Showing papers in "Synthesis and Reactivity in Inorganic and Metal-organic Chemistry in 2000"
TL;DR: Two new Schiff bases (1a)-(2a) derived from 2,3-diaminopyridine (DAPY) with pyrrole-2-carboxaldehyde (Pyrr) and 2-hydroxy-1-naphthaldehyde (NaphH) were synthesized by a combination of elemental analyses, magnetic susceptibility measurements, IR and NMR spectra as discussed by the authors.
Abstract: Two new Schiff bases (1a)-(2a) derived from 2,3-diaminopyridine (DAPY) with pyrrole-2-carboxaldehyde (Pyrr) and 2-hydroxy-1-naphthaldehyde (NaphH), and new copper(II), iron(III), nickel(II), ruthenium(II) and zinc(II) complexes (1b)-(1e), (2b)-(2f) and (3b)-(3d) derived from these two new Schiff bases, and the bis-condensed Schiff base of 2,3-diaminopyridine and salicylaldehyde (SalH) were synthesized. They were characterized by a combination of elemental analyses, magnetic susceptibility measurements, IR and NMR spectra. The two new Schiff bases and some of the metal complexes show antibacterial activity. The iron(III) and Ru(II) complexes display catalytic activity in the oxidation of alcohols in the presence of N-methylmorpholine-N-oxide as co-oxidant.
93 citations
TL;DR: In this paper, the synthesis and characterization of new coordination compounds of organotin(IV) with Schiffbases derived by condensation of heterocyclic ketones and amino acids is described.
Abstract: The present paper describes the syntheses, characterization of some new coordination compounds of organotin(IV) with Schiffbases derived by condensation of heterocyclic ketones and amino acids, viz. glycine, β-alanine, α-valine, α-isoleucine and α-tryptophan. The newely prepared compounds have been characterized by elemental analysis, conductance measurements, molecular weight determinations, infrared and nuclear magnatic resonance (1H, 13C and 119Sn NMR) spectral studies. An trigonal bipyramidal geometry has been proposed for all of the complexes. A few representative ligands and their tin complexes have also been screened for their antibacterial activities and found to be quite active in this respect.
38 citations
TL;DR: The unsymmetrical Schiff base 1′-hydroxy-2′-acetonaphthoneacetylacetone-ethylendiimine (Hhan)(Hacac)en and its complexes with some transition metals have been synthesized and characterized by elemental analyses, conductometric measurements, infrared and electronic absorption, NMR and mass spectroscopy.
Abstract: The unsymmetrical Schiff base 1′-hydroxy-2′-acetonaphthoneacetylacetone-ethylendiimine (Hhan)(Hacac)en and its complexes with some transition metals have been synthesized and characterized by elemental analyses, conductometric measurements, infrared and electronic absorption, NMR and mass spectroscopy.
36 citations
TL;DR: In this article, two new Shiff base ligands, N,N′-bis[2-hydroxy-3-methoxy-N-(p-methyl phenylene)benzylamine]-2,6-diacetylpyridinimine (H2L1) and H2L2, and their metal complexes have been prepared and characterized by elemental analyses.
Abstract: Two new Shiff base ligands, N,N′-bis[2-hydroxy-3-methoxy-N-(p-methyl phenylene)benzylamine]-2,6-diacetylpyridinimine (H2L1), N,N′-bis[2-hydroxy-3-methoxy-N-(p-methylphenylene)benzylamine]phtaldialdimine (H2L2) and their Cu(II), Co(III), Ni(II), Pd(II), VO(IV) and Zn(II) metal complexes have been prepared and characterized by elemental analyses, FT-IR, electronic spectra, magnetic moments, 1H and 13C NMR spectra, mass spectral and molar conductance data. The mononuclear Co(III) complexes of these ligands have diamagnetic character and octahedral geometry around the metal ion. The ketoimine-enolimine equilibria of the ligands were investigated by electronic spectra and showed that the ligands preferred the ketoimine form in nonpolar solvents. It has been found that the ligands and their complexes are non-electrolytic in nature. Spectral measurements showed that the ligands were coordinated to the metal ion through the azomethine nitrogen and phenolic oxygen atoms. The TG and DTA properties of the c...
36 citations
TL;DR: In this paper, 14 new complexes of several typical transition metal ions with two multidentate ligands have been synthesized and characterized by elemental analyses, molar conductance and magnetic susceptibility measurements as well as electronic, infrared and 1H NMR spectral studies and thermogravimetric studies.
