scholarly journals Coordination Polymers of 4,4'-(8-Quinolinolyl-5-methylenoxy) Diphenyl Sulfide

2004 ◽  
Vol 1 (3) ◽  
pp. 158-163 ◽  
Author(s):  
K. D. Patel ◽  
S. C. Panchani
Keyword(s):  
Coordination Polymers ◽  
Diffuse Reflectance ◽  
Bidentate Ligand ◽  
Spectral Studies ◽  
The Novel ◽  
Base Catalyst ◽  
Molecular Weights ◽  
Diphenyl Sulfide ◽  
Elemental Analyses ◽  
Parent Ligand

Coordination polymers containing a novel bis(oxine) bidentate ligand, namely 4,4'-[(8-Quinolinolyl-5-methylenoxy) diphenyl sulfide H2L have been prepared with the metal ions Zn(II), Cu(II), Ni(II), Co(II) and Mn(II). The novelbis-(bidentate) ligand was synthesized by condensation of 5-chloromethyl-8-hydroxyquinoline hydrochloride with 4,4'-dihydroxy diphenyl sulfide in the presence of a base catalyst. All of these coordination polymers and the parent ligand were characterized by elemental analyses, and IR spectral and diffuse reflectance spectral studies. The thermal stability and number-average molecular weights (Mn) of all of the coordination polymers were determined by thermogravimetric analyses and non-aqueous conductometric titrations, respectively. In addition, all of the coordination polymers have been characterized by their magnetic susceptibilities

scholarly journals Coordination Polymers ofN,Nʼ-di-(8-Hydroxyquinolinolyl- 5-methyl)-N,N-diethyl-1,3-propane diamine (QEPD)

2010 ◽  
Vol 7 (3) ◽  
pp. 1023-1028 ◽  
Author(s):  
Asha D. Patel ◽  
Rignesh S. Patel ◽  
Ganpat R. Patel
Keyword(s):  
Thermal Stability ◽  
Coordination Polymers ◽  
Diffuse Reflectance ◽  
Bidentate Ligand ◽  
Spectral Studies ◽  
The Novel ◽  
Magnetic Susceptibilities ◽  
Molecular Weights ◽  
Elemental Analyses ◽  
Parent Ligand

Coordination polymers containing a novel bis(oxine) bidentate ligand, namelyN,Nʼ-di(8-hydroxyquinolinolyl-5-methyl)-N,Nʼ-diethyl-1,3-propane diamine (QEPD) have been prepared with the metal ions Zn(II), Cu(II), Ni(II), Co(II) and Mn(II). The novel bis-(bidentate) ligand was synthesized by condensation of 5-chloromethyl-8-hydroxyquinoline hydrochloride withN,Nʼ-diethyl-1,2- propane diamine in the presence of a base catalyses. All of these coordination polymers and the parent ligand were characterized by elemental analyses, IR spectral and diffuse reflectance spectral studies. The thermal stability and number- average molecular weights (Mn¯) of all of the coordination polymers were determined by thermogravimetric analyses and non-aqueous conductometric titrations, respectively. In addition, all of the coordination polymers have been characterized by their magnetic susceptibilities.

scholarly journals Synthesis, Characterization and Antimicrobial Studies of a New Mannich BaseN-[Morpholino(phenyl)methyl]acetamide and Its Cobalt(II), Nickel(II) and Copper(II) Metal Complexes

2012 ◽  
Vol 9 (2) ◽  
pp. 875-882 ◽  
Author(s):  
L. Muruganandam ◽  
K. Krishnakumar
Keyword(s):  
Magnetic Moment ◽  
Mannich Base ◽  
Carbonyl Oxygen ◽  
Bidentate Ligand ◽  
The Other ◽  
Spectral Studies ◽  
Antimicrobial Studies ◽  
Elemental Analyses ◽  
Nitrato Complexes ◽  
Uv Visible

A new Mannich baseN-[morpholino(phenyl)methyl]acetamide (MBA), was synthesized and characterized by spectral studies. Chelates of MBA with cobalt(II), nickel(II) and copper(II) ions were prepared and characterized by elemental analyses, IR and UV spectral studies. MBA was found to act as a bidentate ligand, bonding through the carbonyl oxygen of acetamide group and CNC nitrogen of morpholine moiety in all the complexes. Based on the magnetic moment values and UV-Visible spectral data, tetracoordinate geometry for nitrato complexes and hexacoordinate geometry for sulphato complexes were assigned. The antimicrobial studies show that the Co(II) nitrato complex is more active than the other complexes.

