scholarly journals Synthetic, structural and antifungal studies of coordination compounds of Ru(III), Rh(III) and Ir(III) with tetradentate schiff bases

2006 ◽  
Vol 71 (8-9) ◽  
pp. 917-928 ◽  
Author(s):  
V.K. Sharma ◽  
Ankita Srivastava ◽  
Shipra Srivastava
Keyword(s):  
Spectral Data ◽  
Schiff Bases ◽  
Magnetic Moment ◽  
Coordination Compounds ◽  
Mass Spectra ◽  
Thermal Analyses ◽  
Agar Plate ◽  
Plate Method ◽  
Elemental Analyses ◽  
Fab Mass Spectra

A series of octahedral Ru(III), Rh(III) and Ir(III) complexes have been prepared with tetradentate Schiff bases derived by condensing isatin with 1,2-diaminoethane, 1,3-diaminopropane, 1,4-diaminobutane, 1,2-diaminobenzene and 1,3-diaminobenzene. The obtained complexes were characterized on the basis of their elemental analyses, magnetic moment, conductance, IR electronic, 1HNMR and FAB mass spectra, as well as thermal analyses. The Ru(III) complexes are low spin paramagnetic, while Rh(III) and Ir(III) behave as diamagnetic complexes. The IR spectral data revealed that all the Schiff bases behave as tetradentate and are coordinated to Ru(III), Rh(III) and Ir(III) via nitrogen and oxygen. Antifungal studies of the ligands as well as their complexes were carried out by the agar plate method.

Synthesis, Characterisation and Antimicrobial Activity of Manganese(II), nickel(II), cobalt(II), Copper(II) and Zinc(II) Complexes of a Binucleating Tetradentate Ligand

2002 ◽  
Vol 2002 (11) ◽  
pp. 529-531 ◽  
Author(s):  
Abdou Saad El-Tabl
Keyword(s):  
Antimicrobial Activity ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Magnetic Moment ◽  
Thermal Analyses ◽  
Antimicrobial Activities ◽  
Esr Spectra ◽  
Tetradentate Ligand ◽  
Tetradentate Schiff Base ◽  
Elemental Analyses

The binucleating, tetradentate Schiff base ligand (H2L) has been synthesised by condensation of bis-(4-aminophenyl)-methane with salicyladehyde. The resulting metal(II) complexes [metal = Mn||, Ni||, Co||, Cu|| and Zn||] have been characterised by elemental analyses, molar conductances, magnetic moment, IR, UV-vis spectra, thermal analyses (DTA and TGA) and ESR spectra. Antimicrobial activities of the ligand and its metal(II) complexes have been tested against different microorganisms. The electrochemical data of complexes (2), (9) and (10) are discussed.

scholarly journals Synthesis and Characterization of Some Novel Schiff Base Complexes of Oxovanadium(IV) Cation

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
A. K. Yadava ◽  
H. S. Yadav ◽  
Sanjay Singh ◽  
U. S. Yadav ◽  
D. P. Rao
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
Magnetic Moment ◽  
Electrical Conductance ◽  
Schiff Base Complexes ◽  
Synthesis And Characterization ◽  
Electronic Spectral Data ◽  
Elemental Analyses ◽  
Tetraazamacrocyclic Ligands

A series of oxovanadium(IV) complexes of the type [VO(mac)]SO4(where mac = tetraazamacrocyclic ligands derived from condensation of 4,4,4-trifluro-1-(2-furyl)-1,3-butanedione or 4,4,4-trifluro-1-(2-thenyl)-1,3-butanedione withp-phenylenediamine and their reaction withβ-diketones) have been prepared using oxometal ion of vanadium as kinetic template. These complexes have been ascertained by electrical conductance, magnetic moment, elemental analyses, infrared, e.s.r. and electronic spectral data. All the oxovanadium(IV) complexes are five-coordinate ones.

scholarly journals Immobilised nickel(II), dioxomolybdenum(VI) and dioxouranium(VI) complexes on polystyrene resin

2021 ◽  
Vol 23 (06) ◽  
pp. 11201-1127
Author(s):  
Amit Kumar ◽  
◽  
Praveen Kumar Gupta ◽  
Sunil Kumar ◽  
Dinesh Kumar ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Schiff Bases ◽  
Coordination Compounds ◽  
Metal Salt ◽  
Donor Behavior ◽  
Square Planar ◽  
Elemental Analyses ◽  
Ir Reflectance ◽  
Polystyrene Resin ◽  
Supported Ni