Abstract: Fourteen new complexes of several typical transition metal ions with two multidentate ligands. thiosemicarbazones of N-methyl-and N-ethylacetoacetanilide, have been synthesized. These complexes have the general formulae [MX3], [MY2], [MY], [MZ(H2O)3], [MZ(OH)(H2O)]2 or [MZ(H2O)], where M = Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Hg(II) or Ag(I) and X = bidentate monoanion, Y = tridentate monoanion and Z = tridentate dianion of the ligands. They have been characterized by elemental analyses, molar conductance and magnetic susceptibility measurements as well as electronic, infrared and 1H NMR spectral studies and thermogravimetric studies.
36 citations
TL;DR: In this article, three potentially tetradentate ligands are formed by the 1:2 molar condensation of ℴ-phenylenediamine with salicylaldehyde, 2-hydroxy-l-naphthaldehyde, or 2 -hydroxyacetophenone.
Abstract: Three ligands have been formed by the 1:2 molar condensation of ℴ-phenylenediamine with salicylaldehyde, 2-hydroxy-l-naphthaldehyde or ℴ-hydroxyacetophenone. The potentially tetradentate ligands are N,N-bis-(salicylaldehyde)-ℴ-phenylenediamine (SalophH2), N,N-bis(2-hydroxy-1-naphthalde-hyde)-ℴ-phenyIenediamine (NophH2) and N,N-bis(ℴ-hydroxyacetophenone)-ℴ-phenylenediamine (AophH2), respectively. These ligands form 1:1 complexes with nickel, copper and zinc ions. The complexes have been characterized by IR, 1H NMR, MS, UV/Vis spectra in addition to elemental analyses. The spectral data of the ligands and their complexes are discussed in connection with the structural changes which occur due to complexation.
33 citations
TL;DR: In this article, the half-unit Schiff base, N-(2-hydroxyacetophenone)-l-amino-2-phenyleneimine (HL1), was used for the synthesis of some non-symmetrical tetradentate di-Schiff base complexes of Ni(II) and Cu(II), which were characterized by elemental analyses, IR, electronic absorption spectra and molar conductance.
Abstract: The “half-unit” Schiff base, N-(2-hydroxyacetophenone)-l-amino-2-phenyleneimine (HL1), was used for the synthesis of some non-symmetrical tetradentate di-Schiff base complexes of Ni(II) and Cu(II). These complexes were characterized by elemental analyses, IR, electronic absorption spectra and molar conductance. 1H and 13C NMR spectra were obtained for the ligands HL1, H2L2 and H2L3. 1H NMR spectra suggest that the ligands in the Ni(II) complexes coordinate through the nitrogen atoms of the azomethine groups and the oxygen atoms of the phenolic (C-OH) groups.
32 citations
TL;DR: In this article, the Iigand field parameters (B, Dq, β) for the Fe(III), Co(II), Ni(II) and Ag(I) complexes were calculated and related to the electronic environments.
Abstract: Mononuclear and polynuclear chelates of nicotinoyldithiocarbazate (HNDC−) with Fe(III), Mn(II), Fe(II), Co(II), Ni(II), Zn(II), Cd(II), Hg(II), Pd(II), Cu(I) and Ag(I) have been prepared. The chelates have been characterized by chemical and thermal (TG, DTG, DTA) analyses, molar conductivity, spectral (UV-Visible, IR, NMR) and magnetic susceptibility measurements. The molar conductivities of the complexes lie in the non-electrolyte range whilst KHNDC is a 1:1 electrolyte. The IR spectral data show that KHNDC behaves in a monoanionic bidentate or tetradentate and dianionic tetradentate manner. The Iigand field parameters (B, Dq, β) for the Fe(III), Co(II) and Ni(II) complexes were calculated and related to the electronic environments. The solid metal acetate complexes have a unique decomposition exotherm profile which can be used as a rapid and sensitive tool for the detection of acetate-containing complexes.
28 citations
TL;DR: In this article, the authors used infrared, multinuclear NMR, mass and Mossbauer spectral techniques to characterize new organotin compounds of 2-(2,6-dichlorophenyl)aminophenyl-acetic acid anion with the general formulae R3SnL, R2SnL2 and R2sn(Cl)L, where R = CH3, C4H9, C6H5, C 6H5 and C 6h5CH2 and L = 2.