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 Synthetic, Structural, and Biochemical Studies of Organotin(IV) with Schiff Bases Having Nitrogen and Sulphur Donor Ligands

2006 ◽  
Vol 2006 ◽  
pp. 1-7 ◽  
Author(s):  
Har Lal Singh ◽  
A. K. Varshney
Keyword(s):  
Magnetic Resonance ◽  
Schiff Bases ◽  
Donor Ligands ◽  
Spectral Studies ◽  
Molecular Weights ◽  
Antibacterial And Antifungal Activities ◽  
Elemental Analyses ◽  
Biochemical Studies ◽  
Antibacterial And Antifungal ◽  
Heterocyclic Aldehydes

Three bidentate Schiff bases having nitrogen and sulphur donor sequences were prepared by condensing S-benzyldithiocarbazate (NH2NHCS2CH2C6H5) with heterocyclic aldehydes. The reaction of diphenyltin dichloride with Schiff bases leads to the formation of a new series of organotin(IV) complexes. An attempt has been made to prove their structures on the basis of elemental analyses, conductance measurements, molecular weights determinations, UV, infrared, and multinuclear magnetic resonance (H1,C13, andS119n) spectral studies. Organotin(IV) complexes were five- and six-coordinate. Schiff bases and their corresponding organotin complexes have also been screened for their antibacterial and antifungal activities and found to be quite active in this respect.

scholarly journals New Ternary Transition Metal Complexes of 2-{[(2-aminophenyl)imino] methyl}Phenol and Metformin: Synthesis, Characterization and Antimicrobial Activity

2011 ◽  
Vol 8 (1) ◽  
pp. 361-367 ◽  
Author(s):  
S. S. Sharma ◽  
J. V. Ramani ◽  
D. P. Dalwadi ◽  
J. J. Bhalodia ◽  
N. K. Patel ◽  
...  
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Thermal Studies ◽  
Bidentate Ligand ◽  
Octahedral Geometry ◽  
Tridentate Ligand ◽  
Spectral Studies ◽  
Elemental Analyses

Complexes of Co(II), Ni(II) and Cu(II) were synthesized from Schiff base 2-{[(2-aminophenyl)imino]methyl}phenol and metformin. The authenticity of the transition metal complexes were characterized by elemental analyses, conductance and magnetic susceptibility measurements, as well as spectroscopic (IR, electronic) and thermal studies. IR spectral studies revealed the existence of the ligands in the amine form in the solid state. The magnetic and electronic spectral studies suggest an octahedral geometry for all the complexes. The metformin acts as a bidentate ligand and Schiff base ofo-phynelendiamine and salicylaldehyde acts as a tridentate ligand. Antimicrobial screening of the Schiff base, metformin and transition metal complexes were determined against the bacteriaEscherichia coliandBacillus megaterium.

scholarly journals Synthesis, Characterization, and Antimicrobial Activity of Methyl-2-aminopyridine-4-carboxylate Derivatives

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
S. Nagashree ◽  
P. Mallu ◽  
L. Mallesha ◽  
S. Bindya
Keyword(s):  
Antimicrobial Activity ◽  
Spectral Studies ◽  
H Nmr ◽  
Chemical Structures ◽  
Elemental Analyses ◽  
Ft Ir

A series of methyl-2-aminopyridine-4-carboxylate derivatives,3a–f,were synthesized in order to determine theirin vitroantimicrobial activity. The chemical structures of the synthesized compounds were confirmed by elemental analyses, FT-IR, and1H NMR spectral studies. Among the synthesized compounds,3cand3dshowed good antimicrobial activity compared to other compounds in the series.

scholarly journals Antimicrobial, Antifertility and Antiinflammatory Approach to Tetradentate Macrocyclic Complexes of Iron(II) and Manganese(II)

2002 ◽  
Vol 8 (6) ◽  
pp. 347-353 ◽  
Author(s):  
Ashu Chaudhary ◽  
D. P. Jaroli ◽  
R. V. Singh
Keyword(s):  
Molecular Weight ◽  
Reproductive Organs ◽  
Spectral Studies ◽  
Central Metal Atom ◽  
Central Metal ◽  
Testicular Sperm ◽  
Mass Spectral ◽  
Sperm Density ◽  
Elemental Analyses

