Veronica Paredes

• PhD in Chemistry
• Academic at Andrés Bello University

We have prepared and structurally characterized pivalate based {CrIII4LnIII2} complexes with Ln = Dy and Gd as well as the Y analogue, with the overall formula [CrIII4LnIII2(mdea)2(piv)10(OH)4], Ln = Gd, Dy and Y. We are reporting a detailed experimental magnetic properties study, including magnetization relaxation dynamics and calorimetric data, s...

Core–shell micro/nanomotors have garnered significant interest in biomedicine owing to their versatile task-performing capabilities. However, their effectiveness for photothermal therapy (PTT) still faces challenges because of their poor tumor accumulation, lower light-to-heat conversion, and due to the limited penetration of near-infrared (NIR) li...

A new trinuclear CuII compound {[Cu3(HL′)2(H2O)2](ClO4)4}·(H2O)4 (1) was obtained and presented a trapped chiral hemiaminal (HL2′ = [(5-amino-4H-1,2,4-triazol-3-yl)amino](1H-imidazol-4-yl)methanol)). Compound 1 shows an almost flat cationic structure [Cu3(HL′)2(H2O)2]4+ with a Cu3 linear core reached by the double Cu-OR/NN-Cu triazole/alkoxo bridge...

The synthesis and structural characterization of a new triangular Cu 3-µ 3 OH pyrazolato complex of formula, [Cu 3 (µ 3 −OH)(pz) 3 (Hpz) 3 ][BF 4 ] 2 (1−Cu 3), Hpz = pyrazole, is presented. The triangular unit forms a quasi-isosceles triangle with Cu-Cu distances of 3.3739(9), 3.3571(9), and 3.370(1) Å. This complex is isostructural to the hexanucl...

We report the synthesis, structural characterization and SMM behaviour of a new mixed valence Co(II)/Co(III) dinuclear complex bearing the H2pmide ligand. Well defined molecule pairs are observed in the crystal structure, bound through H-bond interactions directed by aqua ligands. From DC magnetometry data, a spin-only Hamiltonian approach includin...

Rare earth elements (REEs) are among the most important raw materials in developing new high-tech devices. There are many ways to recover REE ions from diverse sources. A new emerging sustainable technology is Magnetic Nanohydrometallurgy (MNHM). It combines nanotechnology with the hydrometallurgy process as the adsorption. It is one of the most pr...

Hydrogenation of nitroarenes has attracted renewed attention since it was discovered that non‐noble metal catalysts could selectively reduce nitroarenes with sensitive reducible groups. Here, we report the results of the chemoselective catalytic hydrogenation of nitroarenes with unsupported Ni NPs. Initial catalytic assessments showed high activity...

We have successfully prepared and structurally characterized triangle-in-triangle {Cr3Ln3} complexes with Ln = Gd and Dy employing alcohol-amine, N-methyldiethanolamine (H2mdea) and pivalate ligands. These complexes and the Yttrium analogue proved to be isostructural and crystallized in a P1 triclinic cell. DC and AC magnetic measurements were carr...

Novel heterometallic three-dimensional coordination polymers {[CuII2LnIIICl2(HIA)4(NO3)(DMF)2]∙(2DMF)∙(H2O)}n based on Ce (1), Eu (2) or Gd (3) and imidazole-4-acrylic acid (H2IA), were successfully synthesized using the sonochemical method. All attempts to obtain the compound using other synthetic methods were unsuccessful. The heterometallic poly...

We are reporting the synthesis and structural characterization of a new hexanuclear Co(ii)/Co(iii) complex starting from a versatile pivalate cobalt precursor and the racemic mixture of a chelating Schiff base type ligand. The main [CoII4CoIII2(μ3-OH)2(μ-OR)2(μ-OR')2(μ-OR'')2]6+ core is unprecedented and exhibits an inversion center that affords on...

Cobalt (Co) is one of the most promising materials in nanotechnology due to its superior magnetic properties. However, due to the high cytotoxicity of cobalt, the activity in biological systems has been little studied. In this work, we report the structural, morphological, and magnetic properties of cobalt nanoparticles stabilized with an organic l...