New polystyrene supported mixed Schiff bases(PSCH 2 –LH 2 ) and their coordination compounds with nickel(II), dioxomolybdenum(VI), and dioxouranium(VI) have been synthesized. PSCH 2 –LH 2 have been synthesized by the reaction of chloromethylated polystyrene crosslinked with divinylbenzene(PSCH 2 –Cl) and the Schiff bases(LH 2 ) derived from 3-formylsalicylic acid, ethylenediamine or propylene diamine, and acetylacetone. The polystyrene-supported coordination compounds are of the types: PSCH 2 –LM(where M = Ni, MoO 2, UO 2 ). They have been synthesized by the reaction of PSCH 2 –LH 2 and the metal salt/metal coordination compounds in DMF. The coordination compounds have been characterized on the basis of elemental analyses, IR, reflectance, and magnetic susceptibility measurements. The shifts of the ν (C=N)(azomethine), ν (C–O)(phenolic) and ν (C–O)(enolic) stretches indicate the ONNO donor behavior of PSCH 2 –LH 2. The polystyrene-supported Ni(II) compound is square planar; MoO2 (VI) and UO2 (VI) compounds are octahedral and Zr(IV) compounds are pentagonal bipyramidal. The compounds, PSCH 2 –LM(where M = Ni, MoO 2, and UO 2 ) are diamagnetic.

scholarly journals Synthesis, Spectral and Antimicrobial Studies of Bis(cyclopentadienyl)titanium(IV) Derivatives with Schiff Bases Derived from 2-Amino-5-phenyl-1,3,4-thiadiazole

2005 ◽  
Vol 3 (3-4) ◽  
pp. 289-297 ◽  
Author(s):  
A. K. Srivastava ◽  
O. P. Pandey ◽  
S. K. Sengupta
Keyword(s):  
Schiff Bases ◽  
Magnetic Moment ◽  
Electrical Conductance ◽  
Reaction Products ◽  
Bacterial Strains ◽  
H Nmr ◽  
Antimicrobial Studies ◽  
Nmr Data ◽  
Elemental Analyses ◽  
Growth Inhibiting

The reactions of bis(cyclopentadienyl)titanium(IV) dichloride with Schiff bases derived by condensing 2- amino-5-phenyl-1,3,4-thiadiazole with benzaldehyde (SPT), 4-nitrobenzaldehyde (SNT), 4-methoxybenzaldehyde (SMT), 2-hydroxybenzaldehyde (SSTH) or 2-hydroxyacetophenone (SATH) have been studied in refluxing tetrahydrofuran and complexes of types [Cp2TiCl(SB)]Cl (SB= SPT, SNT or SMT) and [Cp2Ti(SB')]Cl (SB'H= SSTH or SATH) have been isolated. Tentative structural conclusions are drawn for these reaction products based upon elemental analyses, electrical conductance, magnetic moment and spectral (UV-vis, IR and1H NMR) data. Studies were conducted to assess the growth-inhibiting potential of the complexes synthesized, and the ligands, against various fungal and bacterial strains.

Novel Schiff Bases with Oxime Groups and Their Homo- and Heteronuclear Copper(II) Complexes

2007 ◽  
Vol 72 (10) ◽  
pp. 1383-1397 ◽  
Author(s):  
Bülent Dede ◽  
Fatma Karipcin ◽  
Mustafa Cengiz
Keyword(s):  
Schiff Bases ◽  
Inductively Coupled Plasma ◽  
Thermal Analyses ◽  
Optical Emission ◽  
Schiff Base Ligands ◽  
Inductively Coupled ◽  
Imine Nitrogen ◽  
Elemental Analyses ◽  
Ft Ir ◽  
C Nmr

Two novel tetradentate Schiff bases containing oxime groups and their homodinuclear, homotrinuclear Cu(II) and heterodinuclear Cu(II)-Mn(II) and Cu(II)-Co(II) complexes were synthesized. The Schiff base ligands (H2L1 and H2L2) were prepared by condensing of diethylenetriamine with 2-(biphenyl-4-yl)-N-(4-chlorophenyl)-N'-hydroxy-2-oxoacetimidamide (HL1) and 2-(biphenyl-4-yl)-N'-hydroxy-N-(4-methylphenyl)-2-oxoacetimidamide (HL2). Structure assignments are supported by a combination of FT-IR, elemental analyses, inductively coupled plasma optical emission spectroscopy (ICP-OES), magnetic susceptibility, molar conductivity and thermal analyses studies. The free ligands were also characterized by 1H and 13C NMR spectra. Elemental analyses, stoichiometric and spectroscopic data indicated that the metal:ligand ratio is 2:1 for the dinuclear copper(II) complexes and 3:2 for the trinuclear copper(II) complexes. The copper(II) ions are coordinated to the oxime and imine nitrogen atoms. Pyrolytic decomposition occurred in melting the metal complexes and metal oxides were the ultimate products.

scholarly journals Some New Derivatives of Organozirconium(IV) with Pyridinedicarboxylic Acids

2012 ◽  
Vol 9 (2) ◽  
pp. 744-748
Author(s):  
Satish C. Dixit ◽  
Rohit K. Singh
Keyword(s):  
Dicarboxylic Acid ◽  
Spectral Data ◽  
Magnetic Moment ◽  
Electrical Conductance ◽  
Pyridine Dicarboxylic Acid ◽  
Elemental Analyses ◽  
Stoichiometric Ratios ◽  
Derivatives Of ◽  
Pyridinedicarboxylic Acids

