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1.
A novel series of complexes of the type [M(TML)X2]; where TML is a tetradentate macrocyclic ligand; M = Co(II), Ni(II), Cu(II) or Zn(II); X = Cl−, CH3COO− or NO
3
−
have been synthesized by template condensation of benzil and thiocarbohydrazide in the presence of divalent metal salts in
methanolic medium. The complexes have been characterized with the help of elemental analyses, conductance measurements, molecular
weight determination, magnetic measurements, electronic, NMR, infrared and far infrared spectral studies. Electronic spectra
along with magnetic moments suggest the six coordinate octahedral geometry for these complexes. The low value of molar conductance
indicates them to be non-electrolytes. The biological activities of metal complexes have been tested in vitro against a number of pathogenic bacteria to assess their inhibiting potential. 相似文献
2.
D. P. Singh Monika Kamboj Krishan Kumar Kiran Jain Chetan Sharma K. R. Aneja 《Russian Journal of Inorganic Chemistry》2011,56(9):1396-1401
A series of the macrocyclic complexes is synthesized by condensation of acetonylacetone and thiocarbohydrazide in the presence
of divalent metal salts in the methanolic medium. The complexes are of the type: [M(TML)X2] where, M = Co(II), Ni(II), Cu(II), Zn(II) and Cd(II); X = Cl− CH3COO− and TML is a tetradentate macrocyclic ligand. The complexes have been characterized with the help of various physicochemical
techniques like elemental analyses, conductance measurements, magnetic measurements, NMR, infrared and electronic spectral
studies. The low value of molar conductance indicates them to be non-electrolyte. On the basis of various studies a distorted
octahedral geometry may be proposed for all the complexes. All the synthesized metal complexes were also tested for their
in vitro antibacterial activities against some bacterial strains. The results obtained were compared with standard antibiotic:
Ciprofloxacin. Some of the tested complexes shows good antibacterial activities against some bacterial strains. 相似文献
3.
A novel tetradentate nitrogen donor [N4] macrocyclic ligand, i.e. 1,3,4,8,9,11-hexaaza-2,10-dithia-5,12-dioxo-7,14-diphenyl-cyclotetradecane (L), has been synthesized. Manganese(II),cobalt(II),
nickel(II) and copper(II) complexes with this ligand have been prepared and subjected to elemental analyses, molar conductance
measurements, magnetic susceptibility measurements, mass, 1H-n.m.r. (Ligand), i.r., electronic, and e.p.r. spectral studies. On the basis of molar conductance the complexes may be formulated
as [M(L)X2] [where M = MnII, CoII, NiII, and CoII,and X = Cl− & NO
3
−
] due to their nonelectrolytic nature in dimethylformamide (DMF). All the complexes are of the high spin type and are six
coordinated. On the basis of i.r., electronic and e.p.r. spectral studies an octahedral geometry has been assigned to MnII, and II, II, complexes, and tetragonal for copper(II) complexes. The antimicrobial activities of the ligand and its complexes, as growth
inhibiting agents, have been screened in vitro against several species of bacteria and plant pathogenic fungi. 相似文献
4.
A new series of complexes is synthesized by template condensation of glyoxal and oxalyldihydrazide in methanolic medium in
the presence of divalent cobalt, nickel, copper, zinc and cadmium salts forming complexes of the type: [M(C8H8N8O4)X2] where M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and X = Cl−1, Br−1, NO
3
−1
, OAc−1. The complexes have been characterized with the help of elemental analyses, conductance measurements, magnetic susceptibility
measurements, electronic, n.m.r., infrared and far infrared spectral studies. On the basis of these studies, a six coordinate
octahedral geometry for these complexes has been proposed. The biological activities of the metal complexes have been tested
in vitro against a number of pathogenic bacteria to assess their inhibiting potential. Most of the compounds have been found to exhibit
remarkable antibacterial activities. 相似文献
5.