Abstract: Infrared, multinuclear NMR, mass and Mossbauer spectral techniques have been used to characterize new organotin compounds of 2-(2,6-dichlorophenyl)aminophenyl-acetic acid anion with the general formulae R3SnL, R2SnL2 and R2Sn(Cl)L where R = CH3, C4H9, C6H5, C6H5CH2 and L = 2-(2,6-dichlorophenyl)-aminophenylacetic acid anion. These techniques were used to compare the geometry of these compounds as solids and in solution. Antibacterial and antifungal activities were determined in order to study their biological significance.
28 citations
TL;DR: Several new hexa-coordinated ruthenium(III) complexes of the type [RuX2(EPh3)2(L)] (X = CI, Br; E = P, As; LH = o-vanillidene-o-toluidine, O-vanilla-m-toline, and o-villidane-p-tocuidine) have been prepared by reacting with Schiff bases derived from the condensation of ovanillin with aniline, o-toiletine, m-t
Abstract: Several new hexa-coordinated ruthenium(III) complexes of the type [RuX2(EPh3)2(L)] (X = CI, Br; E = P, As; LH = o-vanillideneaniline, o-vanillidene-o-toluidine, o-vanillidene-m-toluidine and o-vanillidene-p-toluidine) have been prepared by reacting [RuX3(EPh3)3] or [RuBr3(EPh3)2(MeOH)] (X = CI, Br; E = P, As) with Schiff bases derived from the condensation of o-vanillin with aniline, o-toluidine, m-toluidine or p-toluidine in benzene in the presence of triethylamine. In all of the reactions the Schiff bases behave as monobasic bidentate ligands. The new complexes have been characterised on the basis of elemental analyses, spectral (IR, electronic, EPR) and cyclic voltammetric studies. An octahedral structure has been tentatively proposed for all of the new complexes. The Schiff bases and the new complexes have been tested in vitro against the pathogenic fungi Aspergillus niger and Fusarium Sp.
25 citations
TL;DR: In this article, the zinc complexes of acetophenone benzoyl hydrazone and 4-hydroxyacetophenone acylhydrazones of benzoic, isonicotinic, salicylic, 4-aminobenzoic acid hydrazides and oxalic, malonic and succinic acid dihyrazides were synthesized.
Abstract: Zinc(II) complexes of the types [Zn(L)nCl2(H2O)2] and [Zn(L)nCl2]H2O [n = 1 or 2, m = 1,2 and 4 and L = acetophenone or 4-hydroxyacetophenone acylhydrazones of benzoic, isonicotinic, salicylic and 4-aminobenzoic acid hydrazides and oxalic, malonic and succinic acid dihyrazides] were synthesized and characterized by elemental analyses, dehydration studies, molar conductance, infrared. NMR and electronic spectral data and powder X-ray diffraction studies. The ligands coordinate through >C[dbnd]O and >C[dbnd]N groups to the metal ions. The water molecules are in the coordination sphere in case of the 1:1 (metaUigand) complexes and the hydrazones from the dihydrazides act as quadridentate ligands bonding through the >C[dbnd]O and >C[dbnd]N groups. The zinc complexes of acetophenone benzoyl hydrazone and acetophenone oxaloyl dihydrazone, [ZnL2Cl2·H2O, cryastallize in an orthorhombic unit lattice.
TL;DR: In this article, the properties of 1-phenylacetyl-4-phenylon-3-thiosemicarbazide (H2PAPTS) complexes were characterized on the basis of chemical, thermal (TG, DTA) analyses, spectral (IR, 1H NMR, UV-Vis.), magnetic moment and molar conductivity measurements.
Abstract: Complexes of 1-phenylacetyl-4-phenyl-3-thiosemicarbazide (H2PAPTS) with Mn(II), Fe(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Pd(II), Cd(II) and Hg(II) have been prepared and characterized on the basis of chemical, thermal (TG, DTA) analyses, spectral (IR, 1H NMR, UV-Vis.), magnetic moment and molar conductivity measurements. IR and 1H NMR spectral data show that H2PAPTS behaves as a neutral bidentate, mononegative bidentate or binegative tetradentate ligand. All the reported complexes are non-electrolytes and different stereochemistries are proposed for the Mn(II), Fe(II), Fe(III), Co(II), Ni(II), Cu(II) and Pd(II) complexes according to their magnetic and spectral measurements. The thermal decomposition of the complexes (Co(HPAPTS)(OAc)] and [Cd(HPAPTS)(OAc)(H2O)2] suggests a mechanism for their degradation. The [Fe(PAPTS)Cl(H20)] complex was found to function as a one-electron stoichiometric oxidant towards primary and secondary alcohols.
