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 Preparation and Spectroscopic Characterization of Polymer-Supported Transition Metal Complexes

2019 ◽  
Vol 31 (9) ◽  
pp. 2087-2090
Author(s):  
P.K. Gupta ◽  
Dinesh Kumar ◽  
Amit Kumar
Keyword(s):  
Schiff Base ◽  
Coordination Compounds ◽  
Metal Salt ◽  
Spectroscopic Characterization ◽  
Square Planar ◽  
Elemental Analyses ◽  
Ir Reflectance ◽  
Donor Behaviour ◽  
Solvent Molecules

Novel polystyrene supported mixed Schiff base (PSCH2–LH2) and its coordination compounds with copper(II) and zirconium(IV) have been synthesized. PSCH2–LH2 has been synthesized by the reaction of chloromethylated polystyrene crosslinked with divinylbenzene (PSCH2–Cl) and the Schiff base (LH2) derived from 3-formylsalicylic acid, propylenediamine and acetylacetone. The polystyrene supported coordination compounds are of the types: [PSCH2–LCu] and [PSCH2–LZr(OH)2·DMF]. They have been synthesized by the reaction of PSCH2–LH2 and the metal salt in DMF. The coordination compounds have been characterized on the basis of elemental analyses, IR, reflectance, ESR spectral 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 behaviour of PSCH2–LH2. The polystyrene supported Cu(II) compound is square planar and Zr(IV) compound is pentagonal bipyramidal. The coordinated solvent molecules are completely lost from metal bound coordination compound by heating them at definite temperature in an air oven for 3 h. The compound, PSCH2–LCu is paramagnetic, while PSCH2–LZr(OH)2·DMF is diamagnetic.

scholarly journals Syntheses, Magnetic and Spectral Studies on the Coordination Compounds of the Polystyrene-anchored Thiazolidin-4-one

2012 ◽  
Vol 9 (4) ◽  
pp. 2532-2539 ◽  
Author(s):  
Dinesh Kumar ◽  
Amit Kumar
Keyword(s):  
Coordination Compounds ◽  
Acid Hydrazide ◽  
Mercaptoacetic Acid ◽  
Spectral Studies ◽  
Donor Ligand ◽  
Square Planar ◽  
Elemental Analyses ◽  
Ir Reflectance ◽  
Bipyramidal Structure ◽  
Monodentate Ligands

The reaction between polystyrene 3-formylsalicylate and thiophene-2-carboxylic acid hydrazide in DMF in the presence of ethyl acetate results in the formation of polystyrene N-(2-carbamoylthienyl)-3'-carboxy-2'-hydroxybenzylideneimine (I). A benzene suspension of I reacts with mercaptoacetic acid and forms the polystyrene N-(2-carbamoylthienyl)-C-(3'-carboxy-2'-hydroxyphenyl) thiazolidin-4-one, PSCH2–LH2(II). A DMF suspension of II reacts with Zn(II), Co(II), Cu(II), Zr(OH)2(IV) and MoO2(VI) ions and forms the corresponding polystyrene-anchored coordination compounds, [PSCH2–LZn(DMF)] (III), [PSCH2–LCo(DMF)3] (IV), [PSCH2–LHCu(OAc)] (V), [PSCH2–LH2Zr(OH)2(OAc)2] (VI) and [PSCH2–LHMoO2(acac)] (VII) respectively. The polystyrene-anchored coordination compounds have been characterized on the basis of elemental analyses, spectral (IR, reflectance, ESR) studies and magnetic susceptibility measurements. II acts as a neutral tridentate ONS donor ligand in VI, a monobasic bidentate OS donor ligand in VII, a monobasic tridentate ONS donor ligand in V and a dibasic tridentate ONO donor ligand in III and IV. The acetato groups behave as monodentate ligands in V and VI. A square-planar structure for V, a tetrahedral structure for III, an octahedral structure for IV and VII and a pentagonal-bipyramidal structure for VI are suggested.

scholarly journals Physico-Chemical Studies on the Coordination Compounds of Thiazolidin-4-One

