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    Prepared and characterization of new macrocyclic Schiff bases and their binuclear copper complexes
    (Pergamon-Elsevier Science Ltd, 2008) Temel, Hamdi; Ilhan, Salih
    The new five macrocyclic ligands were synthesized by reaction of 2,6-diaminopyridine and various dialdehydes. Then, their copper(II) perchlorate complexes were synthesized by template effect by reaction of 2,6-diaminopyridine, Cu(ClO4)(2 center dot)6H(2)O and aldehydes. The ligands and their complexes have been characterized by elemental analysis, IR, H-1 and C-13 NMR, UV-vis spectra, magnetic susceptibility, conductivity measurements, mass spectra. All complexes are diamagnetic and binuclear. The diamagnetic behaviour of the binuclear complexes may be explained by a very strong anti-ferromagnetic interaction in the Cu-Cu pair. (C) 2007 Elsevier B.V. All rights reserved.
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    Spectroscopic and electrochemical studies of transition metal complexes with N,N?-bis(2-aminothiophenol)-1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane and structure effects on extractability of ligand towards some divalent cations
    (Springer Wien, 2007) Temel, Hamdi; Alp, Hueseyin; Ilhan, Salih; Ziyadanogullari, Berrin; Yilmaz, Ismail
    La(III), Cu(II), Ni(II), and Zn(II) metal complexes with a novel quadridentate Schiff base derived from 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane and 2-aminothiophenol were synthesized and characterized by microanalytical data, elemental analysis, magnetic measurements, H-1 NMR, C-13 NMR, UV-Vis, IR, mass spectra, cyclic voltammetric and conductance measurements. The extractability of divalent cations was evaluated as a function of relationship between distribution ratio of the metal and pH or ligand concentration. The highest extraction percentage of Cu2+ and Ni2+ showed pH 7.0 and 6.4. It was concluded that the ligand can effectively be used in solvent extraction of copper(II) and nickel(II) from the aqueous phase to the organic phase.
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    Spectroscopic and extraction studies of new transition metal complexes with N,N'-bis(2-aminothiophenol)-1, 4-bis(2-carboxaldehydephenoxy)butane
    (Taylor & Francis Ltd, 2008) Temel, Hamdi; Alp, Hueseyin; Ilhan, Salih; Ziyadanogullari, Berrin
    Metal complexes of La(III), Cu(II) and Ni(II) with a thio Schiff base derived from 1,4-bis(2-carboxaldehydephenoxy)butane and 2-aminothiophenol have been synthesized in absolute ethanol and characterized by microanalytical data, magnetic measurements, H-1 NMR, C-13 NMR, UV-visible, IR-spectra, mass spectra and conductance measurements. The extractability of divalent cations was evaluated as a function of relationship between distribution ratios of the metal and pH or ligand concentration. The highest extraction percentage of Cu+2 and Ni+2 were at pH 7.0 and 6.4, respectively. The ligand can effectively be used in solvent extraction of copper(II) and nickel(II) from aqueous phase to organic phase.
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    Synthesis and characterization of a new macrocyclic Schiff base derived from 2,6-diaminopyridine and 1,10-bis(2-formylphenyl)-1,4,7,10-tetraoxadecane and its Cu(II), Ni(II), Pb(II), Co(III) and La(III) complexes
    (Springer, 2007) Ilhan, Salih; Temel, Hamdi
    A new macrocyclic ligand, 1,3,5-triaza-2,4:7,8:19,20-tribenzo-9,12,15,18-tetraoxacyclounkosa-1,5-diene (L) was synthesized by reaction of 2,6-diaminopyridine and 1,10-bis(2-formylphenyl)-1,4,7,10-tetraoxadecane. Then, its Cu-II, Ni-II, Pb-II, Co-III and La-III complexes were synthesized by the template effect by reaction of 2,6-diaminopyridine and 1,10-bis(2-formylphenyl)-1,4,7,10-tetraoxadecane and Cu(NO3)(2)center dot 3H(2)O, Ni(NO3)(2)center dot 6H(2)O, Pb(NO3)(2), Co(NO3)(2)center dot 6H(2)O, La(NO3)(3)center dot 6H(2)O respectively. The ligand and its metal complexes have been characterized by elemental analysis, IR, H-1 and C-13 NMR, u.v-vis spectra, magnetic susceptibility, conductivity measurements and mass spectra. All complexes are diamagnetic and the Cu-II complex is binuclear. The Co-III complex was oxidized to Co-III.