In this work, we report a new octanuclear cluster based on FeIII and the ligand 1H-imidazole-4,5-dicarboxylic acid, [Et3NH]12[Fe8(IDC)12]·10DMF·13H2O (1), with a metal core containing eight FeIII connected by only one type of organic ligand. A peak at 573 m/z in the mass spectra of the compound suggests the adduct species {[Fe8(IDC)12]+8H}4–. By X-...

A new paddlewheel dinuclear CuII complex [Cu2(HL)4(MeOH)2](MeOH)4, Cu2-PW was obtained using the 3,5-di-tert-butyl-salicylic acid as a ligand (H2L). The Cu2-PW crystallizes in the monoclinic P2/c space group having a Cu…Cu distance of 2.5727(17) Å. The hydrogen bonds between coordinated and solvate methanol molecules link the structure into a pseud...

New insights in the electronic properties of mixed-valence polyoxovanadoborate clusters.

In the present work we report two new CuI/CuII-GdIII mixed valence heterometallic coordination polymers (HCP), [Gd(H2O)4CuIICuI(IDC)2] (1) and [Gd2(H2O)2(C2O4)2CuII(IDC)2CuI2(4,4'-bipy)]·4.5H2O (2) obtained under solvothermal synthesis using 1H-imidazole-4,5-dicarboxylic acid (H3IDC) as principal N,O-bifunctional organic linker. In both compounds,...

Mixed-valence polyoxovanadates (POV) constitute a family of polyoxometalates whose electronic properties are still unclear. Polyoxovanadoborates (POVB) a subfamily of POV, show different electronic and magnetic properties respect of those from the POV. On the interpretation of the electronic spectra of these compounds only three bands in the 350 to...

Two new aromatic organo-imido polyoxometalates with an electron donor triazole group ([n-Bu4N]2[Mo6O18NC6H4N3C2H2]) (1) and a highly conjugated fluorene ([n-Bu4N]2[Mo6O18NC13H9]) (2) have been obtained. The electrochemical and spectroscopic properties of several organo-imido systems were studied. These properties were analysed by the theoretical st...

In the present work, we report the synthesis and characterization of two new heterometallic coordination polymers based on CeIII and containing CoII or CuII cations, assembled by the bifunctional ligand 1H-imidazole-4,5-dicarboxylic acid, [Ce(H2O)2(HIDC)Co(IDC)]·H2O CoCe and [Ce(H2O)2(H2IDC)Cu(H2O)(IDC)Cu0.2(H1.6IDC)] CuCe. Compound CoCe was obtain...

Three EuIII macrocyclic complexes [EuLⁿH2(NO3)3](H2O)x based on the ligands derived from 2-hydroxy-5-methyl-1,3-benzenedicarbaldehyde and three different amines: o-phenylenediamine, Eu-OPDA; ethylenediamine, Eu-EDA; and 1,3-diaminopropane, Eu-DAP have been synthesized via a metal template reaction. Eu-EDA and Eu-DAP showed metal based emission; for...

In this work the magnetic properties of bimetallic phases M'0.2Mn0.8PS3 • 0.25H2O (M' = Co II , Ni II , Cu II or Zn II) have been explored and compared with those of the pristine phase MnPS3. Magnetic susceptibility, high field magnetization and electron paramagnetic resonance (EPR) studies reveal that the transition temperature between the antifer...

The catalytic performance of the novel framework {[Cu3Lu2(ODA)6(H2O)6]•10H2O}n was tested on the oxidation of alkenes and benzylic hydrocarbons, using tert-butylhydroperoxide (TBHP) and molecular oxygen (O2) as oxidants. Excellent conversions were...

Asymmetric macrocyclic complexes of the type [M2LCl2]∙xH2O have been obtained and intercalated using the potassium precursor phase, K0.4Mn0.8PS3∙H2O (M: ZnII or CuII; LH2: macrocyclic ligand derived from 2-hidroxy-5-methyl-1,3-benzenedicarbaldehyde and two different amines, ethylenediamine and o-phenylenediamine). The intercalation of the layered p...