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Dinesh Kumar ◽  
Amit Kumar ◽  
Jyoti Sharma
Keyword(s):  
Coordination Compounds ◽  
Benzene Solution ◽  
Molar Conductance ◽  
Mercaptoacetic Acid ◽  
Donor Ligand ◽  
Physico Chemical ◽  
Square Planar ◽  
Elemental Analyses ◽  
Ir Reflectance ◽  
Chemical Studies

A dry benzene solution of the Schiff base,N-(2-hydroxyphenyl)-3′-carboxy-2′-hydroxybenzylideneimine upon reacting with mercaptoacetic acid undergoes cyclization and formsN-(2-hydroxyphenyl)-C-(3′-carboxy-2′-hydroxyphenyl)thiazolidin-4-one, LH3(I). A MeOH solution ofIreacts with , , , and Mo ions and forms the monomeric coordination compounds, [Mn(LH)(MeOH)3] (II), [Cu(LH)(MeOH)] (III), [Zn(LH)(MeOH)] (IV), [FeCl(LH)(MeOH)2] (V), and [MoO2(LH)(MeOH)](VI). The coordination compounds have been characterized on the basis of elemental analyses, molar conductance, molecular weight, spectral (IR, reflectance, ESR) studies, and magnetic susceptibility measurements.Ibehaves as a dibasic tridentate OOS donor ligand in these compounds. The compounds are nonelectrolytes ( = 6.2–13.8 mho cm2 mol−1) in DMF. A square-planar structure forIII; a tetrahedral structure forIVand an octahedral structure forII,V, andVIare suggested.

scholarly journals Nickel(II) and palladium(II) chelates of dehydroacetic acid Schiff bases derived from thiosemicarbazide and hydrazinecarbodithioate

1994 ◽  
Vol 72 (8) ◽  
pp. 1785-1788 ◽  
Author(s):  
Abdulla Al Kubaisi ◽  
Kamal Z. Ismail
Keyword(s):  
Molecular Weight ◽  
Schiff Bases ◽  
Acid Amide ◽  
Organic Ligands ◽  
Resonance Spectroscopy ◽  
Molecular Weight Determination ◽  
Lewis Bases ◽  
Dehydroacetic Acid ◽  
Square Planar ◽  
Elemental Analyses

Dehydroacetic acid Schiff bases DAE (1) and DATS (2) were isolated from the reaction of dehydroacetic acid (2-acetyl-5-hydroxy-3-oxo-4-hexenoic acid-δ-lactone) with hydrazine-S-methylcarbodithioate and the corresponding acid amide, thiosemicarbazide, respectively. Reaction of such Schiff bases with nickel(II) and palladium(II) ions afforded the dimeric monoligand chelates [M(DAE-2H)]2 and [M(DATS-2H)]2; M = Ni(II) or Pd(II). In the presence of monodentate Lewis bases, B, square-planar chelates [M(DAE-2H)B] and [M(DATS-2H)B], in which B = pyridine or triphenylphosphine, were isolated. The stoichiometry and structure of the isolated organic ligands and their chelates were confirmed through elemental analyses, molecular weight determination, and infrared, ultraviolet–visible, and 1H and 13C nuclear magnetic resonance spectroscopy.

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.

scholarly journals Syntheses, Magnetic, Spectral and Biological Studies on the Coordination Compounds of N-(2-Hydroxyphenyl)-C-(3′- Carboxy-2′-Hydroxyphenyl) Thiazolidin-4-One

2021 ◽  
Vol 23 (08) ◽  
pp. 135-142
Author(s):  
Praveen Kumar Gupta ◽  
◽  
Amit Kumar ◽  
Dinesh Kumar ◽  
◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Benzene Solution ◽  
Antibacterial Activities ◽  
Molar Conductance ◽  
Mercaptoacetic Acid ◽  
Donor Ligand ◽  
Gram Positive Bacteria ◽  
Biological Studies ◽  
Elemental Analyses ◽  
Ir Reflectance