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    Synthesis and characterization of macrocyclic Cd(II) complexes
    (Natl Inst Science Communication-Niscair, 2008) Ilhan, Salih; Temel, Hamdi
    Ten new Cd(II) complexes have been synthesized with Cd(ClO4)(2)center dot 6H(2)O, Cd(NO3)(2)center dot 6H(2)O in chloroform-methanol. The complexes have been characterized by elemental analysis, IR, H-1 NMR, UV-vis spectra, magnetic susceptibility, conductivity measurements and mass spectra. On the basis of the spectral studies, four-coordinated tetrahedral geometry may be assigned to these complexes.
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    Synthesis and characterization of new macrocyclic Schiff base derived from 2,6-diaminopyridine and 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane and its Cu(II), Ni(II), Pb(II), Co(III) and La(III) complexes
    (Pergamon-Elsevier Science Ltd, 2007) Ilhan, Salih; Temel, Hamdi; Yilmaz, Ismail; Sekerci, Memet
    A new macrocyclic ligand, 1,3,5-triaza-2,4:7,8:16,17-tribenzo-9,12,15-trioxacyclooktadeca-1,5-dien (L) was synthesized by reaction of 2,6-diaminopyridine and 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane. Then, its Cu(II), Ni(II), Pb(II), Co(III) and La(III) complexes were synthesized by template effect by reaction of 2,6-diaminopyridine and 1,7-bis(2-formylphenyl)-1,4,7-trioxaheptane and Cu(NO3)(2) (.) 3H(2)O, Ni(NO3)(2).6H(2)O, Pb(NO3)(2), Co(NO3)(2) (.) 6H(2)O, La(NO3)(3) (.) 6H(2)O, respectively. The ligand and its metal complexes have been characterized by elemental analysis, IR, H-1 and C-13 NMR, UV-Vis spectra, magnetic susceptibility, thermal gravimetric analysis, conductivity measurements, mass spectra and cyclic voltarnmetry. All complexes are diamagnetic and Cu(II) complex is binuclear. The Co(II) was oxidized to Co(III). The comparative electrochemical studies show that the nickel complex exhibited a quasi-reversible one-electron reduction process while copper and cobalt complexes gave irreversible reduction processes in DMSO solution. (C) 2007 Elsevier Ltd. All rights reserved.
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    Synthesis and spectral characterization of macrocyclic NiII complexes derived from various diamines, NiII perchlorate and 1,4-bis(2-carboxyaldehydephenoxy)butane
    (Springer, 2007) Ilhan, Salih; Temel, Hamdi; Kilic, Ahmet; Tas, Esref
    Six new macrocyclic complexes were synthesized by reaction of 1,4-bis(2-carboxyaldehyde phenoxy)butane with various diamines. Then, their nickel(II) perchlorate complexes were synthesized by the template effect by reaction of 1,4-bis(2-carboxyaldehyde phenoxy)butane, Ni(ClO4)(2) center dot 6H(2)O and various diamines. The metal-to-ligand ratio of Ni-II metal complexes was found to be 1:1. The compounds are coordinated to the central metal as tetradentate O2N2 ligands The Ni-II complexes are proposed to exhibit tetrahedral geometry. Ni-II metal complexes are 1:2 electrolytes as shown by their molar conductivities (Lambda(M)) in DMF (dimethyl formamide) at 10(-3) M. The structure of Ni-II metal complexes is proposed from elemental analysis, f.t.-i.r., u.v.-vis., magnetic susceptibility measurements, molar conductivity measurements and mass spectra.
