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.

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 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.

New heterocycles derived from 2-aminothiophenol

1971 ◽  
Vol 24 (2) ◽  
pp. 405 ◽  
Author(s):  
JL Huppatz ◽  
RMJ Moore
Keyword(s):  
Dicarboxylic Acid ◽  
Spectral Data ◽  
Sulphuric Acid ◽  
Propionic Acid ◽  
Sodium Borohydride ◽  
Polyphosphoric Acid ◽  
Heterocyclic Ring ◽  
Phosphoryl Chloride ◽  
Alternative Synthesis ◽  
Derivatives Of

2-Aminothiophenol reacted with β-propiolactone in ethanol to give β-[o- (β-carboxyethylamino)phenylthio]propionic acid (1) which underwent cyclodehydration in polyphosphoric acid to give derivatives of two new heterocyclic ring systems, viz., 1,8-dioxo-1,2,3,4,5,6,7,8-octahydro-4- thia-5-azaphenanthrene (2) and 4,8-dioxo-3,4,7,8-tetrahydro-2H,6H- [1,4]thiazepino[2,3,4-ij]quinoline (3). Analytical and spectral data are presented which support the structures proposed for these compounds. ��� Alternative synthesis of each heterocycle was achieved by using media other than polyphosphoric acid to cyclize the dicarboxylic acid (1). Phosphoryl chloride gave β-(4-oxo-2,3,4,5-tetrahydro-1,5- benzothiazepin-5-yl)propionic acid (4), which was cylodehydrated smoothly to the thiazepine (3). Concentrated sulphuric acid afforded β- (4-oxo-1,2,3,4-tetrahydroquinol-8-ylthio)propionic acid (6) which was converted into the thiazaphenanthrene (2) by polyphosphoric acid. ��� Bromination reactions and reduction with sodium borohydride of the thiazepine (3) are also described.

scholarly journals SYNTHESIS, SPECTROSCOPIC, THERMAL AND BIOLOGICAL STUDIES ON MANGANESE(III), IRON(III) AND COBALT(III) COMPLEXES WITH BIS(MERCAPTO AZOLES)

2021 ◽  
Vol 9 (11) ◽  
pp. 351-362
Author(s):  
Shilpi Srivastava ◽  
Keyword(s):  
Thermal Stability ◽  
Sodium Hydroxide ◽  
1H Nmr ◽  
Magnetic Moment ◽  
Electrical Conductance ◽  
Antibacterial Activities ◽  
Nmr Data ◽  
Biological Studies ◽  
Elemental Analyses ◽  
Binuclear Products

Complexes of bis(mercapto azoles) i.e. bis(mercapto triazoles), bis(mercapto thiadiazoles) and bis(mercapto oxadiazoles) (LH2) with manganese(III), iron(III) and cobalt(III) have been prepared in methanol in the presence of sodium hydroxide and binuclear products of the type Na[M(L)2(H2O)2] have been isolated. Tentative structural conclusions are drawn for these complexes based upon elemental analyses, electrical conductance, magnetic moment and spectral (electronic, infrared and 1H NMR) data. The thermal stability and mode of decomposition for the complexes have been studied by TG, DTA and DSC techniques. The antifungal, antiviral and antibacterial activities of the ligands and their corresponding complexes were also investigated.

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.

Synthesis, characterization and biological activities of 1,3,4-oxadiazole derivatives of nalidixic acid and their copper complexes

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Nalidixic Acid ◽  
Copper Complexes ◽  
Biological Activities ◽  
Bidentate Coordination ◽  
Antibacterial And Antifungal Activities ◽  
Elemental Analyses ◽  
Oxadiazole Derivatives ◽  
Antibacterial And Antifungal ◽  
Derivatives Of ◽  
Substituted 1

A series of novel 1, 3, 4-oxadiazole analogues was synthesized from cyclization of hydrazones of substituted 1-ethyl-1,4-dihydro-7-methyl-4-oxo-1,8-naphthyridine-3-carbohydrazides were prepared from nalidixic acid. The structures of synthesized oxadiazole derivatives and their copper complexes were elucidated on the basis of FTIR, elemental analyses, 1H-NMR and atomic absorption spectral analysis. It was observed from spectral data that metal ligand ratio was 1:1 in all copper complexes and they were bidentate, coordination was found to be done through oxygen of 4-oxo group and nitrogen of oxadiazole ring. The synthesized compounds were further evaluated with biological activities and compared with parent hydrazones. Copper complexes possess antibacterial and antifungal activities better than the oxadiazoles while they have better antioxidant activity then copper complexes. Parent hydrazones were better in all biological activities than synthesized oxadiazoles.

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.

Synthesis of 4-(3-coumarinyl)-3-benzyl-4-thiazolin-2-one 4-methylbenzylidenehydrazone and determination of the isomeric structure by X-ray analysis

2003 ◽  
Vol 218 (12) ◽  
Author(s):  
Süheyla Özbey ◽  
Nilgün Karalı ◽  
Aysel Gürsoy
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Spectral Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Isomeric Structure ◽  
Elemental Analyses

AbstractIn this study 4-(3-coumarinyl)-3-benzyl-4-thi azolin-2-one 4-methylbenzylidenehydrazone 3 was synthesised. An independent proof of the thiazolylhydrazone structure of 3 was achieved by single crystal X-ray diffraction analysis. Elemental analyses and spectral data (IR,

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