TL;DR: The 3D transition metal complexes of isonicotinoyl hydrazone derived from isoniazid with l-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) have been synthesized and characterized on the basis of elemental analyses, IR UV spectra and thermal analyses.
Abstract: The 3d transition metal complexes of isonicotinoyl hydrazone derived from isoniazid with l-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) have been synthesized and characterized on the basis of elemental analyses, IR UV spectra and thermal analyses. The general formula of the complexes is ML nH2O (where M(II) = Cr, Mn, Fe, Co, Ni and Cu, n = 0, 1). It has been discovered that the complexes possess certain scavenger effects on O2 − radicals.
TL;DR: In this article, salicylaldehyde-2-furoylhydrazone (H2L) and its complexes with Mn(II), Co (II), Ni(II, Cu(II) and Zn(II)) have been synthesized and characterized by elemental analyses, magnetic susceptibility measurements, molar conductance, IR, 1H NMR, electronic and EPR spectra and thermal analyses.
Abstract: A novel ligand, salicylaldehyde-2-furoylhydrazone (H2L) and its complexes with Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) have been synthesized and characterized by elemental analyses, magnetic susceptibility measurements, molar conductance, IR, 1H NMR, electronic and EPR spectra and thermal analyses. The spectral data show that the ligand (H2L) acts as a dibasic tridentate ligand towards the metal cations. The magnetic and spectral data indicate that the complexes of the type [ML·3H2O] (where M = Mn (II), Co(II) or Zn(II)) are octahedral while those of the type [ML·H2O] (where M = Ni(II) or Cu(II)) are square-planar.
TL;DR: The Schiff base N-salicylidene-O.S-dimethylthiophosphorylimine (HSMa) and its complexes with copper(II), zinc(II, and nickel(II) have been synthesized.
Abstract: The Schiff base N-salicylidene-O.S-dimethylthiophosphorylimine (HSMa) and its complexes with copper(II), zinc(II) and nickel(II) have been synthesized. All new compounds have been characterized by elemental analyses, conductivity measurements, infrared and electronic spectra. 1H NMR, 31P NMR and MS have also been used to identify the Schiff base. It has been found that the Schiff base behaves as a bidentate ligand in coordination with the metal ions through its imino nitrogen and phenolic oxygen in the expected mode. Preliminary results of insecticidal activity tests show that all of the synthesized compounds have much higher pesticidal rates on poisoning Aphis fabae and Metatetranychus ulmi, compared with methamidophos (Ma), a commercial pesticide, which is one of the starting materials for the preparation of the Schiff base in this work (Fig. 1).
TL;DR: In this paper, molecular structures of N,N′-bis(salicylidene)-1,3-diaminopropane, an ONNO type ligand, with ZnX2 (X = AcO−, NO3-, Cl−, Br−, I−) salts were prepared using elemental analyses, IR spectrometry and X-ray diffraction techniques.
Abstract: Complexes of N,N′-bis(salicylidene)-1,3-diaminopropane, an ONNO type ligand, with ZnX2 (X = AcO−, NO3-, Cl−, Br−, I−) salts were prepared. Molecular structures of these complexes were identified using elemental analyses, IR spectrometry and X-ray diffraction techniques. It has been observed that the reactions between zinc ions and the said ligand tend to produce polynuclear complexes and depending on the anion present either di- or trinuclear complexes are formed. Thus, it can be deduced from the results presented in this article that trinuclear complexes form when the zinc salt used was the acetate or nitrate and dinuclear complexes form if the anion in the zinc salt is a halogen.
TL;DR: In this article, the synthesis and characterization of 6-arene-Ru(R3P)Cl2 and l-phenyl-3,4-dimethylphosphole (DMPP) complexes are described.
Abstract: The synthesis and characterization of the complexes: [(η6-arene)Ru(R3P)Cl2], [(arene = C6H6, MeC6H5, p-MeC6H4, CHMe2, and C6Me6; R3P = Ph2,PCH[dbnd]CH2 (DPVP); PhP(CH[dbnd]CH2)2 (DVPP), Ph2PCH2CH[dbnd]CH2 (ADPP); and l-phenyl-3,4-dimethylphosphole (DMPP)] are described. These complexes have been characterized by elemental analyses, physical properties, 1H, 13C{1H}, and 31P{1H} NMR spectroscopy, infrared spectroscopy, cyclic voltammetry and in most cases by-X-ray crystallography.
