Divalent nickel, cobalt and copper complexes of tetradentate macrocycle, dibenzo (f, n) 2, 4, 10, 12- tetramethyl-1, 5, 9, 13-tetrazacyclohexadeca [16] 1, 3, 9, 11-tetraene

Rana, V. B.; Singh, Prabha; Singh, Deepti; Teotia, M. P.

doi:10.1016/s0277-5387(00)80823-2

Cited by 51 publications

(11 citation statements)

References 12 publications

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“…17 The manganese(II) complex shows a very weak absorption at 390 nm probably due to a spinorbit forbidden transition. The electronic spectrum of the cobalt(II) complex gave two bands, corresponding to octahedral geometry of the cobalt(II), 17,18 which lie in the regions 430 and 400 nm and may reasonably be assigned to the From the molar magnetic susceptibility values, corrected magnetic moments were calculated using Pascal's constants. The magnetic moment value (3.80 B.M.)…”

Section: Resultsmentioning

confidence: 99%

Transition Metal Bis(2-Bromophenyl)disulfide Complexes

Anacona

Gómez

2008

J. Chil. Chem. Soc.

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Section: Resultsmentioning

confidence: 99%

Transition Metal Bis(2-Bromophenyl)disulfide Complexes

Anacona

Gómez

2008

J. Chil. Chem. Soc.

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“…Bands at 1156-1185 cm -1 may be reasonably assigned to C-N stretching vibration. 18,25,26 The above observation strongly suggests 18,22,25,26 that proposed macrocyclic framework is formed. The formation of tellurium containing macrocyclic ring is supported by appearance of new weak intensity bands around 420-410 cm -1 due to Te-N. 18,27 Evidence for the formation of proposed macrocycles and coordination through N atoms is further supported by new medium to weak intensity bands around 480-450 cm -1 assignable to Ni-N 3 stretching.…”

Section: Infra-red Spectramentioning

confidence: 71%

“…The assignment of this sharp band is based on the fact that macrocyclic ligands which have coordinated secondary amino group, have bands 18,[22][23][24] in the vicinity of 3200 cm -1 . This contention finds support 22 from appearance of bands of medium to strong intensity at 1627-1655 cm -1 and 809-827 cm -1 assigned as N-H deformation coupled with N-H out of the plane bending vibrations.…”

Section: Infra-red Spectramentioning

confidence: 99%

Studies on nickel (II) and palladium (II) complexes with some tetraazamacrocycles containing tellurium

Rathee

Verma

2012

JSCS

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The synthesis of 10-membered and 12-membered tellurium containing tetraazamacrocyclic complexes of divalent nickel and palladium by template condensation of diaryltellurium dichlorides, (aryl = p-hydroxyphenyl, 3-methyl-4-hydroxyphenyl, p-methoxyphenyl) with 1,2-diaminoethane and 1,3-diaminopropane in the presence of metal dichloride is reported. The resulting complexes have been subjected to elemental analyses, magnetic measurements, electronic absorption, infra-red, and proton magnetic resonance spectral studies. The formation of proposed macrocyclic skeletons and their donor sites have been identified on the basis of spectral studies. Distorted octahedral structure for the nickel complexes in the solid state and squareplanar structure for the palladium complexes have been suggested

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“…The spectra of all the complexes show nonligand bands in the region 460-640 cm -1 . These are assigned to νM-O and νM-N bands [40][41] . Based on the IR data it is inferred that the ligand HPBH behaves as a monobasic tridentate ligand with O: N: N donor sequence.…”

Section: Infrared Spectral Studiesmentioning

confidence: 99%

Synthesis and Structural Studies on Transition Metal Complexes Derived from 4‐Hydroxy‐4‐methyl–2‐pentanone‐1H‐benzimidazol‐2‐yl‐hydrazone

Neelamma¹,

Rao

Anuradha³

2010

Journal of Chemistry

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Transition metal complexes of Cr(III), Fe(III), Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) with a tridentate ligand, 4-hydroxy-4-methyl-2-pentanone-1H-benzimidazole-2yl-hydrazone (H-HPBH) derived from the condensation of 2-hydrazinobenzimidazole and diacetone alcohol was synthesized. Characterization has been done on the basis of analytical, conductance, thermal and magnetic data, infrared,1H NMR, electronic, mass and ESR spectral data. From analytical and thermal data, the stoichiometry of the complexes has been found to be 1:1 (metal: ligand). Divalent complexes have the general formula [M(HPBH)Cl(H2O)2] in octahedral geometry, [M(HPBH)Cl] in tetrahedral and square planar stereochemistries and trivalent complexes [M(HPBH)Cl2(H2O)] in octahedral disposition. Infrared spectral data suggest that the ligand HPBH behaves as a monobasic tridentate ligand with N: N: O donor sequence towards the metal ions. On the basis of the above physicochemical data, octahedral, tetrahedral and square planar geometries were assigned for the complexes. The ligand and metal complexes were screened for their physiological activities againstE. coliandS. aureus. The order of physiological activity has been found to be Cu(II) > Ni(II) > Zn(II) > Co(II) > Cr(III) > Mn(II) > Fe (III) > ligand againstE.coliand Ni(II) > Cu(II) > Zn(II) > Mn(II) > Cr(III) > Fe(III) > Co(II) > ligand againstS. aureus.

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Divalent nickel, cobalt and copper complexes of tetradentate macrocycle, dibenzo (f, n) 2, 4, 10, 12- tetramethyl-1, 5, 9, 13-tetrazacyclohexadeca [16] 1, 3, 9, 11-tetraene

Cited by 51 publications

References 12 publications

Transition Metal Bis(2-Bromophenyl)disulfide Complexes

Transition Metal Bis(2-Bromophenyl)disulfide Complexes

Studies on nickel (II) and palladium (II) complexes with some tetraazamacrocycles containing tellurium

Synthesis and Structural Studies on Transition Metal Complexes Derived from 4‐Hydroxy‐4‐methyl–2‐pentanone‐1H‐benzimidazol‐2‐yl‐hydrazone

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