The spectroscopic, electrochemical and photophysical properties of the first ReI organometallic organoimido-polyoxometalate complex [n-Bu4N][Mo6O18NC6H4-CH2-N3C2H2-Re-phen(CO)3] compared with all fragments are reported. The UV-Vis spectra are analysed using experimental and theoretical tools. In contrast to reported studies in the literature, our r...

A new CuII-GdIII heterometallic coordination polymer was obtained by a two-step synthesis, using the molecular complex [Cu(H2IDC)2(2,2’-bipy)]·2H2O (1) as metalloligand and oxalate as auxiliary ligand (H3IDC = 1H-imidazole-4,5-dicarboxylic acid). The new extended heterometallic network [Gd(H2O)2(C2O4)Cu(IDC)]·H2O (2) crystallizes in a P-1 triclinic...

Abstract Novel 3d/4f heterometallic 3D networks, based on CoII/GdIII cations and imidazole-4,5-dicarboxylic acid (H3IDC) and oxalate which are acting as main and auxiliary ligand, respectively, were hydro/solvothermally synthesized using different synthetic strategies . While [Gd(H2O)(C2O4)Co(IDC)(H2O)1.26(CH3CH2OH)0.74]∙1.75H2O (1) was obtained in...

{[Cu3Ln2(oda)6(H2O)6]·nH2O}n (LnIII: La, Gd, Yb; odaH2: oxydiacetic acid) are reported as reusable heterogeneous catalysts in the oxidation of olefins. An influence of the LnIII ion on the catalytic performance of the series is observed, where the YbIII based framework presents a larger activity. The mentioned heteronuclear species are catalyticall...

Copper(II) phosphate bridged compounds have been studied by DFT methods in order to have a better understanding of the magnetic exchange interactions through 1,1 and 1,3- bridges, which vary with the bonding modes of the ligand. In many cases phosphate is only one among several bridging ligands making difficult to assign the predominant exchange pa...

Two new polyoxovanadoborates based crystalline lattices are being reported: K5(H3O)2(1,3-diapH2)2[V12B18O60H6]·10.80H2O (1), and K2(H3O)7(enH2)[V12B18O60H6]·9H2O (2). These structures are characterized by presenting multiple hydrogen bonds between the diprotonated diamines (enH2 and 1,3-diapH2) and hydronium ions, and the oxygen atoms of the [V12B1...

In this work we are reporting the synthesis and characterization of nanocomposites obtained from the direct reduction of nickel(II) salts on matrices of polyethylene (Pe) and chitosan (Ch) in the presence of serine, under solvothermal conditions. Using different molar ratios between the metal salt (M) and amino acid (AA), eight nanocomposites were...

This review summarizes all published data until April 2015 related to crystalline lattices formed by the [V12B18O60] core, which generates polyanionic clusters with different degrees of protonation and mixed-valence ratios. The negative charge of this cluster is counterbalanced by different cations such as protonated amines, hydronium, and alkaline...

M´0.2Mn0.8PS3•0.25H2O materials are obtained by a mild microwave assisted reaction (M´=CoII, NiII, CuII, ZnII), which permitted to obtain the first copper(II) bimetallic phase. All these materials have a lower energy GAP and antiferromagnetic interactions with lower values of the Weiss constant, than that of the pristine phase MnPS3.

We report the crystal face indexing and molecular spatial orientation magnetic properties, electron paramagnetic resonance (EPR) spectra and DFT calculations of two previously reported oxovanadium phosphates functionalized with CuII complexes, [Cu(bipy)(VO2)(PO4)]n (1) and [{Cu(phen)}2(VO2(H2O)2)(H2PO4)2 (PO4)]n (2), where bipy= 2,2`-bipyridine and...