TL;DR: In this paper, a series of Cu(II), Ni(II) and Co(II)-complexes with N,N′-bis-[5-X-salicylidene]-2,2′-diaminodibenzyl [H2-XSalDDB (X[dbnd]H, CH3, Br)] have been prepared.
Abstract: A series of Cu(II), Ni(II) and Co(II) complexes with N,N′-bis-[5-X-salicylidene]-2,2′-diaminodibenzyl [H2-XSalDDB (X[dbnd]H, CH3, Br)] have been prepared. The metal complexes were characterized on the basis of elemental analyses, electrical conductance, magnetic susceptibility, spectral and thermal studies. All of the complexes are non-electrolytes of 1:1 (M:L) stoichiometry. The room temperature magnetic susceptibility and electronic spectral data support a pseudo-tetrahedral geometry for the complexes. The IR spectra show that the Schiff bases function as tetradentate ligands coordinating through the ON-NO donor system. Substitution on the phenyl ring of the complexes produces a shift in the azomethine v(C[dbnd]N) stretching vibrational frequency which is related to Hammett's substituent parameter [sgrave]. The 1H NMR data reveal that all Schiff bases exist in the enol-iminic form. Various ESR parameters for the copper complexes have been calculated. The thermal curves of the chelates are singl...
TL;DR: In this article, six new complexes of the light Ianthanide elements La, Ce, Pr, Nd, Sm and Eu with Schiff base ligands derived from salicylaldehyde and glycine have been synthesized and characterized by elemental analyses, molar electrical conductivities, magnetic moments, infrared and electronic spectra, and thermogravimetric analyses.
Abstract: Six new complexes of the light Ianthanide elements La, Ce, Pr, Nd, Sm and Eu with Schiff base ligands derived from salicylaldehyde and glycine have been synthesized and characterized by elemental analyses, molar electrical conductivities, magnetic moments, infrared and electronic spectra, and thermogravimetric analyses. All of the complexes were found to be non-electrolytes of the general empirical formula Ln(L)(HL)nH2O, where H2L is the glycine Schiff base ligand and n is 3 or 3. 5.
TL;DR: In this article, a series of mononuclear VO(IV), Co(II), and Cd(II) complexes of the formula [HLVO(OH2)]·nH2O, [HLCo]·x H2O and binuclear Fc(III) complexes were synthesized.
Abstract: New series of mononuclear VO(IV), Co(II) and Cd(II) complexes of the formula [HLVO(OH2)]·nH2O, [HLCo]·xH2O and [HLCd]·xH2O and binuclear Fc(III) complexes of the formula [LFe2Cl2(H2O)3]Cl·H2O have been synthesized. L stands for one of the five asymmetrical pentadentate (N2O3) Schiff base ligands H3L1-H3L5 prepared by the condensation of acetoacetylphenol and ethylenediamine in the molar ratio 1:1 to prepare a half-unit Schiff base which is further condensed with one of the following aldehydes and ketones: ℴ-hydroxyacetohpenone, salicylaldehyde. naphthaldehyde, benzoylacetone or acetylacctone. These ligands possess two dissimilar coordination sites, an inner, four-coordinating N2O2 donor set and an outer, three-coordinating O2O set. The complexes were characterized by IR. electronic, ESR and mass spectra as well as conductivity and magnetic measurements. The magnetic moments of the VO(IV) complexes at room temperature are higher than expected for a single electron due to orbital contributions. whi...
TL;DR: In this paper, the Ni(II) complexes of the Schiff bases 1,2-di(imino-4′-antipyrinyl)ethane (GA) and 4-N-(4′ -antipyrylmethylidene)aminoantipyline (AA) have been characterized by elemental analyses, electrical conductance in nonaqueous solvents, infrared and electronic spectra as well as magnetic susceptibility measurements.