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    Synthesis and spectral characterization of macrocyclic Schiff base by reaction of 2,6-diaminopyridine and 1,4-bis(2-carboxyaldehydephenoxy)butane and its CuII, NiII, PbII, CoIII and LaIII complexes
    (Springer, 2007) Ilhan, Salih; Temel, Hamdi; Ziyadanogullari, Recep; Sekerci, Memet
    A new macrocyclic ligand, 1,3,5-triaza-2,4:7,8:15,16-tribenzo-9,15-dioxacycloheptadeca-1,5-diene (L) was synthesized by reaction of 2,6-diaminopyridine with 1,4-bis(2-carboxyaldehydephenoxy)butane. Then, its Cu-II, Ni-II, Pb-II,and Co-III and La-III complexes were synthesized by the template effect by reaction of 2,6-diaminopyridine and 1,4-bis(2-carboxyaldehydephenoxy)butane and Cu(NO3)(2)center dot 3H(2)O, Ni(NO3)(2) center dot 6H(2)O, Pb(NO3)(2), Co(NO3)(2) center dot 6H(2)O, La(NO3)(3) center dot 6H(2)O, respectively. The ligand and its metal complexes were characterized by elemental analysis, IR, H-1- and C-13-n.m.r., UV-vis spectra, magnetic susceptibility, thermal gravimetric analysis, conductivity measurements and mass spectra. All complexes are diamagnetic and the Cu-II complex is binuclear. The Co-II complex was oxidised to Co-III.
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    Synthesis and spectral studies of macrocyclic Cu(II) complexes by reaction of various diamines, copper(II) perchlorate and 1,4-bis(2-carboxyaldehyde phenoxy)butane
    (Taylor & Francis Ltd, 2008) Ilhan, Salih; Temel, Hamdi; Kilic, Ahmet
    Six macrocyclic complexes, were synthesized by reaction of 1,4-bis(2-carboxyaldehyde phenoxy)butane and various amines and their copper(II) perchlorate complexes were synthesized by template effect reaction of 1,4-bis(2-carboxyaldehyde phenoxy)butane, Cu(ClO4)2 center dot 6H(2)O and amines. The metal-to-ligand ratios were found to be 1 : 1. Cu(II) metal complexes are 1: 2 electrolytes as shown by their molar conductivities (Lambda(M)) in DM F (dimethyl formamide) at 10(-3) M. The Cu(II) complexes are proposed to be square planar based on elemental analysis, FT-IR, UV-Vis, magnetic susceptibility measurements, molar conductivity measurements, and mass spectra.
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    Synthesis and spectral studies of macrocyclic Cu(II), Ni(II) and Co(II) complexes by template reaction of 1,4-bis(3-aminopropoxy)butane with metal(II) nitrate and salicylaldehyde derivatives
    (Elsevier, 2008) Ilhan, Salih; Temel, Hamdi
    Six new macrocyclic complexes were synthesized by template reaction of salicylaldehyde derivatives with 1,4-bis(3-aminopropoxy)butane and metal(II) nitrate. The metal to ligand ratio of the complexes was found to be 1:1. The Cu(II) complexes are proposed to be square planar and the Ni(II) and Co(II) complexes are proposed to be tetrahedral geometry. Macrocyclic complexes are 1:2 electrolytes as shown by their molar conductivities (Am) in DMF (dimethylformamide) of 10(-3) M solution. The structure of metal complexes is proposed from elemental analysis, FIR, UV-vis, magnetic Susceptibility measurements, molar conductivity measurements and mass spectra. (c) 2008 Elsevier B.V. All rights reserved.