A dry benzene solution of the Schiff base, N-(2-hydroxyphenyl)-3′-carboxy-2′- hydroxybenzylideneimine upon reacting with mercaptoacetic acid undergoes cyclization and forms N- (2-hydroxyphenyl)-C-(3′-carboxy-2′-hydroxyphenyl)thiazolidin-4-one, LH3 (I). A MeOH solution of I reacts with Ni(II) and UO2(VI) ions and forms the monomeric coordination compounds, [Ni(LH)(MeOH)3] and [UO2(LH)(MeOH)]. The coordination compounds have been characterized on the basis of elemental analyses, molar conductance, molecular weight, spectral (IR, reflectance) studies and magnetic susceptibility measurements. I behaves as a dibasic tridentate OOS donor ligand in these compounds. The compounds are non-electrolytes (M = 4.3-6.4 mho cm2 mol-1) in DMF. Octahedral structure for Ni(II) and UO2(VI) compounds are suggested. LH3 (I) and its complexes while testing with E.Coli. (Gram Negative) and S. Aureus (Gram positive) bacteria show antibacterial activities.

scholarly journals Syntheses, Spectral Characterization, and Antimicrobial Studies on the Coordination Compounds of Metal Ions with Schiff Base Containing Both Aliphatic and Aromatic Hydrazide Moieties

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Dinesh Kumar ◽  
Silky Chadda ◽  
Jyoti Sharma ◽  
Parveen Surain
Keyword(s):  
Schiff Base ◽  
Coordination Compounds ◽  
Molar Conductance ◽  
Equimolar Ratio ◽  
Gram Positive Bacteria ◽  
H Nmr ◽  
Antimicrobial Studies ◽  
Elemental Analyses ◽  
Ir Reflectance ◽  
Bipyramidal Structure

An EtOH solution of 3-ketobutanehydrazide and salicylhydrazide on refluxing in equimolar ratio forms the corresponding Schiff base, LH3(1). The latter reacts with Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Zr(OH)2(IV), MoO2(VI), and UO2(VI) ions in equimolar ratio and forms the corresponding coordination compounds, [M(LH)(MeOH)3] (2, M = Mn, Co, Ni), [Cu(LH)]2(3), [M′(LH)(MeOH)] (4, M′ = Zn, Cd), [Zr(OH)2(LH)(MeOH)2] (5), [MoO2(LH)(MeOH)] (6), and [UO2(LH)(MeOH)] (7). The coordination compounds have been characterized on the basis of elemental analyses, molar conductance, spectral (IR, reflectance,1H NMR, ESR) studies, and magnetic susceptibility measurements. They are nonelectrolytes in DMSO. The coordination compounds, except3, are monomers in diphenyl. They are active against gram-positive bacteria (S. aureus, B. subtilis), gram-negative bacteria (E. coli, P. aeruginosa), and yeast (S. cerevisiae, C. albicans).1acts as a dibasic tridentate ONO donor ligand in2–7coordinating through its both enolic O and azomethine N atoms. The coordination compounds2and3are paramagnetic, while rest of the compounds are diamagnetic. A square-planar structure to3, a tetrahedral structure to4, an octahedral structure to2,6, and7, and a pentagonal bipyramidal structure to5are proposed.

scholarly journals Synthesis, Characterization and Biological Activity of Schiff Bases Chelates with Mn(II),Co(II),Ni (II),Cu(II) and Hg(II)

2017 ◽  
Vol 14 (2) ◽  
pp. 390-402 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Magnetic Susceptibility ◽  
Biological Activity ◽  
Benzoic Acid ◽  
Spectral Data ◽  
Schiff Bases ◽  
Structural Features ◽  
Molar Conductance ◽  
Octahedral Geometry ◽  
Square Planar

In this paper, some series of new complexes of Mn(II), Co(II), Ni (II) Cu(II) and Hg(II) are prepared from the Schiff bases (L1,L2). (L1) derived from 4-aminoantipyrine and O-phenylene dia mine then (L2) derived from (L1) and 2-benzoyl benzoic acid. Structural features are obtained from their elemental microanalyses, molar conductance, IR, UV–Vis, 1H, 13CNMR spectra and magnetic susceptibility. The magnetic susceptibility and UV–Vis, IR spectral data of the ligand (L1) complexes get square–planar and tetrahedral geometries and the complexes oflig and (L2) get an octahedral geometry. Antimicrobial examinations show good results in the sharing complexes.

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