Abstract: Nickel(II) complexes of the Schiff bases 1,2-di(imino-4′-antipyrinyl)ethane (GA) and 4-N-(4′-antipyrylmethylidene)aminoantipyrine (AA) having the compositions [Ni(GA)]X2 and [Ni(AA)2]X2 (where X - ClO4, NO3, Cl, Br or I) have been prepared and characterized by elemental analyses, electrical conductance in non-aqueous solvents, infrared and electronic spectra as well as magnetic susceptibility measurements. GA acts as a neutral tetradentate ligand coordinating through both carbonyl oxygens and both azomethine nitrogens while AA acts as a neutral bidentate ligand coordinating through one of the carbonyl oxygens and the azomethine nitrogen. In all these complexes both the anions are not coordinated resulting in a square planar geometry around the Ni(II) ion in complexes of GA and a tetrahedral geometry in complexes of AA.
TL;DR: Chiral mixed-ligand (CML) metal complexes of the type M(INPP)L′H2O where M is Co(II), HINPP = isonitrosopropiophenone, and HL′ = chiral amino acid have been synthesized.
Abstract: Chiral mixed-ligand (CML) metal complexes of the type M(INPP)L′H2O where M is Co(II), HINPP = isonitrosopropiophenone, and HL′ = chiral amino acid, such as L-alanine, L-phenylalanine, L-leucine, L-methionine and L-valine, have been synthesized The same CML Co(II) complexes could also be synthesized from racemic amino acids using Co(II) : HINPP : racemic amino acids in 1 : 1 : 2 proportion by in situ stereoselective complexation The complexes have been characterised by various physico-chemical techniques The electrical conductance studies of the complexes in nitrobenzene solution at 10−3 M concentration indicate their non-electrolytic nature Electronic absorption/reflectance spectra of the complexes show intra-ligand, charge transfer and crystal field transitions Room temperature magnetic susceptibility measurements of these complexes, except Co(INPP)(Meth) H2O (where Meth = deprotonatated methionine), are indicative of a distorted octahedral geometry with some antiferromagnetic interaction
TL;DR: Several new organosilicon(IV) complexes of the type Me3Si(L/L′) have been synthesized and characterized by elemental analyses, molar conductance, electronic, infrared and multi-nuclear magnetic resonance (1H and 13C) studies as discussed by the authors.
Abstract: Several new organosilicon(IV) complexes of the type Me3Si(L/L′) [where L/L′ = anions of the Schiff bases derived from the condensation of 2-methoxyben-zaldehyde (HL) or acetophenone (HL′) with glycine (HL-1/HL′-l), L-leucine (HL-2/HL′-2), L-methionine (HL-3/ HL′-3), DL-α-alanine (HL-4/HL′-4) and L-valine (HL-5/HL′-5)] have been synthesized and characterized by elemental analyses, molar conductance, electronic, infrared and multi-nuclear magnetic resonance (1H and 13C) studies. All the complexes are non-electrolytes. A penta-coordinate, trigonal-bipyramidal geometry is suggested for all of the complexes. The in vitro antimicrobial activity of the trimethyl- and triphenylsilicon(IV) complexes has also been screened against bacteria (E. coli, Rhizobium meliloti, Aeromonas formicans, Pseudomonas putida. Staphyllococcus aureus) and fungi (Penicillium notatum. Verticllium dahliae, Aureobasidium pullulans and Aspergillus niger), and the complexes were found to be active in this respect.
TL;DR: In this paper, the reaction of metal chlorides with 2-hyuroxy-1 -naphthylidene-oaminophenol (H2SB1) or 2-hydroxy-1-naphthyroid-anthranilic acid (H 2SB2) in I : I molar ratio and further reaction with 2,2′-bipyridylamine in alcohol yields mixed-ligand complexes.
Abstract: The reaction of metal chlorides with 2-hyuroxy-1 -naphthylidene-o-aminophenol (H2SB1) or 2-hydroxy-1-naphthylideneanthranilic acid (H2SB2) in I : I molar ratio and further reaction with 2,2′-bipyridylamine in alcohol yields mixed-ligand complexes. All of these complexes are soluble in ethanol, methanol and dimethyl formamide. They were characterized on the basis of elemental analyses, magnetic measurements, infrared spectra, electronic spectra, thermogravimetric analyses. Biocidal studies have also been undertaken.
TL;DR: Two cationic mixed-ligand complexes, [Co(L)cyc]NO3 C2H5OH (A) and [Co2(L),tpmc](CJO4)2 CH3CN (B), were prepared in this article.