D. P. Singh V. Malik R. Kumar K. Kumar J. Singh 《Russian Journal of Coordination Chemistry》2009,35(10):740-745
A new series of the macrocyclic complexes of type [M(C18H16N4O2)X2], where M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and X = Cl−, NO3−, CH3COO−, has been synthesized by the condensation of succinyldihydrazide with benzil in the presence of bivalent metal ions. The
complexes have been characterized with the aid of elemental analyses, conductance measurements, and electronic, NMR, and infrared
spectral studies. On the basis of these studies, a six-coordinate distorted octahedral geometry in which two nitrogen and
two carbonyl oxygen atoms are suitably placed for coordination toward metal ion has been proposed for all the complexes. The
complexes were tested for their in vitro antibacterial activity. Some of the complexes showed remarkable antibacterial activity
against some selected bacterial strains. 相似文献
6.
D. P. Singh V. Malik R. Kumar K. Kumar 《Russian Journal of Coordination Chemistry》2010,36(3):220-225
The condensation reaction of succinyldihydrazide with glyoxal in the presence of divalent metal ions (1: 1: 1) results in
the formation of the complexes of type [M(C6H8N4O2)X2], where M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and X = Cl−, NO3−, CH3COO−. The complexes have been characterized with the aid of elemental analyses, conductance measurements and electronic, NMR,
infrared spectral studies. On the basis of these studies, a six-coordinated distorted octahedral geometry in which two nitrogen
and two carbonyl oxygen atoms are suitably placed for coordination toward metal ion, has been proposed for all the complexes.
The complexes were tested for their in vitro antibacterial activity. Some of the complexes showed remarkable antibacterial
activities against some selected bacterial strains. 相似文献
7.
Cobalt(II), nickel(II) and copper(II) complexes are synthesized with 1,3,7,9-tetraaza- 4,6,10,12-tetraphenyl-2,8-dithiacyclododecane,
a tetradentate ligand (L) and characterized by elemental analysis, molar conductance measurements, magnetic susceptibitity
measurements, mass, i.r., electronic and e.p.r. spectral studies. All the complexes are non-electrolytes so they may be formulated
as [M(L)X2] [where, M = Co(II), Ni(II) and Cu(II) and X = Cl− and NO
3
−
]. All the complexes are of high spin type. On the basis of i.r., electronic and e.p.r. spectral studies an octahedral geometry
has been assigned for Co(II) and Ni(II) complexes and tetragonal geometry for Cu(II) complexes. The antimicrobial activities
of the ligand and its complexes, as growth inhibiting agents, have been screened in vitro against two different species of bacteria and plant pathogenic fungi. 相似文献
8.
A novel tetradentate nitrogen donor [N4] macrocyclic ligand, i.e. 1,3,4,8,9,11-hexaaza-2,5,10,12-tetraoxo-7,14-diphenyl-cyclotetradecane (L), has been synthesized. Mn(II), Co(II), Ni(II)
and Cu(II) complexes of this ligand have been prepared and subjected to elemental analyses, molar conductance measurements,
magnetic susceptibility measurements, mass, 1H-n.m.r. (Ligand), i.r., electronic, and e.p.r. spectral studies. On the basis of molar conductance the Mn(II), Co(II) and
Cu(II) complexes may be formulated as [M(L)X2] [where X = Cl− & NO
3
−
] due to their non-electrolytic nature in dimethylformamide (DMF). Whereas the Ni(II) complexes are 1:2 electrolytes and formulated
as [Ni(L)]X2. All the complexes are of the high spin type and are six/four coordinate. On the basis of i.r., electronic and e.p.r. spectral
studies an octahedral geometry has been assigned to Mn(II) and Co(II), square planar for Ni(II) complexes, and tetragonal
for Cu(II) complexes. The antimicrobial activities of the ligand and its complexes, as growth inhibiting agents, have been
screened in vitro against several species of bacteria and plant pathogenic fungi. 相似文献
9.