Reactions of dichlorobis(cyclopentadienyl)zirconium(IV) with pyridinedicarboxylic acidsviz. quinolinic acids (QAH2), 2,4-pyridine dicarboxylic acid (PAH2), isocinchomeronic acid (IAH2), cinchomeronic acid (CAH2) and dinicotinic acid (DAH2) were carried out in different stoichiometric ratios. Complexes of the type Cp2Zr(QAH)Cl, Cp2Zr(QAH)2, Cp2Zr(PAH)Cl, Cp2Zr(PAH)2, Cp2Zr(IAH)Cl, Cp2Zr(IAH)2, Cp2Zr(CAH)Cl, Cp2Zr(CAH)2, Cp2Zr(DAH)Cl and Cp2Zr(DAH)2were obtained. These new complexes were characterized on the basis of their elemental analyses, electrical conductance, magnetic moment and spectral data.

scholarly journals Pyridinedicarboxylic Acid Derivatives of Dichlorobis(cyclopentadienyl)titanium(IV)

2012 ◽  
Vol 9 (1) ◽  
pp. 277-281
Author(s):  
Satish C. Dixit ◽  
Rohit K. Singh
Keyword(s):  
Dicarboxylic Acid ◽  
Spectral Data ◽  
Quinolinic Acid ◽  
Magnetic Moment ◽  
Electrical Conductance ◽  
Dicarboxylic Acids ◽  
Pyridinedicarboxylic Acid ◽  
Pyridine Dicarboxylic Acid ◽  
Elemental Analyses ◽  
Derivatives Of

Reactions of dichlorobis(cyclopentadienyl)titanium(IV) with pyridine dicarboxylic acidsviz. quinolinic acid (QAH2), 2,4-pyridine dicarboxylic acid (PAH2), isocinchomeronic acid (IAH2), cinchomeronic acid (CAH2) and dinicotinic acid (DAH2) were carried out in different stoichiometric ratios. Complexes of the type Cp2Ti(QAH)Cl, Cp2Ti(QAH)2, Cp2Ti(PAH)Cl, Cp2Ti(PAH)2, Cp2Ti(IAH)Cl, Cp2Ti(IAH)2, Cp2Ti(CAH)Cl, Cp2Ti(CAH)2, Cp2Ti(DAH)Cl and Cp2Ti(DAH)2were obtained. These new complexes were characterized on the basis of their elemental analyses, electrical conductance, magnetic moment and spectral data.

Synthesis of 2-amino-5,7-dimethyl-4-oxopyrido[3,4-e]-1,3-thiazines

1983 ◽  
Vol 48 (12) ◽  
pp. 3426-3432 ◽  
Author(s):  
Dušan Koščík ◽  
Pavol Kristian ◽  
Ondrej Forgáč
Keyword(s):  
Spectral Data ◽  
Chlorine Atom ◽  
Mass Spectra ◽  
High Reactivity ◽  
Secondary Amines ◽  
Dimroth Rearrangement ◽  
H Nmr ◽  
New Synthesis ◽  
C Nmr

New synthesis of pyrido[3,4-e]-1,3-thiazines consisting in reaction of 2,6-dimethyl-4-chloronicotinoyl isothiocyanate with primary or secondary amines, or with benzaldehyde phenylhydrazone, is described. High reactivity of the chlorine atom does not allow isolation of the corresponding thioureas, arising as intermediates, except in the case of the benzylamino derivative. Structure of the products was unequivocally confirmed by their spectral data (IR, UV, 1H NMR, 13C NMR and mass spectra). The synthesized derivatives do not undergo the Dimroth rearrangement.

Azaoxa Macrocyclic and Acyclic Complexesof Lanthanides

1998 ◽  
Vol 63 (3) ◽  
pp. 363-370 ◽  
Author(s):  
Violetta Patroniak-Krzyminiewska ◽  
Wanda Radecka-Paryzek
Keyword(s):  
Schiff Base ◽  
Spectral Data ◽  
Macrocyclic Ligand ◽  
Lanthanide Ions ◽  
H Nmr ◽  
Elemental Analyses ◽  
Acyclic Complexes ◽  
Schiff Base Cyclocondensation

The template reactions of 2,6-diacetylpyridine with 3,6-dioxaoctane-1,8-diamine in the presence of dysprosium(III), thulium(III) and lutetium(III) chlorides and erbium(III) perchlorate produce the complexes of 15-membered macrocyclic ligand with an N3O2 set of donor atoms as a result of the [1+1] Schiff base cyclocondensation. In contrast, analogous reactions involving the lighter lanthanide ions (lanthanum(III), samarium(III) and europium(III)) yield the acyclic complexes with terminal acetylpyridyl groupings as products of the partial [2+1] condensation. The complexes were characterized by spectral data (IR, UV-VIS, 1H NMR, MS), and thermogravimetric and elemental analyses.

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