpaired electron site is mainly in dx2-y2 orbital.

8

Synthesis and spectral characterization of Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) complex produced from the template reaction of diacetyloxime

El-Tabl A.S., Kashar T.I.

Polish Journal of Chemistry

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1998

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Vol. 72, nr 3

519-526

EN

A new series of Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) complexes obtained by the template reaction of diacetyloxime and 1,2-diaminopropane with metal ions have been synthesized and characterized by elemental analyses, IR, VIS-UV, electrical conductivity, magnetic moment and ESR measurements. ESR spectrum of Cu(II) complex exhibits an axial type symmetry d(x(2)-y(2)) with covalent bond character. ESR spectrum of Ni(I) at 77K formed by exposing the Ni(II) complex to ionizing radiation, points on d(x(2)-y(2)) ground state. ESR spectrum of Fe(III) complex presents a low spin (57)Fe(I=1/2), d(5), configuration with D(z)(2)) ground state.

9

Synthesis and characterization of Zn(II), Cd(II) and Hg(II) complexes of isonicotinoyl hydrazone derived from orthohydroxybenzeneazoethylacetoacetate

Kashar T.I., El-Tabl A.S., El-Bahnasawy R.M.

Polish Journal of Chemistry

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1998

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Vol. 72, nr 9

2037-2044

EN

Mononuclear and binuclear Zn(II), Cd(II) and Hg(II) complexes of orthohydroxybenzeneazoethylacetoacetate isonicotinoyl hydrazone (H3L), have been synthesized and characterized by elemental analyses, IR, (1)H NMR and VIS-UV spectra, conductance and thermal analyses. The ligand behaves as tetradentate in mononuclear complexes and hexadentate in binuclear complexes. The molar conductance of the complexes has been discussed.