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    Synthesis and Spectral Studies of Macrocyclic Pb(II), Zn(II), Cd(II) and La(III) Complexes by Template Reaction of 1,2-Bis(2-formylphenyl)ethane with Metal Nitrate and Various Diamine
    (Maik Nauka/Interperiodica/Springer, 2010) Ilhan, Salih; Temel, Hamdi; Pasa, Salih; Tegin, Ibrahim
    Eight new macrocyclic complexes were synthesized by template reaction of 1,4-bis(3-aminopropoxy)butane or (+/-)-trans-1,2-diaminocyclohexane with metal nitrate and 1,2-bis(2-formylphenyl)ethane and their structures were proposed on the basis of elemental analysis, FT-IR, UV-Vis, molar conductivity measurements, H-1 NMR and mass spectra. The metals to ligand molar ratios of the complexes were found to be 1 : 1. The complexes are 1 : 2 electrolytes for Cd(II), Pb(II) and Zn(II) complexes and 1 : 3 electrolytes for La(III) as shown by their molar conductivities (Lambda(m)) in DMSO at 10(-3) mol L-1. Due to the existence of free ions in these complexes, such complexes are electrically conductive. The configurations of Cd(II) and Zn(II) complexes were proposed to probably tetrahedral, La(III) complexes are octahedral and Pb(II) complexes are octahedral geometry in the L-1 complex and tetrahedral geometry in the L-2 complex.
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    Synthesis and spectroscopic characterization of a new macrocyclic Schiff base formed by the reaction of 1,5-bis(2-formylphenyl)pentane and 2,6-diaminopyridine, and a study of its metal complexes
    (Taylor & Francis Ltd, 2009) Ilhan, Salih; Temel, Hamdi
    A new dialdehyde 1,5-bis(2-formylphenyl)pentane was synthesized from 1,5-dibromopentane with salicylaldehyde and K2CO3; macrocyclic ligand was synthesized by reaction of 2,6-diaminopyridine and 1,5-bis(2-formylphenyl) pentane. Cu(II), Ni(II), Pb(II), Zn(II), Cd(II) and La(III) complexes were synthesized by reaction of the ligand and Cu(ClO4)(2) center dot 6H(2)O, Ni(ClO4)(2) center dot 6H(2)O, Pb(ClO4)(2) center dot 6H(2)O, Zn(ClO4)(2) center dot 6H(2)O, Cd(ClO4)(2) center dot 6H(2)O and La(ClO4)(3) center dot 6H(2)O, respectively. The ligand and its metal complexes have been characterized by elemental analysis, IR, H-1 and C-13 NMR, UV-Vis spectra, magnetic susceptibility, conductivity measurements and mass spectra. All complexes are diamagnetic and Cu(II) complex is binuclear.
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    Synthesis and spectroscopic studies of novel transition metal complexes with schiff base synthesized from 1,4-bis-(o-aminophenoxy)butane and salicyldehyde
    (Maik Nauka/Interperiodica/Springer, 2009) Temel, Hamdi; Ilhan, Salih
    The new Co(II), Cu(II), Ni(II) and Zn(II) complexes of potentially N2O2 Schiff base ligand [N,N'-bis(salicyldehydene)-1,4-bis-(o-aminophenoxy)butane] (H2L) prepared from 1,4-bis-(o-aminophenoxy)butane and salicyldehyde in DMF. Microanalytical data, elemental analysis, magnetic measurements, H-l NMR, C-13 NMR, UV-visible and IR spectra as well as conductance measurements were used to confirm the structures. In all complexes, H2L behaves as a tetradentate.
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    Synthesis of complexes of Pb(II), Cd(II), Zn(II), Ni(II), La(III) and Cu(II) with a Schiff base macrocyclic ligand containing pyridine
    (Sage Publications Ltd, 2010) Ilhan, Salih; Temel, Hamdi
    1,5-bis(2-formylphenyl)pentane (synthesised from 1,5 dibromopentane and salicylaldehyde). reacts with 2,6-diaminopyridine to give a new macrocyclic ligand that gives Cu(II), Ni(II), Pb(II), Zn(II), Cd(II) and La(III) complexes by reaction with Cu(NO3)(2)center dot 3H(2)O, Ni(NO3)(2)center dot 6H(2)O, Pb(NO3)(2), Zn(NO3)(2)center dot 6H(2)O, Cd(NO3)(2)center dot 4H(2)O and La(NO3)(3)center dot 6H(2)O respectively. The ligand and its metal complexes have been characterised by elemental analysis, IR, H-1 and C-13 NMR, UV-Vis spectra, magnetic susceptibility, conductivity measurements and mass spectra. All complexes are diamagnetic and the Cu(II) complex is binuclear.