A family of macrocyclic complexes [M2LnCl2] have been synthesized and characterized (M: CuII or ZnII; Ln: macrocyclic ligand derived from 2-hydroxy-5-methyl-1,3-benzenedicarbaldehyde and different aliphatic diamines and o-phenylenediamine). The influence of the aromaticity of the ligand and the metal center on the spectroscopic properties of the co...

In the present work, the synthesis and structural characterization of two new polyoxovanadoborate (BVO) frameworks, based on the [V12B18O60H6]10− polyanion, are reported, K(H3O)(enH2)4[V12B18O60H6]·9.60H2O (1) and Li8(NH4)2[V12B18O60H6]·8.02H2O (2). Both compounds are obtained in a mixed valence ratio of 10VIV/2VV. Framework 1 is characterized by p...

The challenges of designing and synthesizing new materials, the complexity of their structures, and their potential physical properties have continued to attract a great deal of interest. The combination of organic and inorganic components into the same molecular backbone has captivated many researchers, and as a consequence of the multiple choices...

In the present work, the synthesis and structural characterization of four new polyoxovanadoborates (BVO) frameworks, based on the [V12B18O60H6]10- polyanion are reported: (NH4)8(1,3-diapH2)[V12B18O60H6]•5.24H2O (1), K8(NH4)2[V12B18O60H6]•18.00H2O (2), K10[V12B18O60H6]•9.50H2O (3) and K8Cs2[V12B18O60H6]•10.40H2O (4). A global antiferromagnetic beha...

The metal–organic framework [Cu2(bipy)2(btec)]∞ was used as a heterogeneous catalyst in the liquid phase oxidation of styrene and cyclohexene with tert-butylhydroperoxide (TBHP) as the oxidant either in water–dichloroethane or n-decane medium. Four catalytic systems were tested and compared after 6 hours of reaction. The oxidation of styrene using...

A new tetranuclear complex Cu4, [Cu2L(OH)]2[middle dot]2CH3OH[middle dot]H2O (1), with the functionalized Schiff base ligand 2,6-bis((2-(acetylamino)phenylimino)methyl)-4-tert-butylphenol (H3L) has been obtained and characterized in the solid state by X-ray diffraction. The formation of the tetranuclear species is solvent dependent, the presence of...

Coated stable metallic nickel nanocrystals (fcc-Ni) forming micro-and nanoaggregates with different morphologies have been synthesized through a one-pot Ni-II reduction process in the presence of L-serine (Ni-1 to Ni-5). The subsequent warming under solvothermal conditions of the spherical nickel particles (Ni-1) with ethylene glycol (EG) modifies...

In this work we present the synthesis and characterization of iron oxide nanoparticles (IONPs), which were structurally and magnetically characterized. The use of iron salts and an organic acid (l-serine or ascorbic acid) as precursors under solvothermal conditions yielded these coated IONPs. The powder X-ray diffraction pattern of FeO-1 and FeO-2...

Six new composites derived from the intercalation of the MPS3 phases (M = MnII, CdIII) with the macrocyclic manganese(III) complex [MnL(H2O)2].NO3(H2O) (LH2 = Schiff base macrocyclic ligand derived from the condensation of 2-hydroxy-5-methy1-1,3-benzene-dicarbaldehyde and 1,2-diamine-benzene) were obtained by two different synthetic procedures: a c...

In the present paper a copper(II) phosphovanadate is presented and formulated as [Cu-6(phen)(6)((VO2)-O-v)(6) (PO4)(6)((VO2HO)-O-v)(3)] (1a). This compound was obtained by hydrothermal synthesis and crystallizes in the triclinic group P-1, with a = 10.6290(5), b = 17.4275(8), c= 23.6151(11) angstrom; alpha = 92.888(4),degrees beta = 98.910(4)degree...

In the structure of the title compound, {[Cu2(C10H2O8)(H2O)6]·4H2O}n, the benzene-1,2,4,5-tetra­carboxyl­ate ligand, (btec)⁴⁻, is located on a crystallographic inversion centre in a μ4-coordination mode. The coordination environment of each penta­coordinated CuII centre is square pyramidal (SBP), formed by three water mol­ecules and two carboxyl­at...