Abstract: Two cationic mixed-ligand complexes, [Co(L)cyc]NO3 C2H5OH (A) and [Co2(L)tpmc](CJO4)2 CH3CN (B), were prepared, where eye = 1, 4, 8, 11-tetraaza-cyclotetradecane, tpmc = N, N′, N″, N′″-tetrakis(2-pyridylmethyl)-1, 4, 8, 11-tetraaza-cyclotetradecane and L = bicyclo[2. 2. 1]-hept-5-en-endo-2, 3-cis-dicarboxylate dianion. The complexes were characterized by elemental analyses, ion-exchange chromatography, magnetic moments, conductance measurements, IR, 13C NMR and UV/VIS spectroscopy and cyclic voltammetry. It is suggested that the complexes A and B have octahedral structures with endobidentate or exo-(bis)-bidentate coordination of L.
TL;DR: Complexes of Y(III), La(III, Pr(III) with salicylaldehyde benzoyl hydrazone, C6H5CONHN[dbnd]CHC6H4OH, abbreviated as H2L, have been synthesized.
Abstract: Complexes of Y(III), La(III), Pr(III), Nd(III), Sm(III), Gd(III), Tb(III) and Dy(III) with salicylaldehyde benzoyl hydrazone, (C6H5CONHN[dbnd]CHC6H4OH), abbreviated as H2L, have been synthesized an...
TL;DR: The characterization of these newly synthesized mixed-ligand complexes were done by elemental analyses, magnetic measurements, infrared spectra, diffuse reflectance spectra and thermogravimetric analyses.
Abstract: New mixed-ligand complexes of the transition metal ions Co(II), Ni(II), Cu(II) and Zn(II) with 2,2′-bipyridylamine and 3,5-dibromosalicylaldehyde or 2-hydroxyacetophenone or 2-hydroxy-1-naphthaldehyde have been synthesized The characterization of these newly synthesized mixed-ligand complexes were done by elemental analyses, magnetic measurements, infrared spectra, diffuse reflectance spectra and thermogravimetric analyses
TL;DR: In this paper, the 2-hydroxy-l-napthaldehyde thiosemicarbazone with the transition metals Cu, Pd and Ru were prepared and the physical, analytical and biological data of these complexes were reported.
Abstract: The complexes of 2-hydroxy-l-napthaldehyde thiosemicarbazone with the transition metals Cu, Pd and Ru were prepared and the physical, analytical and biological data of these complexes are reported.
TL;DR: In this paper, the yic-dioxime ligand (Z, Z)-1, 2-dihydroxyimino-3, 6-diamino-8, 9-O, O-cyIopentylidenenonane-8 and 9-dioI (LH2) was synthesized by treating 1, 3diaminino-5, 6dioximes with anti-chloro-glyoxime in the presence of a base, e.g. triethylaminc.
Abstract: The new yic-dioxime ligand, (Z, Z)-1, 2-dihydroxyimino-3, 6-diamino-8, 9-O, O-cyIopentylidenenonane-8, 9-dioI (LH2) was synthesized by treating 1, 3-diamino-5, 6-O, O-cylopenlylidenehexane-5, 6-diol (R-NH2) with anti-chloro-glyoxime in the presence of a base, e. g. triethylaminc. vic-Dioximes have been found to be in the Z, Z-form according to 1H NMR and 13C NMR data. Mononuclcar complexes having ametal-ligand ratio of 1:2 have been prepared with Co(II), Cu(II) and Ni(II) salts. However, the metal-ligand ratio and structure of the UO2(VI) complex was found to be 1:1 and dinuclear. The ligand and its complexes were characterized by magnetic susseptibility, elemental analyses, IR, UV-Vis., 1H NMR, 13C NMR, TGA and DTA studies. Structures for the complexes are suggested.
TL;DR: The most probable stereochemistry of the polymeric compounds has been ascribed on the basis of the available spectral and thermal data as discussed by the authors, based on the available IR data augmenting the bridging behaviour of both the hydrazine and the long chain dicarboxylate dianion except in the case of the cadmium pimelate compound.
Abstract: Metal hydrazine dicarboxylates of cobalt, nickel, zinc and cadmium with pimelic, suberic, azelaic and sebacic acids have been prepared and characterised by analytical, spectral, thermal and X-ray powder diffraction studies. IR data augment the bridging behaviour of both the hydrazine and the long chain dicarboxylate dianion except in the case of the cadmium pimelate compound. The most probable stereochemistry of the polymeric compounds has been ascribed on the basis of the available spectral and thermal data. Almost all of the complexes decompose to give its metal oxide through their metal dicarboxylate intermediates. The dihydrazine complexes of the metals with their respective anions are isomorphous among themselves.