Some antifertility inhibitors of 18 to 24-membered tetraazamacrocyclic complexes of iron(II) and manganese(II) have been synthesised by the template condensation using 1,3-phenylenediamine with malonic acid, succinic acid, glutaric acid and adipic acid. The reaction proceed smoothly to completion. The complexes were characterized by elemental analyses, molecular weight determinations, infrared, electronic, magnetic moment, mössbaur and mass spectral studies. The elemental analyses are consistent with the formation of the complexes [M(N4Ln)Cl2] (M = Fe(lI) or Mn(II)). All these complexes are stable and monomeric in nature as indicated by the molecular weight determinations. The spectral studies confirm the octahedral geometry around the central metal atom. The complexes have been screened in vitro against a number of fungi and bacteria to assess their growth inhibiting potential. The testicular sperm density and testicular sperm morphology, sperm motility, density of cauda epididymal spermatozoa and fertility in mating trials and biochemical parameters of reproductive organs have been examined and discussed.

scholarly journals Synthesis, Characterization and Chelating Properties of Benzimidazole-Salicylic Acid Combined Molecule

2009 ◽  
Vol 6 (1) ◽  
pp. 281-288 ◽  
Author(s):  
Kamlesh V. Patel ◽  
Arun Singh
Keyword(s):  
Salicylic Acid ◽  
Transition Metal ◽  
Transition Metal Complexes ◽  
Magnetic Moment ◽  
Mannich Reaction ◽  
Conductivity Measurement ◽  
Molar Conductivity ◽  
Spectral Studies ◽  
Aminosalicylic Acid ◽  
Elemental Analyses

Aminomethylation (i.e.Mannich reaction) of benzimidazole was carried out by treating benzimidalzole with formaldehyde and 4-aminosalicylic acid. The resultant compound was designated as 1-(4-carboxy-3-hydroxyphenyl aminomethyl) benzimidazole (BI-SA). The transition metal complexes of Cu2+, Co2+, Ni2+, Mn2+, Zn2+and Fe3+of BI-SA have been prepared and characterized by elemental analyses, spectral studies, magnetic moment determination, molar conductivity measurement and microbicidal activity.

scholarly journals Synthesis and Bio-Spectral Studies of Co(II) Complex of 5-Chloro-2,4-Dihydroxy Butyrophenoneoxime (CDHBOX)

2010 ◽  
Vol 6 (3) ◽  
pp. 1120-1133
Author(s):  
F. Rehman ◽  
M. Bhardwaj ◽  
U.K. Jetley
Keyword(s):  
Spectral Data ◽  
Standard Free Energy ◽  
Spectral Studies ◽  
Curvularia Lunata ◽  
Mass Spectral ◽  
Ir Studies ◽  
Free Energy Of Formation ◽  
Escherchia Coli ◽  
Elemental Analyses ◽  
Point Determination

Co(II) complex of 5-chloro-2,4-dihydroxy butyrophenoneoxime (CDHBOX) was synthesized from 5-chloro-2,4-dihydroxy butyrophenoneoxime by using standard protocol, and characterized by elemental analyses, melting point determination and spectral data. The ML2 (metal/ligand) stoichiometry of the complex was determined by spectrophotometric and potentiometric studies, and mass spectral data. The value of stability constant of the complex was found to be 6.94x 108 while its standard free energy of formation is 12.155 kcal/mol at 27ºC. Beer’s law is obeyed in the concentration range 2-15 ppm of Co. The value of molar extinction coefficient and sensitivity as per Sandell’s scale were found to 3.35x 103 L.mol-1cm-1and 0.017 μg Co/cm2 respectively. The value of activation energy and the Arrhenius constant Arrhenius constant were found as 4.949 kjmol-1, 74.39. The IR studies reveal that the phenolic proton is lost on complexation and the oxygen of the phenolic (–OH) and nitrogen of the oximino (=NOH) groups coordinate with Co(II) ion. The electronic spectra and magnetic susceptibility measurement indicate that the complex is paramagnetic and tetrahedral in nature. The antimicrobial activity of different concentrations of ligand and its Co(II)-complex  has been evaluated against Curvularia lunata, Fusarium oxysporum and Alternaria alternata fungi  and Streproproteus, Staph, Escherchia coli, Klebsella, and pseudomonas bacteria. The results indicated that the ligand (CDHBOX) and its Co(II) complex have good anti-microbial properties. 

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