A novel macrocyclic tetradentate ligand 1,5,8,12-tetraaza-2,4,9,11-tetraphenyl-6,7:13,14-dibenzocyclohexadeca- 1,4,8,11-tetraene
(L) has been synthesized. Cobalt(II), nickel(II), and copper(II) complexes of this ligand have been prepared and characterized
by elemental analysis, molar conductance measurements, magnetic susceptibitity measurements, and mass, IR, electronic, and
ESR spectral studies. The molar conductance measurements correspond to a nonelectrolytic nature for all the complexes, which
can be formulated as [M(L)X2] (where M = Co(II), Ni(II), and Cu(II); X = Cl− and NO3−). On the basis of IR, electronic, and ESR spectral studies, an octahedral geometry has been assigned to the Co(II) and Ni(II)
complexes, whereas a tetragonal geometry was found for the Cu(II) complexes. The investigated compounds and uncomplexed metal
salts and the ligands were tested against bacterial species like Sarcina lutea, Escherchia coli, and Staphylococcus aureus. The metal complexes have higher activity than the free ligand and metal salts.
The text was submitted by the authors in English. 相似文献
10.
Reactions of Pentapseudohalonitrosyl ferrate(II) with Morpholinobenzyl benzamide(MBB) and Piperidinobenzyl benzamide(PBB)
formed complexes of the type, [Fe(X)3(NO)(L–L)] where X = CN−, NCO− and N
3
−
and L–L = Morpholinobenzyl benzamide(MBB) and Piperidinobenzyl benzamide(PBB). These compounds have been characterized
by various physico-chemical techniques such as elemental analysis, molar conductance, magnetic susceptibility measurements,
i.r., electronic spectra, thermal gravimetric analysis. The molecular modeling Studies have been carried out for structural
analysis for some of the complexes have been carried out using Hyperchem release 7.52 professional version. 相似文献
11.
A novel hexadentate nitrogen donor [N6] macrocyclic ligand viz, 1,5,11,15,21,22-hexaaza-2,14-dimethyl-l4,12-diphenyltricyclo[15.3.1.I(7–11)]docosane[1,4,6,8,10(22)-11,14,16,18,20(21)]decaene
(L), has been synthesised. The Co (II), Ni (II), and Cu (II) complexes with this ligand have been prepared and subjected to
elemental analysis, molar conductance, magnetic susceptibility measurements, mass, 1H NMR (ligand), IR, electronic, and ESR spectral studies and electrochemical investigation. On the basis of molar conductance
the complexes can be formulated as [M(L)]X2 (where M = Co (II), Ni (II), Cu (II) and X = Cl− and NO3−) due to their 1: 2 electrolytic nature in DMSO. All the complexes are of the high-spin type and are six-coordinated. On the
basis of IR, electronic, and ESR spectral studies, an octahedral geometry has been assigned for the Co(II) and Ni(II) complexes,
whereas a tetragonal geometry for the Cu(II) complexes was found. Antimicrobial activity of L and its complexes as growth
inhibiting agents have been screened in vitro against two species (F. moniliformae and R. solani) of plant pathogenic fungi.
The text was submitted by the authors in English. 相似文献
12.
A novel tetradentate nitrogen donor [N4] macrocyclic ligand, i.e. 3,5,13,15,21,22-hexaaza-2,6,12,16-tetramethyl-4,14-dithia-tricyclo[15.3.1.1(7–11)]docosane-1(21),2,5,7,9,11(22),12,15,17,19-decaene,
has been synthesized. Mn(II), Co(II), Ni(II) and Cu(II) complexes with this ligand have been prepared and subjected to elemental
analyses, molar conductance measurements, magnetic susceptibility measurements, mass, 1H-n.m.r. (Ligand), i.r., electronic, and e.p.r. spectral studies. On the basis of molar conductance the complexes may be formulated
as [M(L)X2] and [Ni(L)]X2 [where M = Mn(II), Co(II) and Cu(II), and X = Cl− and NO3−] due to their nonelectrolytic nature in dimethylsulphoxide (DMSO). All the complexes are of the high spin type and are six
coordinated. On the basis of i.r., electronic and e.p.r. spectral studies an octahedral geometry has been assigned to Mn(II)
and Co(II), square planar for Ni(II) complexes, and tetragonal for Cu(II) complexes. The antimicrobial activities of the ligand
and its complexes, as growth inhibiting agents, have been screened in vitro against several species of bacteria and plant pathogenic fungi. 相似文献
13.