An unusual and unique conformation of a paddle wheel type binuclear copper(II) complex containing acetate and acetamido ligands, {Cu2(μ2-O2CCH3)4}(OCNH2CH3) (1), was obtained by solvothermal synthesis. The structural characterization of this compound shows that the apical (acetamido) ligands are disposed at a 62° dihedral angle, generating a specia...

In this work we report the structural and magnetic characterization of a new three-dimensional porous metal–organic framework (MOF) based on iron(III) and the formate anion, [Fe(HCO2)3]n·nHCO2H (1), which was obtained by solvothermal synthesis. The tridimensional structure crystallizes in the trigonal space group Rc and is formed by highly regular...

A new iron(III)/vanadium(III) phosphate, K3[Fe3.26V0.74(OH)O(PO4)4(H2O)2]·2H2O (1), has been obtained by hydrothermal synthesis and characterized by single crystal X-ray diffraction, Scanning electron microscopy–energy dispersive X-ray spectroscopy, Inductively coupled plasma atomic emission spectroscopy (ICP), thermogravimetric analysis, and FTIR...

The title complex, [NaNi(C5H7O2)3]n, contains an anionic tris­(acetyl­acetonato)nickelate(II) unit, [Ni(acac)3]⁻ (acac is acetyl­acetonate), with a highly regular octa­hedral coordination geometry. The NiII cation lies on a Wyckoff a site, resulting in D3 symmetry of the anion. Charge balance is provided by sodium cations, which occupy Wyckoff type...

The magnetic properties of [(VO)(3)(mu-PO4)(2)(2,2'-bpy)(mu-OH2)]1/3H(2)O (1) and (VO)(2)H4P2O9 (2), a tubular and a layered vanadium(IV) phosphates containing triply oxido bridged V-IV dimers, are analyzed considering the Bleaney-Bowers S = 1/2 dimer model. In compound 1 the presence of an additional V-IV connected with the V-IV dimers through mu(...

A theoretical study of the magnetic properties, using density functional theory, of a family of trinuclear μ(3)-OH copper(II) complexes reported in the literature is presented. The reported X-ray crystal structures of [Cu(3)(μ(3)-OH)(aat)(3)(H(2)O)(3)](NO(3))(2)·H(2)O (HUKDUM), where aat: 3-acetylamine-1,2,4-triazole; [Cu(3)(μ(3)-OH)(aaat)(3)(H(2)S...

Hybrid materials, formed by strong absorbing macrocyclic complexes [Zn2L]·(NO3)2·H2O or [MnL(H2O)2]·NO3·H2O (LH2: macrocyclic ligand obtained from the [2 + 2] condensation of 2-hydroxy-5-methyl-1,3-benzenedicarbaldehyde and 1,2-diaminobenzene) intercalated in MnPS3 and CdPS3 layered phases, were obtained by the ion exchange method using the potassi...

Two organo-inorganic hybrid manganese(II) vanadates [Mn(phen)2(VO3)2]∞ (1) and [{Mn(bipy)(VO3)2}{VO2(bipy)}(VO3)(V2O6)]∞ (2) were synthesized hydrothermally. Compound 1 is a chain consisting in VO3 units propagating along the b axis, decorated with {Mn(phen)2}+2 subunits. Compound 2 is a ladder like structure propagating along the a axis, consistin...

In this work, we describe for first time, the structure and magnetic characterization of the one dimensional catena cis-[Ni(mu-ox)(H2O)(2)](infinity) (1), which was obtained by solvothermal synthesis. Cis-[Ni(mu-ox)(H2O)(2)]infinity crystallizes in a C2/c spatial group. The asymmetric unit contains only one type of nickel atom, oxalate ligand and w...

A novel coordination polymer[{Cu(en)(2)}(V(10)O(28))](n)center dot 2n[Cu(en)(2)(H(2)O)]center dot 2n(H(3)BO(3))center dot 2n(H(2)O) was obtained by hydrothermal reaction. The compound crystallizes in the monoclinic crystal system, in the C2/c space group, with a = 26.490 (3) angstrom; b = 11.6558 (11) angstrom; c = 19.8426 (19) angstrom; beta = 124...