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    Synthesis, characterization and electro-spectroelectrochemical studies of four macrocyclic Schiff-base Co(II) complexes having N2O2 set of donor atoms
    (Springer, 2009) Yilmaz, Ismail; Ilhan, Salih; Temel, Hamdi; Kilic, Ahmet
    Four macrocyclic Schiff-base cobalt complexes, [CoL1][NO3](2) center dot A 3H(2)O, [CoL2][NO3](2) center dot A 4H(2)O, [CoL3][NO3](2) center dot A 4H(2)O and [CoL4][NO3](2) center dot A 2H(2)O, were synthesized by reaction of salicylaldehyde derivatives with 1,4-bis(3-aminopropoxy)butane or (+/-)-trans-1,2-diaminocyclohexane and Co(NO3)(2) center dot A 6H(2)O by template effect in methanol. The metals to ligand ratio of the complexes were found to be 1:1. The Co(II) complexes are proposed to be tetrahedral geometry. The macrocyclic Co(II) complexes are 1:2 electrolytes as shown by their molar conductivities (I >(M)) in DMF (dimethyl formamide) at 10(-3) M. The structure of Co(II) complexes is proposed from elemental analysis, Ft-IR, UV-visible spectra, magnetic susceptibility, molar conductivity measurements and mass spectra. Electrochemical and thin-layer spectroelectrochemical studies of the complexes were comparatively studied in the same experimental conditions. The electrochemical results revealed that all complexes displayed irreversible one reduction processes and their cathodic peak potential values (E (pc)) were observed in around of -1.14 to 0.95 V. It was also seen that [CoL1][NO3](2) center dot A 3H(2)O and [CoL2][NO3](2) center dot A 4H(2)O exhibited one cathodic wave without corresponding anodic wave but, [CoL3][NO3](2) center dot A 4H(2)O and [CoL4][NO3](2) center dot A 2H(2)O showed one cathodic wave with corresponding anodic wave, probably due to the presence of different ligand nature even if the complexes have the same N2O2 donor set. In view of spectroelectrochemical studies [CoL3][NO3](2) center dot A 4H(2)O showed distinctive spectral changes in which the intensity of the band (lambda A = at 316 nm, assigned to n -> pi* transitions) decreased and a new broad band in a low intensity about 391 nm appeared as a result of the reduction process based on the cobalt center in the complex.
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    Synthesis, characterization and redox properties of macrocyclic Schiff base by reaction of 2,6-diaminopyridine and 1,3-bis(2-carboxyaldehyde phenoxy) propane and its CuII, NiII, PbII, CoIII and LaIII complexes
    (Springer, 2007) Ilhan, Salih; Temel, Hamdi; Yilmaz, Ismail; Kilic, Ahmet
    A new macrocyclic ligand, 1,3,5-triaza-2,4:7,8:, 14,15-tribenzo-9,13-dioxacyclohexadeca-1,5-diene ( L) was synthesized by reaction of 2,6-diaminopyridine and 1,3-bis(2-carboxyaldehyde phenoxy) propane. Then, its Cu-II, Ni-II, Pb-II, Co-III and La-III complexes were synthesized by a template effect by reaction of 2,6-diaminopyridine and 1,3-bis (2-carboxyaldehyde phenoxy) propane and Cu(NO3)(2) center dot 3H(2)O, Ni(NO3)(2) center dot 6H(2)O, Co(NO3)(2) center dot 6H(2)O, La(NO3)(3) center dot 6H(2)O, respectively. The ligand and its metal complexes have been characterized by elemental analysis, IR, H-1- and C-13-NMR-, UV-vis spectra, magnetic susceptibility, conductivity measurements, mass spectra and cyclic voltammetry. All complexes are diamagnetic and the Cu-II complex is binuclear. The diamagnetic behaviour of the binuclear complex may be explained by a very strong anti-ferromagnetic interaction in the Cu-Cu pair. The Co-II was oxidised to Co-III.