14.
M. M. Degtyarik A. S. Lyakhov O. A. Ivashkevich Yu. V. Grigoriev 《Russian Journal of Coordination Chemistry》2012,38(2):77-85
The reactions of Co(II), Ni(II), and Cu(II) chlorides and bromides and their metallic powders with tetrazol-1-yl-tris(hydroxymethyl)methane
(L) afforded new complexes ML2Hal2 · mH2O(M = Co(II) or Ni(II), Hal = Cl−; M = Cu(II), Hal = Cl− or Br−, m = 0; and M = Co(II) or Ni(II), Hal = Br−, m = 2), MLnCl2 (M = Co(II) or Ni(II), n = 2 or 4; M = Cu(II), n = 2), and MLnBr2 · mH2O (M = Ni(II), n = 2, m = 2; M = Cu(II), n = 2, m = 0). The compositions and structures of the synthesized complexes were determined by elemental analysis, IR spectroscopy
(50–4000 cm−1), and X-ray diffraction analysis. The introduction of a bulky substituent into position 1 of the tetrazole cycle was shown
to exert almost no effect on the coordination mode but affected the composition and structure of the complexes. 相似文献
15.
Moamen S. Refat Sulekh Chandra Monika Tyagi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1):22-33
Mn(II), Co(II), Ni(II), and Cu(II) complexes have been synthesized with benzil bis(thiosemicarbazone) (L) and characterized by elemental analyses, molar conductance measurements, magnetic susceptibility measurements, thermogravimetric studies, infrared (IR), electronic, and electron paramagnetic resonance (eEPR) spectral studies. The molar conductance measurements of the complexes in DMF correspond to the non-electrolytic nature of the complexes. Thus these complexes may be formulated as [M(L)X2] (where M = Mn(II), Co(II), Ni(II), Cu(II) and X = Cl? and NO3 ?). On the basis of IR, electronic, and EPR spectral studies, an octahedral geometry has been assigned for Mn(II), Co(II), and Ni(II) complexes, whereas a tetragonal geometry for the Cu(II) complexes is presumed. The free ligand and its metal complexes were tested against the phytopathogenic fungi (i.e., Rhizoctonia baticola, Alternaria alternata) in vitro. 相似文献
16.
Farukh Arjmand Shamima Parveen Mala Chauhan Shaiba Parveen Sartaj Tabassum 《Transition Metal Chemistry》2006,31(2):237-245
New mononuclear and dinuclear complexes [3-hydroxyethyl-1,3,5,8,11pentaazacyclotridecane]copper(II) (1)/nickel(II) (2) perchlorate and O,O ethane bridged bis-copper(II) (3)/nickel(II) (4) macrocycles have been synthesized and characterized by various spectroscopic techniques, viz. i.r., n.m.r., e.p.r., u.v.–vis. and conductance measurements. Spectral data and conductance measurements reveal that all
the complexes are consistent with square-planar geometry and are ionic in nature. The catalytic activity of the dinuclear
Cu(II) complex (3) in the presence of pyrocatechol was determined spectrometrically by monitoring the increase of the o-benzoquinone characteristic absorption band at 25,000 cm−1 with respect to time in DMF saturated with molecular oxygen. The kinetic parameters Vmax (2.8×10−3 M s−1) and KM (1.4×10−3 mm) have been determined by Michaelis–Menten method. Electrochemistry of the dinuclear Cu(II) complex has been studied in the
presence of molecular oxygen with pyrocatechol and without pyrocatechol at a scan rate of 0.1 V s−1 by cyclic voltammetry. On addition of pyrocatechol, complex shows a shift in Epc, Epa and E1/2 values indicating the oxidation of substrate (pyrocatechol). 相似文献
17.