The search of new inorganic materials with better catalytic properties is an important field of research. Reusability, efficiency and atom economy correspond to the main parameters to characterize a catalyst. In this work, we inform the effectiveness of [Cu(H2btec)(bipy)]∞ (H4btec = 1,2,4,5-benzenetetracarboxylic acid) as an heterogeneous coordinat...

The intercalation of the cationic binuclear macrocyclic complex [Zn2L](2+) (LH2: macrocyclic ligand obtained by the template condensation of 2-hydroxy-5-methyl-1,3-benzenedicarbaldehyde and 1,2-diaminobenzene) was achieved by a cationic exchange process, using K0.4Mn0.8PS3 as a precursor. Three intercalated materials were obtained and characterized...

Three compounds based on the polyoxometalate building block [V12B18O60H6], (Na)(10)[(H2O)V12B18O60H6]center dot 18H(2)O (1), Na-8[Cu(en)(2)](2)[V12B18O60H6](NO3)(2)center dot 14.7H(2)O (2), Na-7[Cu(en)(2)](2)[V12B18O60H6] (NO3)center dot 15.5H(2)O (3), (en = ethylenediamine), have been hydrothermally synthesized and characterized by single-crystal...

The hybrid 2D compound [{Cu(bpy)}2(VO)3(PO4)2(HPO4)2]·2H2O (1), has been investigated due to its interesting magnetic and catalytic properties. Compound (1) acts as an efficient catalyst in the epoxidation of cyclohexene and styrene. The chemoselectivity towards the epoxidation of cyclohexene is notoriously higher than the one observed towards styr...

Four mononuclear complexes [Cu(HL(1))Cl]PF(6).CH(3)OH (1), [Cu(HSL(1))Cl]PF(6).0.75H(2)O (2), [Cu(HL(2))Cl]PF(6).CH (3)OH (3), [Cu(HSL(2))Cl]PF(6).1.5CH(3)OH (4), and two polynuclear complexes [Cu (2)(SL(2))(2)](PF(6))(2).2CH(3)OH (5) and {Cu[Cu(SL(2))(Cl)](2)}(PF(6))(2) (6) (HL(1): 2-[(bis(2-pyridylmethyl)-amino)methyl]-4-methylphenol; HSL(1): 2-[...

In this work, we present the synthesis and optical study of the binuclear zinc(II) macrocyclic complexes, derived from 4-methyl-2,6-diformylphenol and 1,2-diaminobenzene (H2L). Two zinc macrocyclic complexes with different anions were prepared and characterized: [Zn2LCl2]·H2O (1) and [Zn2L](NO3)2 (2).The complexes are emissive, both in the solid st...

A structural and magnetic characterization of a trinuclear chiral Mn(II) formate three-dimensional framework exhibiting a triangular arrangement is presented. Compound Na(3)[Mn(3)(HCOO)(9)] was obtained by solvothermal synthesis and crystallizes in the chiral cubic space group P2(1)3 and is well described by a Delta conformation. The structure disp...

A new extended metal-organic framework [Cu(H2btec)(bipy)]infinity. (1) (H4btec= 1,2,4,5-benzenetetracarboxylic acid; bipy = 2,2'-bipyridine) has been hydrothermally synthesized. Violet crystals are formed in a monoclinic system with a space group C2/c; a = 10.1810(18) A, b = 14.4360(18) A, c = 12.894(3) A, beta = 112.94(3) degrees. In the title com...

Dinuclear [{M(phen)2}2V4O12] C6H12O H2O (M=CoII 1, MnII 2, NiII 3 and CuII 4) and [{Cu(phen)2}2- V4O12] 3.5H2O 5 has been prepared by biphasic and hydrothermal syntheses, respectively. All five structures exhibit the {V4O12}4 cluster in a chair-like configuration, covalently bonded to two [M(phen)2]2+ fragments, producing a super-exchange magnetic...