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    Synthesis, spectroscopic and electrochemical studies of novel transition metal complexes with N,N?-bis(2-hydroxynaphthalin-1-carbaldehydene)-1,3-bis-(o-aminophenoxy)propane
    (Natl Inst Science Communication, 2007) Temel, Hamdi; Ilhan, Salih; Aslanoglu, Mehmet; Alp, Huseyin
    A novel Schiff base obtained by the reaction of 1,3-bis-(oaminophenoxy)propane and 2-hydroxynaphthalin-1-carbaldehyde, forms complexes with Co(II), Cu(II) and Ni(II). The Schiff base ligand and its metal complexes have been characterized by elemental analysis, microanalytical data, magnetic measurements, UV-visible, H-1 NMR, C-13 NMR and IR-spectra as well as conductance measurements. Electrochemical data show that NiL and CuL complexes undergo metal based quasi-reversible one-electron redox processes. However, metal complexes also exhibit ligand based irreversible redox waves. The electrochemical results also indicate that the electron transfer rate is higher for NiL complex than the CuL complex. Voltammetric data reveal easier electron donor properties for the NiL complex.
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    Synthesis, structural characterization and electrochemical studies of new macrocyclic Schiff base containing pyridine head and its metal complexes
    (Elsevier Science Sa, 2007) Ilhan, Salih; Temel, Hamdi; Yilmaz, Ismail; Sekerci, Memet
    A new macrocyclic ligand, 1,3,5-triaza-2,4:7,8:13,14-tribenzo-9,12-dioksa-cyclopentadeca-1,5-diene was synthesized by reaction of 2,6-diaminopyridine and 1,2-bis(2-carboxyaldehyde phenoxy)ethane. Then, its Cu(II), Ni(II), Pb(II), Co(III) and La(III) complexes were synthesized by the template effect by the reaction of 2,6-diaminopyridine and 1,2-bis(2-carboxyaldehyde phenoxy)ethane and Cu(NO3)(2)center dot 3H(2)O, Ni(NO3)(2)center dot 6H(2)O, Pb(NO3)(2), Co(NO3)(2)center dot 6H(2)O, La(NO3)(3)center dot 6H(2)O, respectively. The ligand and its metal complexes have been characterized by elemental analysis, IR, H-1 and C-13 NMR, UV-Vis spectra, magnetic susceptibility, thermal gravimetric analysis, conductivity measurements, mass spectra, and cyclic voltammetry. All complexes are diamagnetic and Cu(II) complex is binuclear. The Co(11) was oxidized to Co(111). The comparative electrochemical studies show that the nickel complex exhibited a quasi-reversible one-electron reduction process, while copper and cobalt complexes gave irreversible reduction processes in DMSO solution. (c) 2007 Elsevier B.V. All rights reserved.
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    Synthesis, structural characterization of new macrocyclic Schiff base derived from 1,6-bis(2-formylphenyl)hexane and 2,6-diaminopyridine and its metal complexes
    (Natl Inst Science Communication-Niscair, 2008) Ilhan, Salih; Ternel, Hamdi; Sunkur, Murat; Tegin, Ibrahim
    A macrocyclic ligand has been synthesized by reaction of 2,6-diaminopyridine and 1,6-bis(2-formylphenyl).hexane. Its complexes with Cu(II), Ni(II), Pb(II), Zn(II), Cd(II) and La(III) have been synthesized by the reaction of ligand and Cu(ClO4)(2)center dot 6H(2)O, Ni(ClO4)(2)center dot 6H(2)O, Pb(ClO4)(2)center dot 6H(2)O, Zn(ClO4)(2)center dot 6H(2)O, Cd(ClO4)(2)center dot 6H(2)O and La(ClO4)(3)center dot 6H(2)O, respectively. The ligand and its metal complexes have been characterized. All complexes are diamagnetic while the Cu(II) complex is binuclear.