N. I. Matskevich 《Journal of Thermal Analysis and Calorimetry》2007,90(3):955-958
Enthalpy of formation of the perovskite-related oxide BaCe0.9In0.1O2.95 has been determined at 298.15 K by solution calorimetry. Solution enthalpies of barium cerate doped with indium and mixture
of BaCl2, CeCl3, InCl3 in ratio 1:0.9:0.1 have been measured in 1 M HCl with 0.1 M KI. The standard formation enthalpy of BaCe0.9In0.1O2.95 has been calculated as −1611.7±2.6 kJ mol−1. Room-temperature stability of this compound has been assessed in terms of parent binary oxides. The formation enthalpy of
barium cerate doped by indium from the mixture of binary oxides is Δox
H
0 (298.15 K)=−36.2±3.4 kJ mol−1. 相似文献
18.
Mozaffar Asadi Maryam Mohammadikish Khosro Mohammadi 《Central European Journal of Chemistry》2010,8(2):291-299
Four Schiff base ligands, salabza-H2 = N,N′-bis(salicylidene)-2-aminobenzylamine, were synthesized by condensation of one mole of 2-aminobenzylamine and two moles of
salicylaldehyde and/or two moles of substituted salicylaldehyde (5-OMe, 5-Br, 5-NO2). All the four Schiff bases and their Mn(II), Co(II), Cu(II) and Zn(II) complexes are characterized by UV-Vis, FT-IR, 1H NMR spectroscopy, mass spectrometry and elemental analysis. The formation constants and the Gibbs free energies were measured
spectrophotometrically for 1:1 complexes in methanol in constant ionic strength (I = 0.1 mol dm−3 NaClO4) and at 25°C. The data refinement was carried out with the SQUAD program. The trend of formation constants of H2L1 with M(II) follows the order: Mn(II) (3.97) < Zn(II) (4.30) < Co(II) (4.89) < Cu(II) (5.73) 相似文献
19.
Bin Peng Hui Chao Bin Sun Feng Gao Liang-Nian Ji Jian Zhang 《Transition Metal Chemistry》2007,32(2):271-277
Two novel cobalt(III) mixed-polypyridyl complexes
[Co(bpy)2(dpta)]3+ and [Co(bpy)2(amtp)]3+ (bpy = 2,2′-bipyridine, dpta = dipyrido-[3,2-a;2′,3′-c]-thien-[3,4-c]azine, amtp = 3-amino-1,2,4-triazino[5,6-f]-1,10-phenanthroline)
have been synthesized and characterized. The interaction of CoIII complexes with calf thymus DNA was investigated by spectroscopic and viscosity measurements. Results suggest that the two
complexes bind to DNA via an intercalative mode. Moreover, CoIII complexes have been found to promote the photocleavage of plasmid DNA pBR322 under irradiation at 365 nm. The mechanism studies
reveal that hydroxyl radical (OH•) is likely to be the reactive species responsible for the cleavage of plasmid DNA by [Co(bpy)2(dpta)]3+ and superoxide anion radical (O
2
•−
) acts as the key role in the cleavage reaction of plasmid DNA by [Co(bpy)2(amtp)]3+. 相似文献
20.
Mixed ligand complexes of NiII ion with 1-cyano-1-carboethoxyethylene-2,2-dithiolate (CED2−[S2C = C (CN)(COOC2H5)]2−) as a primary ligand and o-phenylenediamine (OPD), pyridine (py), α-picoline (α-pic), β-picoline (β-pic) or γ-picoline (γ-pic) as secondary ligands have been isolated and characterized on the basis of analytical data, molar
conductance, magnetic susceptibility, electronic and infrared spectral studies. The molar conductance data reveal that the
complexes have 1:1 electrolytic nature in DMF solution. Magnetic and electronic spectral studies suggest distorted octahedral
stereochemistry around NiII ion in its complexes. Infrared spectral studies suggest bidentate chelating behaviour of CED2− ion and OPD while other ligands show unidentate behaviour in their complexes. 相似文献