The structure of the title compound, (C10H10N3)(2)[ZnCl4], is composed of C10H9N3H+ ( DPAH(+)) cations and [ ZnCl4](2-) anions. The two pyridyl rings of DPAH+ are approximately coplanar, with a dihedral angle of 7.2 ( 2)degrees between their corresponding least-squares planes. The proton is disordered in a one-to-one ratio over the two chemically e...

The hybrid organo-inorganic compounds [Cu4(bipy)4V4O11(PO4)2]nH2O (n 5) (1), [Cu2(phen)2(PO4)(H2PO4)2(VO2) Æ 2H2O] (2) and [Cu2(phen)2(O3PCH2PO3)(V2O5) (H2O)]H2O (3) which present different bridging forms of the phosphate/phosphonate group, show different bulk magnetic properties. We herein analyze the magnetic behaviour of these compounds in term...

The hydrazine oxidation by iron(II) phthalocyanine (Fe(II)Pc) has been studied using an energy profile framework through quantum chemistry theoretical models calculated in the gas phase at the density functional theory B3LYP/LACVP(d) level. We applied two models of charge-transfer mechanisms previously reported (J. Phys. Chem. A 2005, 109, 1196) fo...

A group of dinuclear copper(II) compounds containing the macrocyclic complexes Cu2L2+ (LH2 = C(24)H(2)sN(4)O(4): a ligand derived from the condensation of 4-methyl-2,6-diformylphenol with 1,3-diamine-2-propanol) have been prepared, and characterised both structurally and magnetically. The compounds, containing different counterions, were formulated...

Mixed valence dinuclear iron(II,III) complexes of the type [Fe2L2(H2O)(4)](NO3)(H2O)(3), where L is the dianion of a Schiff base ligand derived from alpha-amino acids (glycine and L-isolecine) and 5-bromosalicylaldehyde, have been prepared and characterised using different spectroscopic methods, magnetic susceptibility, conductivity, and electroche...

Two quantum chemistry theoretical models in the gas phase at the density functional theory B3LYP/LACVP(d) level of calculation are proposed to rationalize the hydrazine oxidation by cobalt(II) phthalocyanine (Co(II)Pc). This oxidation reaction involves the net transfer of four electrons. These theoretical models that are described in terms of energ...

A series of dinuclear iron (III) complexes with carboxylate bridges, of the type [Fe2L2(H20)4](NO3)2(H2O)m (m=1–3), where L=Schiff base derived from L-α-amino acids and salicylaldehyde have been prepared and characterised by different spectroscopic techniques, magnetic susceptibility, conductivity, and electrochemical measurements. The dimeric iron...

The Ru atom in the title compound, [Ru(C6H5CN)2{P(C6H5)3}{C6H4(NH)2}(H2O)](BF4)2·H2O, has six-coordinate octahedral geometry, with a trans arrangement of the tri­phenyl­phosphine ligand and the water mol­ecule. The asymmetric unit contains one complex cation, two tetra­fluoro­borate anions and one solvent water mol­ecule, which is disordered over t...

We are very interested in characterizing ligands derived from salicyl­aldehyde and α-amino acids. These ligands form interesting complexes with different transition metals, which are very useful for understanding some biological systems. For Schiff bases derived from salicyl­aldehyde and different alkyl­amines or aryl­amines, the enol–imine form is...

We are very interested in characterizing ligands derived from salicyl­aldehyde and α-amino acids. These ligands form interesting complexes with different transition metals, which are very useful for understanding some biological systems. For Schiff bases derived from salicyl­aldehyde and different alkyl­amines or aryl­amines, the enol–imine form is...

Una serie de complejos diméricos de hierro formados a partir de iminas derivadas de α-amino ácidos (glicina, alanina, valina, leucina, isoleucina, fenilalanina) y salicilaldehido o 5-bromosalicilaldehido han sido sintetizados y caracterizados por técnicas espectroscópicas, además de medidas electroquímicas y magnetoquímicas.A través de medidas de...